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Jung S, Seo JK, Jang IC, Kim J, Shim JH, Woo JJ. Development and Verification of a Diagnostic Technology for Waste Battery Deterioration Factors. Chemphyschem 2023; 24:e202300438. [PMID: 37665230 DOI: 10.1002/cphc.202300438] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/28/2023] [Accepted: 08/28/2023] [Indexed: 09/05/2023]
Abstract
We defined four major deterioration factors (electrolyte loss (EL), lithium loss (LL), lithium precipitation (LP), and compound deterioration (CD)). Then, we derived eleven key performance indicators (KPIs) for comparative analysis. After that, we fabricated three deteriorated cells for each of three deterioration factors (EL, LL, and LP) and one cell with CD (for verification) with four individual (dis)charging experiment manuals. The two major contributions of this study are the performance of 1) trend analysis to determine a suitable diagnostic metric by inspecting the eleven KPIs and 2) comparison analysis ofV o c v , t ' ' ${{V}_{ocv,t}^{{ {^\prime} {^\prime}}}}$ andV o c v , t , s i m ' ' ${{V}_{ocv,t,sim}^{{ {^\prime} {^\prime}}}}$ to verify the effectiveness of utilizingV o c v , t ' ' ${{V}_{ocv,t}^{{ {^\prime} {^\prime}}}}$ as a real-time deterioration diagnostic factor using a concept of model-in-the-loop simulation. The results show that 1)V o c v , t ' ' ${{V}_{ocv,t}^{{ {^\prime} {^\prime}}}}$ has the most conspicuous trendline tendency among the eleven comparison targets for all four major deterioration factors, and 2) the angle difference between the two trends ofV o c v , t ' ' ${{V}_{ocv,t}^{{ {^\prime} {^\prime}}}}$ andV o c v , t , s i m ' ' ${{V}_{ocv,t,sim}^{{ {^\prime} {^\prime}}}}$ lies within a minimum of 9° and a maximum of 43° (with a10 4 ${{10}^{4}}$ sscale on the x-axis and a10 - 7 ${{10}^{-7}}$ scale on the y-axis for a clear trend line analysis). From this, we can conclude that the trendline-based real-time deterioration analysis employingV o c v , t ' ' ${{V}_{ocv,t}^{{ {^\prime} {^\prime}}}}$ may be practically applicable to a limited extent.
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Affiliation(s)
- Sunghun Jung
- Faculty of Smart Vehicle System Engineering, Chosun University, 101, Chosundae 2-gil, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Joon Kyo Seo
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research, 25, Samso-ro 270 beon-gil, Buk-gu, Gwangju, 61003, Republic of Korea
| | - Il-Chan Jang
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research, 25, Samso-ro 270 beon-gil, Buk-gu, Gwangju, 61003, Republic of Korea
| | - Jihun Kim
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research, 25, Samso-ro 270 beon-gil, Buk-gu, Gwangju, 61003, Republic of Korea
| | - Jae-Hyun Shim
- Faculty of Battery Science and Engineering, Dongshin University, 67, Dongsindae-gil, Naju-si, Jeollanam-do, 58245, Republic of Korea
| | - Jung-Je Woo
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research, 25, Samso-ro 270 beon-gil, Buk-gu, Gwangju, 61003, Republic of Korea
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Kim J, Jang JS, Shin SW, Park H, Jeong WL, Mun SH, Min JH, Ma J, Heo J, Lee DS, Woo JJ, Kim JH, Kim HJ. Novel Mg- and Ga-doped ZnO/Li-Doped Graphene Oxide Transparent Electrode/Electron-Transporting Layer Combinations for High-Performance Thin-Film Solar Cells. Small 2023; 19:e2207966. [PMID: 36861366 DOI: 10.1002/smll.202207966] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/09/2023] [Indexed: 06/02/2023]
Abstract
Herein, a novel combination of Mg- and Ga-co-doped ZnO (MGZO)/Li-doped graphene oxide (LGO) transparent electrode (TE)/electron-transporting layer (ETL) has been applied for the first time in Cu2 ZnSn(S,Se)4 (CZTSSe) thin-film solar cells (TFSCs). MGZO has a wide optical spectrum with high transmittance compared to that with conventional Al-doped ZnO (AZO), enabling additional photon harvesting, and has a low electrical resistance that increases electron collection rate. These excellent optoelectronic properties significantly improved the short-circuit current density and fill factor of the TFSCs. Additionally, the solution-processable alternative LGO ETL prevented plasma-induced damage to chemical bath deposited cadmium sulfide (CdS) buffer, thereby enabling the maintenance of high-quality junctions using a thin CdS buffer layer (≈30 nm). Interfacial engineering with LGO improved the Voc of the CZTSSe TFSCs from 466 to 502 mV. Furthermore, the tunable work function obtained through Li doping generated a more favorable band offset in CdS/LGO/MGZO interfaces, thereby, improving the electron collection. The MGZO/LGO TE/ETL combination achieved a power conversion efficiency of 10.67%, which is considerably higher than that of conventional AZO/intrinsic ZnO (8.33%).
