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Kim JT, Kennedy S, Phiri I, Ryou SY. Plasma Surface Treatment of Cu Current Collectors for Improving the Electrochemical Performance of Si Anodes. ACS Appl Mater Interfaces 2024; 16:11400-11407. [PMID: 38409749 DOI: 10.1021/acsami.3c15971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
The practical utilization of Si electrodes is hindered by their substantial volume expansion during alloying and dealloying processes, which causes mechanical damage and separation from Cu current collectors. To alleviate the problem of Si composite detachment from Cu current collectors, the surface of the Cu current collectors is modified using atmospheric oxygen plasma. Plasma treatment improves the wetting ability of the Cu current collectors and, consequently, the coating quality of the Si electrodes. The uniform distribution of the Si electrode components reduces the sheet resistance and improves the adhesion properties of the Si electrodes containing surface-modified Cu current collectors. As a result, the volume expansion of Si during alloying and dealloying is reduced; this results in an excellent rate capability of 1584 mA h g-1 at a current density of 3.6 A g-1 (135% that of bare Cu) and excellent cycle performance of 1545 mA h g-1 after 300 cycles (Si electrodes with bare Cu exhibit 930 mA h g-1). Therefore, the developed plasma treatment method for Cu current collectors is expected to be an economical and efficient approach for improving the Li-ion battery performance.
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Affiliation(s)
- Jeong-Tae Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Ssendagire Kennedy
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Isheunesu Phiri
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Sun-Yul Ryou
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
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Kim J, Phiri I, Ryou SY. Synergistically Stabilizing Thin Li Metal through the Formation of a Stable and Highly Conductive Solid Electrolyte Interface and Silver-Lithium Alloy. ACS Appl Mater Interfaces 2023; 15:46765-46774. [PMID: 37769116 DOI: 10.1021/acsami.3c07731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
In this study, a stable solid electrolyte interface (SEI) and a Ag-Li alloy were formed through a simple slurry coating of silver (Ag) nanoparticles and Li nitrate (LiNO3) on a Li metal surface (AgLN-coated Li). The Ag-Li alloy has a high Li diffusion coefficient, which allowed the inward transfer of Li atoms, thus allowing Li to be deposited below the alloy. Moreover, the highly conductive SEI enabled the fast diffusion of Li ions corresponding to the alloy. This inward transfer resulted in dendrite suppression and improved the Coulombic efficiency (CE). The AgLN-coated Li exhibited an initial capacity retention >81% and CE > 99.7 ± 0.2% over 500 cycles at a discharge capacity of 2.3 mA h cm-2.
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Affiliation(s)
- Jungmin Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Isheunesu Phiri
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Sun-Yul Ryou
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
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Poncin M, Marembo J, Chitando P, Sreenivasan N, Makwara I, Machekanyanga Z, Nyabyenda W, Mukeredzi I, Munyanyi M, Hidle A, Chingwena F, Chigwena C, Atuhebwe P, Matzger H, Chigerwe R, Shaum A, Date K, Garone D, Chonzi P, Barak J, Phiri I, Rupfutse M, Masunda K, Gasasira A, Manangazira P. Implementation of an outbreak response vaccination campaign with typhoid conjugate vaccine – Harare, Zimbabwe, 2019. Vaccine X 2022; 12:100201. [PMID: 35983519 PMCID: PMC9379662 DOI: 10.1016/j.jvacx.2022.100201] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 05/07/2022] [Accepted: 07/29/2022] [Indexed: 12/02/2022] Open
Abstract
Introduction Typhoid fever is a public-health problem in Harare, the capital city of Zimbabwe, with seasonal outbreaks occurring annually since 2010. In 2019, the Ministry of Health and Child Care (MOHCC) organized the first typhoid conjugate vaccination campaign in Africa in response to a recurring typhoid outbreak in a large urban setting. Method As part of a larger public health response to a typhoid fever outbreak in Harare, Gavi approved in September 2018 a MOHCC request for 340,000 doses of recently prequalified Typbar-TCV to implement a mass vaccination campaign. To select areas for the campaign, typhoid fever surveillance data from January 2016 until June 2018 was reviewed. We collected and analyzed information from the MOHCC and its partners to describe the vaccination campaign planning, implementation, feasibility, administrative coverage and financial costs. Results The campaign was conducted in nine high-density suburbs of Harare over eight days in February–March 2019 and targeted all children aged 6 months–15 years; however, the target age range was extended up to 45 years in one suburb due to the past high attack rate among adults. A total of 318,698 people were vaccinated, resulting in overall administrative coverage of 85.4 percent. More than 750 community volunteers and personnel from the MOHCC and the Ministry of Education were trained and involved in social mobilization and vaccination activities. The MOHCC used a combination of vaccination strategies (i.e., fixed and mobile immunization sites, a creche and school-based strategy, and door-to-door activities). Financial costs were estimated at US$ 2.39 per dose, including the vaccine and vaccination supplies (US$ 0.79 operational costs per dose excluding vaccine and vaccination supplies). Conclusion A mass targeted campaign in densely populated urban areas in Harare, using the recently prequalified typhoid conjugate vaccine, was feasible and achieved a high overall coverage in a short period of time.
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Affiliation(s)
- M. Poncin
- World Health Organization, Geneva, Switzerland
- Corresponding author at: Square Clair-Matin 44, 1213 Petit Lancy, Switzerland.
| | - J. Marembo
- Ministry of Health and Child Care, Harare, Zimbabwe
| | - P. Chitando
- Harare City Health Department, Harare, Zimbabwe
| | - N. Sreenivasan
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, USA
| | - I. Makwara
- Ministry of Health and Child Care, Harare, Zimbabwe
| | | | | | | | - M. Munyanyi
- Ministry of Health and Child Care, Harare, Zimbabwe
| | | | | | - C. Chigwena
- Ministry of Health and Child Care, Harare, Zimbabwe
| | - P. Atuhebwe
- World Health Organization, Brazzaville, Republic of the Congo
| | - H. Matzger
- World Health Organization, Geneva, Switzerland
| | - R. Chigerwe
- Harare City Health Department, Harare, Zimbabwe
| | | | - K. Date
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, USA
| | - D. Garone
- Médecins Sans Frontières, Brussels, Belgium
| | - P. Chonzi
- Harare City Health Department, Harare, Zimbabwe
| | - J. Barak
- United Nations Children's Fund, Harare, Zimbabwe
| | - I. Phiri
- Ministry of Health and Child Care, Harare, Zimbabwe
| | | | - K. Masunda
- Harare City Health Department, Harare, Zimbabwe
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Phiri I, Kim J, Afumaa Afrifah V, Kim JT, Lee Y, Ryou SY. Dendrite Suppression by Lithium-Ion Redistribution and Lithium Wetting of Lithium Zeolite Li 2(Al 2Si 4O 12) in Liquid Electrolytes. ACS Appl Mater Interfaces 2022; 14:49689-49699. [PMID: 36261816 DOI: 10.1021/acsami.2c12512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Lithium metal is considered a next-generation anode material for high-voltage, high-energy-density batteries; however, its commercialization is limited because of dendrite formation during charging, which leads to short-circuiting and fire. Li metal is coated with a lithium zeolite Li2(Al2Si4O12) (bikitaite - BKT) for dendrite suppression. The BKT-coated Li metal anode exhibits enhanced cycle performance for both Li/LMO (over 982 cycles) and Li/Li cells (over 2000 h at 0.52.0 mAh cm-2 and 693 h at 2.0 mAh cm-2). Moreover, the voltage profile of the Li/Li cells deviates from the conventional Li plating behavior. We hypothesize that this is due to the Li wetting of the BKT particles during plating, which leads to the formation of an interconnected three-dimensional (3D) Li network. Furthermore, BKT, a Li conductor, promotes even Li+-ion distribution during plating, resulting in the uniform deposition of Li and, consequently, suppressed dendrite formation. This work provides evidence that BKT can be potentially used in Li metal batteries.