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Affiliation(s)
- Jihun Kim
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research (KIER), 270-25 Samso-ro, Gwangju, 61003, South Korea
| | - Jun Sung Jang
- Optoelectronic Convergence Research Center, Department of Materials Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
| | - Seung Wook Shin
- Future Agricultural Research Division, Water Resource and Environment Research Group, Rural Research Institute, Korea Rural Community Corporation, Ansan-Si, 15634, South Korea
| | - Hyeonghun Park
- Graduate School of Energy Convergence, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
| | - Woo-Lim Jeong
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
| | - Seung-Hyun Mun
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
| | - Jung-Hong Min
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
| | - Jiyoung Ma
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research (KIER), 270-25 Samso-ro, Gwangju, 61003, South Korea
| | - Jaeyeong Heo
- Optoelectronic Convergence Research Center, Department of Materials Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
| | - Dong Seon Lee
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
| | - Jung-Je Woo
- Gwangju Clean Energy Research Center, Korea Institute of Energy Research (KIER), 270-25 Samso-ro, Gwangju, 61003, South Korea
| | - Jin Hyeok Kim
- Optoelectronic Convergence Research Center, Department of Materials Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
| | - Hyeong-Jin Kim
- Graduate School of Energy Convergence, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
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Abstract
Despite its excellent public healthcare system and efficient public administration, Singapore has been severely affected by the COVID-19 pandemic. While fatalities in the city-state remain low and contact tracing efforts have been largely successful, it has nonetheless experienced high rates of infection and the emergence of large infection clusters in its foreign worker dormitories. This paper analyses this dual-track policy outcome - low fatalities but high infection rates - from a policy capacity perspective. Specifically, the policy capacities that had contributed to Singapore's low fatality rates and effective contact tracing are identified while the capacity deficiencies that may have caused its high rates of infection are discussed. In doing so, I argue that the presence of fiscal, operational and political capacities that were built up after the SARS crisis had contributed to Singapore's low fatality rate and contact tracing capabilities while deficiencies in analytical capacities may explain its high infection rate.