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Affiliation(s)
- Isheunesu Phiri
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Jungmin Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Vera Afumaa Afrifah
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Jeong-Tae Kim
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
| | - Yongmin Lee
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Sun-Yul Ryou
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon 34158, Republic of Korea
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Phiri I, Kim J, Oh DH, Ravi M, Bae HS, Hong J, Kim S, Jeong YC, Lee YM, Lee YG, Ryou MH. Synergistic Effect of a Dual-Salt Liquid Electrolyte with a LiNO 3 Functional Additive toward Stabilizing Thin-Film Li Metal Electrodes for Li Secondary Batteries. ACS Appl Mater Interfaces 2021; 13:31605-31613. [PMID: 34192462 DOI: 10.1021/acsami.1c04972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Li metal thickness has been considered a key factor in determining the electrochemical performance of Li metal anodes. The use of thin Li metal anodes is a prerequisite for increasing the energy density of Li secondary batteries intended for emerging large-scale electrical applications, such as electric vehicles and energy storage systems. To utilize thin (20 μm thick) Li metal anodes in Li metal secondary batteries, we investigated the synergistic effect of a functional additive (Li nitrate, LiNO3) and a dual-salt electrolyte (DSE) system composed of Li bis(fluorosulfonyl)imide (LiTFSI) and Li bis(oxalate)borate (LiBOB). By controlling the amount of LiNO3 in DSE, we found that DSE containing 0.05 M LiNO3 (DSE-0.05 M LiNO3) significantly improved the electrochemical performance of Li metal anodes. DSE-0.05 M LiNO3 increased the cycling performance by 146.3% [under the conditions of a 1C rate (2.0 mA cm-2), DSE alone maintained 80% of the initial discharge capacity up to the 205th cycle, whereas DSE-0.05 M LiNO3 maintained 80% up to the 300th cycle] and increased the rate capability by 128.2% compared with DSE alone [the rate capability of DSE-0.05 M LiNO3 = 50.4 mAh g-1, and DSE = 39.3 mAh g-1 under 7C rate conditions (14.0 mA cm-2)]. After analyzing the Li metal surface using scanning electron microscopy and X-ray photoelectron spectroscopy, we were able to infer that the stabilized solid electrolyte interphase layer formed by the combination of LiNO3 and the dual salt resulted in a uniform Li deposition during repeated Li plating/stripping processes.
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Affiliation(s)
- Isheunesu Phiri
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Jungmin Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Dong-Hoon Oh
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Muchakayala Ravi
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Hyeon-Su Bae
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Jinseok Hong
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Sojin Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
| | - Yong-Cheol Jeong
- Micro/Nano Scale Manufacturing R&D Department, KITECH, Ansan 426-910, Republic of Korea
| | - Yong Min Lee
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu 42988, Republic of Korea
| | - Young-Gi Lee
- Intelligent Sensors Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Republic of Korea
| | - Myung-Hyun Ryou
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Republic of Korea
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Lee KS, Phiri I, Park CW, Kim S, Ko JM. Nature inspired approach to mimic design for increased specific capacitance as supercapacitor electrodes. J Colloid Interface Sci 2021; 592:42-50. [PMID: 33639537 DOI: 10.1016/j.jcis.2021.02.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/30/2021] [Accepted: 02/09/2021] [Indexed: 11/16/2022]
Abstract
In this study, the experiment was conducted assuming that the citrus fruits were contaminated with bacteria. Herein, orange peels (OP) and lemon peels (LP) can be used as a carbon source and have the advantage of using discarded materials and heteroatoms. Also, the nitrogen heteroatom is introduced by naturally doping the materials with bacteria (Escherichia Coli, E. coli). The as-prepared bacteria doped activated carbon showed an increase in nitrogen content and surface properties which led to an improvement in electrochemical properties. The specific capacitance of bacteria doped OP and LP was 92.4 and 139 Fg-1 compared to the bare samples with a specific capacitance of 60.9 and 49.6 Fg-1 at a current density of 0.2Ag-1 and capacity retention of 129% after 10,000 cycles for the bacteria-doped samples. This process which is simple, cheap, and environmentally friendly can be applied to discarded fruit peels for the fabrication of supercapacitor materials.
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Affiliation(s)
- Kwang Se Lee
- Department of Advanced Materials & Chemical Engineering, Kyungnam College of Information & Technology, 45 Jurye-ro, Sasang-gu, Busan, South Korea.
| | - Isheunesu Phiri
- Department of Applied Chemistry & Biotechnology, Hanbat National University, San 16-1 Dukmyung-Dong, Yuseong-Gu, Daejeon 305-719, Republic of Korea
| | - Chan Woo Park
- Decontamination & Decommissioning Research Division, Korea Atomic Energy Research Institute, Daedeok-daero 989-111, Yuseong-gu, Daejeon, Republic of Korea
| | - Saeheon Kim
- Department of Advanced Materials & Chemical Engineering, Kyungnam College of Information & Technology, 45 Jurye-ro, Sasang-gu, Busan, South Korea.
| | - Jang Myoun Ko
- Department of Applied Chemistry & Biotechnology, Hanbat National University, San 16-1 Dukmyung-Dong, Yuseong-Gu, Daejeon 305-719, Republic of Korea.
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Lee KS, Phiri I, Park JH, Ko JM, Kim SH. Novel structure of bacteria doped ZnO particles: Facile and green synthesis route to prepare hybrid material for supercapacitor electrodes. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.02.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Lee KS, Phiri I, Kim SH, Oh K, Ko JM. Preparation and Electrical Properties of Silicone Composite Films Based on Silver Nanoparticle Decorated Multi-Walled Carbon Nanotubes. Materials (Basel) 2021; 14:948. [PMID: 33671454 PMCID: PMC7923106 DOI: 10.3390/ma14040948] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/09/2021] [Accepted: 02/12/2021] [Indexed: 11/25/2022]
Abstract
The electrical properties of silicone composite films filled with silver (Ag) nanoparticle-decorated multi-walled carbon nanotubes (MWNT) prepared by solution processing are investigated. Pristine MWNT is oxidized and converted to the acyl chloride-functionalized MWNT using thionyl chloride, which is subsequently reacted with amine-terminated poly(dimethylsiloxane) (APDMS). Thereafter, APDMS-modified MWNT are decorated with Ag nanoparticles and then reacted with a poly(dimethylsiloxane) solution to form Ag-decorated MWNT silicone (Ag-decorated MWNT-APDMS/Silicone) composite. The morphological differences of the silicone composites containing Ag-decorated MWNT and APDMS-modified MWNT are observed by transmission electron microscopy (TEM) and the surface conductivities are measured by the four-probe method. Ag-decorated MWNT-APDMS/Silicone composite films show higher surface electrical conductivity than MWNT/silicone composite films. This shows that the electrical properties of Ag-decorated MWNT-APDMS/silicone composite films can be improved by the surface modification of MWNT with APDMS and Ag nanoparticles, thereby expanding their applications.
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Affiliation(s)
- Kwang Se Lee
- Department of Advanced Materials & Chemical Engineering, Kyungnam College of Information & Technology, 45 Jurye-ro, Sasang-gu, Busan 47011, Korea;
| | - Isheunesu Phiri
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo‐daero, Yuseong‐gu, Daejeon 34158, Korea; (I.P.); (S.H.K.)
| | - Sang Hern Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo‐daero, Yuseong‐gu, Daejeon 34158, Korea; (I.P.); (S.H.K.)
| | - Kyeongkeun Oh
- Institute for New Technology Education, Korea Polytechnics, 20 Yusang-ro, Deokjin-gu, Jeonju 54853, Korea
| | - Jang Myoun Ko
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo‐daero, Yuseong‐gu, Daejeon 34158, Korea; (I.P.); (S.H.K.)
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Lee KS, Park CW, Phiri I, Ko JM. New design for Polyaniline@Multiwalled carbon nanotubes composites with bacteria doping for supercapacitor electrodes. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.123014] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Park J, Kim J, Jung DS, Phiri I, Bae HS, Hong J, Kim S, Lee YG, Ryou MH, Lee K. Microalgae-Templated Spray Drying for Hierarchical and Porous Fe 3O 4/C Composite Microspheres as Li-ion Battery Anode Materials. Nanomaterials (Basel) 2020; 10:nano10102074. [PMID: 33092192 PMCID: PMC7589054 DOI: 10.3390/nano10102074] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/13/2020] [Accepted: 10/15/2020] [Indexed: 02/03/2023]
Abstract
A method of microalgae-templated spray drying to develop hierarchical porous Fe3O4/C composite microspheres as anode materials for Li-ion batteries was developed. During the spray-drying process, individual microalgae serve as building blocks of raspberry-like hollow microspheres via self-assembly. In the present study, microalgae-derived carbon matrices, naturally doped heteroatoms, and hierarchical porous structural features synergistically contributed to the high electrochemical performance of the Fe3O4/C composite microspheres, enabling a discharge capacity of 1375 mA·h·g-1 after 700 cycles at a current density of 1 A/g. Notably, the microalgal frameworks of the Fe3O4/C composite microspheres were maintained over the course of charge/discharge cycling, thus demonstrating the structural stability of the composite microspheres against pulverization. In contrast, the sample fabricated without microalgal templating showed significant capacity drops (up to ~40% of initial capacity) during the early cycles. Clearly, templating of microalgae endows anode materials with superior cycling stability.