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Woo JJ, Johnson ME, Kahn BS. 17 Years of Fellowship in Minimally Invasive Gynecologic Surgery (FMIGS): Where are Graduates Now? J Minim Invasive Gynecol 2019. [DOI: 10.1016/j.jmig.2019.09.558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Woo JJ, Johnson ME, Kahn BS. 1988 Improving the Utility of The Manufacturer and User Facility Device Experience (MAUDE) Database: Using Categorization of Device Events to Compare Uterine Endometrial Ablation Devices. J Minim Invasive Gynecol 2019. [DOI: 10.1016/j.jmig.2019.09.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kim CK, Kim K, Shin K, Woo JJ, Kim S, Hong SY, Choi NS. Synergistic Effect of Partially Fluorinated Ether and Fluoroethylene Carbonate for High-Voltage Lithium-Ion Batteries with Rapid Chargeability and Dischargeability. ACS Appl Mater Interfaces 2017; 9:44161-44172. [PMID: 29182242 DOI: 10.1021/acsami.7b12352] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The roles of a partially fluorinated ether (PFE) based on a mixture of 1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxybutane and 2-(difluoro(methoxy)methyl)-1,1,1,2,3,3,3-heptafluoropropane on the oxidative durability of an electrolyte under high-voltage conditions, the rate capability of the graphite and 5 V-class LiNi0.4Mn1.6O4 (LNMO) electrodes, and the cycling performance of graphite/LNMO full cells are examined. Our findings indicate that the use of PFE as a cosolvent in the electrolyte yields thermally stable electrolytes with self-extinguishing ability. Electrochemical tests confirm that the PFE combined with fluoroethylene carbonate (FEC) effectively alleviates the oxidative decomposition of the electrolyte at the high-voltage LNMO cathode and enables reversible electrochemical reactions of the graphite anodes and LNMO cathodes at high rates. Moreover, the combination of PFE, which mitigates electrolyte decomposition at high voltages, and FEC, which stabilizes the anode-electrolyte interface, enables the reversible cycling of high-voltage full cells (graphite/LNMO) with a capacity retention of 70.3% and a high Coulombic efficiency of 99.7% after 100 cycles at 1C rate at 30 °C.
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Affiliation(s)
- Choon-Ki Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Koeun Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Kyomin Shin
- Research & Development Division, Hyundai Motor Company , 772-1, Jangduk-dong, Hwaseong-si 445-706, Gyeonggi-do, Republic of Korea
| | - Jung-Je Woo
- Research & Development Division, Hyundai Motor Company , 772-1, Jangduk-dong, Hwaseong-si 445-706, Gyeonggi-do, Republic of Korea
| | - Saheum Kim
- Research & Development Division, Hyundai Motor Company , 772-1, Jangduk-dong, Hwaseong-si 445-706, Gyeonggi-do, Republic of Korea
| | - Sung You Hong
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Nam-Soon Choi
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil, Ulsan 689-798, Republic of Korea
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Kim CK, Shin DS, Kim KE, Shin K, Woo JJ, Kim S, Hong SY, Choi NS. Inside Cover: Fluorinated Hyperbranched Cyclotriphosphazene Simultaneously Enhances the Safety and Electrochemical Performance of High-Voltage Lithium-Ion Batteries (ChemElectroChem 6/2016). ChemElectroChem 2016. [DOI: 10.1002/celc.201600224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Choon-Ki Kim
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
| | - Dong-Seon Shin
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
| | - Ko-Eun Kim
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
| | - Kyomin Shin
- Research & Development Division; Hyundai Motor Company, 772-1, Jangduk-dong, Hwaseong-si; Gyeonggi-do 445-706 South Korea
| | - Jung-Je Woo
- Research & Development Division; Hyundai Motor Company, 772-1, Jangduk-dong, Hwaseong-si; Gyeonggi-do 445-706 South Korea
| | - Saheum Kim
- Research & Development Division; Hyundai Motor Company, 772-1, Jangduk-dong, Hwaseong-si; Gyeonggi-do 445-706 South Korea
| | - Sung You Hong
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
| | - Nam-Soon Choi
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
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Kim CK, Shin DS, Kim KE, Shin K, Woo JJ, Kim S, Hong SY, Choi NS. Fluorinated Hyperbranched Cyclotriphosphazene Simultaneously Enhances the Safety and Electrochemical Performance of High-Voltage Lithium-Ion Batteries. ChemElectroChem 2016. [DOI: 10.1002/celc.201600025] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Choon-Ki Kim