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Affiliation(s)
- Jinseok Park
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea;
| | - Jungmin Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.K.); (I.P.); (H.-S.B.); (J.H.); (S.K.)
| | - Dae Soo Jung
- Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju 52851, Korea;
| | - Isheunesu Phiri
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.K.); (I.P.); (H.-S.B.); (J.H.); (S.K.)
| | - Hyeon-Su Bae
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.K.); (I.P.); (H.-S.B.); (J.H.); (S.K.)
| | - Jinseok Hong
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.K.); (I.P.); (H.-S.B.); (J.H.); (S.K.)
| | - Sojin Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.K.); (I.P.); (H.-S.B.); (J.H.); (S.K.)
| | - Young-Gi Lee
- Intelligent Sensors Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea
- Correspondence: (Y.-G.L.); (M.-H.R.); (K.L.); Tel.: +82-42-860-6822 (Y.-G.L.); +82-42-821-1534 (M.-H.R.); +82-42-821-8610 (K.L.)
| | - Myung-Hyun Ryou
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.K.); (I.P.); (H.-S.B.); (J.H.); (S.K.)
- Correspondence: (Y.-G.L.); (M.-H.R.); (K.L.); Tel.: +82-42-860-6822 (Y.-G.L.); +82-42-821-1534 (M.-H.R.); +82-42-821-8610 (K.L.)
| | - Kyubock Lee
- Graduate School of Energy Science and Technology, Chungnam National University, Daejeon 34134, Korea
- Correspondence: (Y.-G.L.); (M.-H.R.); (K.L.); Tel.: +82-42-860-6822 (Y.-G.L.); +82-42-821-1534 (M.-H.R.); +82-42-821-8610 (K.L.)
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Choi J, Yang K, Bae HS, Phiri I, Ahn HJ, Won JC, Lee YM, Kim YH, Ryou MH. Highly Stable Porous Polyimide Sponge as a Separator for Lithium-metal Secondary Batteries. Nanomaterials (Basel) 2020; 10:nano10101976. [PMID: 33036223 PMCID: PMC7600698 DOI: 10.3390/nano10101976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 09/26/2020] [Accepted: 09/30/2020] [Indexed: 11/16/2022]
Abstract
To inhibit Li-dendrite growth on lithium (Li)-metal electrodes, which causes capacity deterioration and safety issues in Li-ion batteries, we prepared a porous polyimide (PI) sponge using a solution-processable high internal-phase emulsion technique with a water-soluble PI precursor solution; the process is not only simple but also environmentally friendly. The prepared PI sponge was processed into porous PI separators and used for Li-metal electrodes. The physical properties (e.g., thermal stability, liquid electrolyte uptake, and ionic conductivity) of the porous PI separators and their effect on the Li-metal anodes (e.g., self-discharge and open-circuit voltage properties after storage, cycle performance, rate capability, and morphological changes) were investigated. Owing to the thermally stable properties of the PI polymer, the porous PI separators demonstrated no dimensional changes up to 180 °C. In comparison with commercialized polyethylene (PE) separators, the porous PI separators exhibited improved wetting ability for liquid electrolytes; thus, the latter improved not only the physical properties (e.g., improved the electrolyte uptake and ionic conductivity) but also the electrochemical properties of Li-metal electrodes (e.g., maintained stable self-discharge capacity and open-circuit voltage features after storage and improved the cycle performance and rate capability) in comparison with PE separators.
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Affiliation(s)
- Junyoung Choi
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.C.); (H.-S.B.); (I.P.)
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeongro, Yuseong-gu, Daejeon 34114, Korea; (K.Y.); (H.J.A.); (J.C.W.)
- Korea Research Institute of Chemical Technology (KRICT) School, University of Science and Technology, 217 Gajeongro, Yuseong-gu, Daejeon 34113, Korea
| | - Kwansoo Yang
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeongro, Yuseong-gu, Daejeon 34114, Korea; (K.Y.); (H.J.A.); (J.C.W.)
- Korea Research Institute of Chemical Technology (KRICT) School, University of Science and Technology, 217 Gajeongro, Yuseong-gu, Daejeon 34113, Korea
| | - Hyeon-Su Bae
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.C.); (H.-S.B.); (I.P.)
| | - Isheunesu Phiri
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.C.); (H.-S.B.); (I.P.)
| | - Hyun Jeong Ahn
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeongro, Yuseong-gu, Daejeon 34114, Korea; (K.Y.); (H.J.A.); (J.C.W.)
- Korea Research Institute of Chemical Technology (KRICT) School, University of Science and Technology, 217 Gajeongro, Yuseong-gu, Daejeon 34113, Korea
| | - Jong Chan Won
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeongro, Yuseong-gu, Daejeon 34114, Korea; (K.Y.); (H.J.A.); (J.C.W.)
- Korea Research Institute of Chemical Technology (KRICT) School, University of Science and Technology, 217 Gajeongro, Yuseong-gu, Daejeon 34113, Korea
| | - Yong Min Lee
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-Daero, Daegu 42988, Korea
- Correspondence: (Y.M.L.); (Y.H.K.); (M.-H.R.); Tel.: +82-42-785-6425 (Y.M.L); +82-42-860-7274 (Y.H.K.); +82-42-821-1534 (M.-H.R.)
| | - Yun Ho Kim
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeongro, Yuseong-gu, Daejeon 34114, Korea; (K.Y.); (H.J.A.); (J.C.W.)
- Korea Research Institute of Chemical Technology (KRICT) School, University of Science and Technology, 217 Gajeongro, Yuseong-gu, Daejeon 34113, Korea
- Correspondence: (Y.M.L.); (Y.H.K.); (M.-H.R.); Tel.: +82-42-785-6425 (Y.M.L); +82-42-860-7274 (Y.H.K.); +82-42-821-1534 (M.-H.R.)
| | - Myung-Hyun Ryou
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea; (J.C.); (H.-S.B.); (I.P.)
- Correspondence: (Y.M.L.); (Y.H.K.); (M.-H.R.); Tel.: +82-42-785-6425 (Y.M.L); +82-42-860-7274 (Y.H.K.); +82-42-821-1534 (M.-H.R.)
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Phiri I, Eum KY, Kim JW, Choi WS, Kim SH, Ko JM, Jung H. Simultaneous complementary oil-water separation and water desalination using functionalized woven glass fiber membranes. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.12.049] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Simukoko H, Marcotty T, Phiri I, Vercruysse J, Van den Bossche P. Heterogeneity in the trypanosomosis incidence in Zebu cattle of different ages and sex on the plateau of eastern Zambia. Acta Trop 2007; 103:98-101. [PMID: 17618594 PMCID: PMC2771271 DOI: 10.1016/j.actatropica.2007.05.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2006] [Revised: 03/05/2007] [Accepted: 05/20/2007] [Indexed: 12/01/2022]
Abstract
On the plateau of eastern Zambia, trypanosomosis is endemic. Glossina morsitans morsitans Westwood (Diptera: Glossinidae), the only tsetse species present, is almost entirely dependent on livestock as its source of food with cattle being the most preferred host. To determine if tsetse challenge is distributed equally over the various age categories and sexes within a cattle herd, a longitudinal study of trypanosomosis incidence was conducted during the rainy season. A total of 354 head of cattle consisting of 40% oxen, 30% cows, 15% young stock, 13% calves and 2% bulls were sampled for three consecutive months and their infection statuses determined using the PCR-RFLP technique as diagnostic method. Results indicated that there were significant differences (P<0.001) in the proportion of infected animals between the various categories. In oxen, the risk of infection was 5.6 times higher than in calves. Those results suggest heterogeneity in the challenge by tsetse flies and are in line with entomological observations on the feeding preference of tsetse on cattle. The implications of these results for the control of trypanosomosis in Eastern Province and other epidemiologically related areas are discussed.