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
| | - Dong-Seon Shin
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
| | - Ko-Eun Kim
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
| | - Kyomin Shin
- Research & Development Division; Hyundai Motor Company, 772-1, Jangduk-dong, Hwaseong-si; Gyeonggi-do 445-706 South Korea
| | - Jung-Je Woo
- Research & Development Division; Hyundai Motor Company, 772-1, Jangduk-dong, Hwaseong-si; Gyeonggi-do 445-706 South Korea
| | - Saheum Kim
- Research & Development Division; Hyundai Motor Company, 772-1, Jangduk-dong, Hwaseong-si; Gyeonggi-do 445-706 South Korea
| | - Sung You Hong
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
| | - Nam-Soon Choi
- School of Energy and Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798 South Korea
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Woo JJ, Nam SH, Seo SJ, Yun SH, Kim WB, Xu T, Moon SH. A flame retarding separator with improved thermal stability for safe lithium-ion batteries. Electrochem commun 2013. [DOI: 10.1016/j.elecom.2013.08.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Yun SH, Oh SH, Woo JJ, Lee JY, Lee JH, Lee SB, Min CM, Lee J, Lee JS, Moon SH. End-group cross-linked large-size composite membranes via a lab-made continuous caster: enhanced oxidative stability and scale-up feasibility in a 50 cm2 single-cell and a 220 W class 5-cell PEFC stack. RSC Adv 2013. [DOI: 10.1039/c3ra44089c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Seo SJ, Yun SH, Woo JJ, Park DW, Kang MS, Hinsch A, Moon SH. Preparation and characterization of quasi-solid-state electrolytes using a brominated poly(2,6-dimethyl-1,4-phenylene oxide) electrospun nanofiber mat for dye-sensitized solar cells. Electrochem commun 2011. [DOI: 10.1016/j.elecom.2011.08.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Xu T, Wu D, Seo SJ, Woo JJ, Wu L, Moon SH. Proton exchange composite membranes from blends of brominated and sulfonated poly(2,6-dimethyl-1,4-phenylene oxide). J Appl Polym Sci 2011. [DOI: 10.1002/app.35494] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ji E, Moon H, Piao J, Ha PT, An J, Kim D, Woo JJ, Lee Y, Moon SH, Rittmann BE, Chang IS. Interface resistances of anion exchange membranes in microbial fuel cells with low ionic strength. Biosens Bioelectron 2011; 26:3266-71. [DOI: 10.1016/j.bios.2010.12.039] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Revised: 12/03/2010] [Accepted: 12/27/2010] [Indexed: 10/18/2022]
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Yun SH, Woo JJ, Seo SJ, Wu L, Wu D, Xu T, Moon SH. Sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (SPPO) electrolyte membranes reinforced by electrospun nanofiber porous substrates for fuel cells. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2010.11.017] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wu L, Huang C, Woo JJ, Wu D, Yun SH, Seo SJ, Xu T, Moon SH. Modifying a Proton Conductive Membrane by Embedding a “Barrier”. J Phys Chem B 2010; 114:13121-7. [DOI: 10.1021/jp104514t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liang Wu
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712, Republic of Korea
| | - Chuanhui Huang
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712, Republic of Korea
| | - Jung-Je Woo
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712, Republic of Korea
| | - Dan Wu
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712, Republic of Korea
| | - Sung-Hyun Yun
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712, Republic of Korea
| | - Seok-Jun Seo
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712, Republic of Korea
| | - Tongwen Xu
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712, Republic of Korea
| | - Seung-Hyeon Moon
- CAS Key Laboratory of Soft Matter Chemistry, Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712, Republic of Korea
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Wu D, Wu L, Woo JJ, Yun SH, Seo SJ, Xu T, Moon SH. A simple heat treatment to prepare covalently crosslinked membranes from sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) for application in fuel cells. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2009.10.052] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Seo SJ, Woo JJ, Yun SH, Lee HJ, Park JS, Xu T, Yang TH, Lee J, Moon SH. Analyses of interfacial resistances in a membrane-electrode assembly for a proton exchange membrane fuel cell using symmetrical impedance spectroscopy. Phys Chem Chem Phys 2010; 12:15291-300. [DOI: 10.1039/c0cp00662a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wu L, Huang C, Woo JJ, Wu D, Yun SH, Seo SJ, Xu T, Moon SH. Hydrogen Bonding: A Channel for Protons to Transfer through Acid−Base Pairs. J Phys Chem B 2009; 113:12265-70. [PMID: 19685918 DOI: 10.1021/jp905778t] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liang Wu
- Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712 Republic of Korea
| | - Chuanhui Huang
- Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712 Republic of Korea
| | - Jung-Je Woo
- Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712 Republic of Korea
| | - Dan Wu
- Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712 Republic of Korea
| | - Sung-Hyun Yun
- Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712 Republic of Korea
| | - Seok-Jun Seo
- Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712 Republic of Korea
| | - Tongwen Xu
- Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712 Republic of Korea
| | - Seung-Hyeon Moon
- Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China, and Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 500-712 Republic of Korea
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Shim J, Kim GY, Yeon KH, Cho SH, Woo JJ, Moon SH. Degradation of azo dye by an electroenzymatic method using horseradish peroxidase immobilized on porous support. KOREAN J CHEM ENG 2007. [DOI: 10.1007/s11814-007-5012-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Park JS, Choi JH, Woo JJ, Moon SH. An electrical impedance spectroscopic (EIS) study on transport characteristics of ion-exchange membrane systems. J Colloid Interface Sci 2006; 300:655-62. [PMID: 16730020 DOI: 10.1016/j.jcis.2006.04.040] [Citation(s) in RCA: 130] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2006] [Accepted: 04/14/2006] [Indexed: 11/17/2022]
Abstract
This study aimed at investigating ion-exchange membrane systems using impedance spectroscopy. Nyquist plots showed that the impedance obtained in this study described the ion-exchange membrane system well, as consisting of (i) an ion-exchange membrane immersed in solution, (ii) electrical double layers at the membrane surface, and (iii) diffusion boundary layers arising from the interface between the ion-exchange membrane and the electrolyte solutions. Taking into account the physical and electrochemical understanding of the ion-exchange membrane system, an equivalent circuit was suggested to quantitatively analyze each component of the ion-exchange membrane system. To confirm the reliability of the proposed equivalent circuit, the resistance and capacitance were estimated from the impedance data and the values were compared with other experimental results (e.g., I-V curves). The comparison showed good agreement and validated the equivalent circuit. Moreover, the impedance measurements made it possible to confirm the electroconvective effects in the over LCD region.
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Affiliation(s)
- Jin-Soo Park
- Polymer Electrolyte Fuel Cell Research Group, New Energy Research Department, Korea Institute of Energy Research, Yusong-gu, Daejeon 305-343, Republic of Korea
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Liu WC, Kwak BK, Kim KN, Kim SY, Woo JJ, Chung DJ, Hong JH, Kim HS, Lee CJ, Shim HJ. Tuberculous aneurysm of the abdominal aorta: endovascular repair using stent grafts in two cases. Korean J Radiol 2000; 1:215-8. [PMID: 11752958 PMCID: PMC2718204 DOI: 10.3348/kjr.2000.1.4.215] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Tuberculous aneurysm of the aorta is exceedingly rare. To date, the standard therapy for mycotic aneurysm of the abdominal aorta has been surgery involving in-situ graft placement or extra-anatomic bypass surgery followed by effective anti-tuberculous medication. Only recently has the use of a stent graft in the treatment of tuberculous aortic aneurysm been described in the literature. We report two cases in which a tuberculous aneurysm of the abdominal aorta was successfully repaired using endovascular stent grafts. One case involved is a 42-year-old woman with a large suprarenal abdominal aortic aneurysm and a right psoas abscess, and the other, a 41-year-old man in whom an abdominal aortic aneurysm ruptured during surgical drainage of a psoas abscess.
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Affiliation(s)
- W C Liu
- Department of Radiology, Sung-Ae General Hospital, Seoul, Korea.
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