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Affiliation(s)
- H. Simukoko
- University of Zambia, School of Veterinary Medicine, Zambia
| | - T. Marcotty
- Institute of Tropical Medicine Antwerp, Animal Health Department, Nationalestraat 155, B-2000 Antwerp, Belgium
| | - I. Phiri
- University of Zambia, School of Veterinary Medicine, Zambia
| | - J. Vercruysse
- Ghent University, Vakgroep Virologie, Parasitologie en Immunologie, Salisburylaan 133, B-9820 Merelbeke, Belgium
| | - P. Van den Bossche
- Institute of Tropical Medicine Antwerp, Animal Health Department, Nationalestraat 155, B-2000 Antwerp, Belgium
- Department of Veterinary Tropical Diseases, University of Pretoria, Onderstepoort, South Africa
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Simukoko H, Marcotty T, Phiri I, Geysen D, Vercruysse J, Van den Bossche P. The comparative role of cattle, goats and pigs in the epidemiology of livestock trypanosomiasis on the plateau of eastern Zambia. Vet Parasitol 2007; 147:231-8. [PMID: 17493757 PMCID: PMC2771273 DOI: 10.1016/j.vetpar.2007.04.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2006] [Revised: 03/30/2007] [Accepted: 04/03/2007] [Indexed: 11/04/2022]
Abstract
To determine and compare the prevalence of trypanosome infections in different livestock species (cattle, pigs and goats) in areas where game animals are scarce and livestock constitute the main food source of tsetse, a survey was conducted on the plateau of the Eastern Province of Zambia in Katete and Petauke districts where Glossina morsitans morsitans is the only tsetse species present. Blood was collected from a total of 734 cattle, 333 goats and 324 pigs originating from 59 villages in both districts and was examined using the buffy coat method and the PCR-RFLP as diagnostic tools. The prevalence of trypanosome infections differed substantially between livestock species. Using microscopic diagnostic methods, trypanosome infections were detected in 13.5% of the cattle and 0.9% of the pigs. All goats were parasitologically negative. The PCR-RFLP analyses increased the trypanosomiasis prevalence to 33.5, 6.5 and 3.3% in cattle, pigs and goats respectively. The majority of the infections (91.2%) were due to Trypanosoma congolense. The presence of a trypanosome infection in cattle and pigs resulted in a significant decline in the packed cell volume. The outcome of the study clearly shows that despite the availability of goats and pigs, cattle seem to be the major livestock species affected by the disease in trypanosomiasis endemic areas. The high proportion of infections in cattle could be partly attributed to their higher availability and attractiveness to tsetse.
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Affiliation(s)
- H. Simukoko
- University of Zambia, School of Veterinary Medicine, South Africa
| | - T. Marcotty
- Institute of Tropical Medicine, Animal Health Department, Nationalestraat 155, B-2000 Antwerp, Belgium
| | - I. Phiri
- University of Zambia, School of Veterinary Medicine, South Africa
| | - D. Geysen
- Institute of Tropical Medicine, Animal Health Department, Nationalestraat 155, B-2000 Antwerp, Belgium
| | - J. Vercruysse
- Ghent University, Vakgroep Virologie, parasitologie en Immunologie, Salisburylaan 133, B-9820 Merelbeke, Belgium
| | - P. Van den Bossche
- Institute of Tropical Medicine, Animal Health Department, Nationalestraat 155, B-2000 Antwerp, Belgium
- Department of Veterinary Tropical Diseases, University of Pretoria, Onderstepoort, South Africa
- Corresponding author. Institute of Tropical Medicine, Animal Health Department, Nationalestraat 155, 2000 Antwerp, Belgium Tel.: +32 3 2476396; fax: +32 3 2476268.
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Abstract
A sero-epidemiological study of Taenia saginata cysticercosis was carried out in adult cattle in Zambia to determine the prevalence and study the influence of the farming system on the infection rate. Serum samples were examined for circulating parasite antigen by a monoclonal-based sandwich ELISA. Thirty-eight of 628 serum samples were found positive (prevalence 6.1%). Cysticercosis was significantly more prevalent in feedlots and in traditional farming systems than in dairy farms. It is suggested that the continuous man to animal contact and the use of casual workers in feedlots may be factors that are conductive to T. saginata transmission.
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Affiliation(s)
- P Dorny
- Department of Veterinary Medicine, Prince Leopold Institute of Tropical Medicine, Nationalestraat 155, B-2000 Antwerp, Belgium.
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