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Sun J, Zhang L, Gong S, Chen J, Guo H. Mechano-Driven Tribo-Electrophoresis Enabled Human-Droplet Interaction in 3D Space. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2305578. [PMID: 37477978 DOI: 10.1002/adma.202305578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/13/2023] [Indexed: 07/22/2023]
Abstract
Electronically controlled droplet manipulation has widespread applications in biochemistry, life sciences, and industry. However, current technologies such as electrowetting, electrostatics, and surface charge printing rely on complex electrode arrays and external power supplies, leading to inefficient manipulation. In light of these limitations, a novel method is proposed, which leverages tribo-electrophoresis (TEP) to pipette in an oil medium, thereby enabling human-droplet interactions to be constructed with greater efficiency. The approach involves the rational design of a triboelectric nanogenerator-electrostatic tweezer that generates an electric field to charge the droplet and improves the maneuverability of the charged droplet, including aligned/non-aligned pipetting and stable transport in the clamped state, which can be accomplished solely by hand motion. The TEP method not only provides droplets with freedom to move in three dimensions but also offers a feasibility case for chemical reactions in the liquid phase and non-invasive sample extraction. This breakthrough establishes a cornerstone for human-droplet interactions capitalized on triboelectric nanogenerators, opening new avenues for research in droplet manipulation.
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Affiliation(s)
- Jianfeng Sun
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 400044, China
| | - Lingjun Zhang
- Department of Physics, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Siqi Gong
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing, 400044, China
| | - Jie Chen
- College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing, 401331, China
| | - Hengyu Guo
- State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, 400044, China
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2
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Shi F, Guo X, Chen C, Zhuang L, Yu J, Qi Q, Zhu Y, Xu ZL, Lau SP. Unlocking Liquid Sulfur Chemistry for Fast-Charging Lithium-Sulfur Batteries. NANO LETTERS 2023; 23:7906-7913. [PMID: 37619971 PMCID: PMC10510576 DOI: 10.1021/acs.nanolett.3c01633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/02/2023] [Indexed: 08/26/2023]
Abstract
A recent study of liquid sulfur produced in an electrochemical cell has prompted further investigation into regulating Li-S oxidation chemistry. In this research, we examined the liquid-to-solid sulfur transition dynamics by visually observing the electrochemical generation of sulfur on a graphene-based substrate. We investigated the charging of polysulfides at various current densities and discovered a quantitative correlation between the size and number density of liquid sulfur droplets and the applied current. However, the areal capacities exhibited less sensitivity. This observation offers valuable insights for designing fast-charging sulfur cathodes. By incorporating liquid sulfur into Li-S batteries with a high sulfur loading of 4.2 mg cm-2, the capacity retention can reach ∼100%, even when increasing the rate from 0.1 to 3 C. This study contributes to a better understanding of the kinetics involved in the liquid-solid sulfur growth in Li-S chemistry and presents viable strategies for optimizing fast-charging operations.
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Affiliation(s)
- Fangyi Shi
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
- Research
Institute for Smart Energy, The Hong Kong
Polytechnic University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Xuyun Guo
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Chunhong Chen
- State
Key Laboratory of Ultraprecision Machining Technology, Department
of Industrial and Systems Engineering, The
Hong Kong Polytechnic University, Hung
Hom, Hong Kong 999077, People’s Republic of China
| | - Lyuchao Zhuang
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Jingya Yu
- State
Key Laboratory of Ultraprecision Machining Technology, Department
of Industrial and Systems Engineering, The
Hong Kong Polytechnic University, Hung
Hom, Hong Kong 999077, People’s Republic of China
| | - Qi Qi
- State
Key Laboratory of Ultraprecision Machining Technology, Department
of Industrial and Systems Engineering, The
Hong Kong Polytechnic University, Hung
Hom, Hong Kong 999077, People’s Republic of China
| | - Ye Zhu
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
- Research
Institute for Smart Energy, The Hong Kong
Polytechnic University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Zheng-Long Xu
- State
Key Laboratory of Ultraprecision Machining Technology, Department
of Industrial and Systems Engineering, The
Hong Kong Polytechnic University, Hung
Hom, Hong Kong 999077, People’s Republic of China
- Research
Center of Deep Space Exploration, The Hong
Kong Polytechnic University, Hung Hom, Hong Kong 999077, People’s Republic of China
| | - Shu Ping Lau
- Department
of Applied Physics, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong 999077, People’s Republic of China
- Research
Institute for Smart Energy, The Hong Kong
Polytechnic University, Hung Hom, Hong Kong 999077, People’s Republic of China
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Liu L, Huang S, Shi W, Sun X, Pang J, Lu Q, Yang Y, Xi L, Deng L, Oswald S, Yin Y, Liu L, Ma L, Schmidt OG, Shi Y, Zhang L. Single "Swiss-roll" microelectrode elucidates the critical role of iron substitution in conversion-type oxides. SCIENCE ADVANCES 2022; 8:eadd6596. [PMID: 36542707 PMCID: PMC9770940 DOI: 10.1126/sciadv.add6596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 11/18/2022] [Indexed: 06/17/2023]
Abstract
Advancing the lithium-ion battery technology requires the understanding of electrochemical processes in electrode materials with high resolution, accuracy, and sensitivity. However, most techniques today are limited by their inability to separate the complex signals from slurry-coated composite electrodes. Here, we use a three-dimensional "Swiss-roll" microtubular electrode that is incorporated into a micrometer-sized lithium battery. This on-chip platform combines various in situ characterization techniques and precisely probes the intrinsic electrochemical properties of each active material due to the removal of unnecessary binders and additives. As an example, it helps elucidate the critical role of Fe substitution in a conversion-type NiO electrode by monitoring the evolution of Fe2O3 and solid electrolyte interphase layer. The markedly enhanced electrode performances are therefore explained. Our approach exposes a hitherto unexplored route to tracking the phase, morphology, and electrochemical evolution of electrodes in real time, allowing us to reveal information that is not accessible with bulk-level characterization techniques.
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Affiliation(s)
- Lixiang Liu
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
- Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany
- Research Center for Materials, Architectures and Integration of Nanomembranes (MAIN), Technische Universität Chemnitz, Rosenbergstraße 6, 09126 Chemnitz, Germany
| | - Shaozhuan Huang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, South-Central Minzu University, 430074 Wuhan, China
| | - Wujun Shi
- Center for Transformative Science, ShanghaiTech University, 201210 Shanghai, China
| | - Xiaolei Sun
- Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany
- School of Materials Science and Engineering, Nankai University, 300350 Tianjin, China
| | - Jinbo Pang
- Institute for Complex Materials, IFW Dresden, 01069 Dresden, Germany
| | - Qiongqiong Lu
- Institute for Complex Materials, IFW Dresden, 01069 Dresden, Germany
| | - Ye Yang
- Center for Advancing Electronics Dresden and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
| | - Lixia Xi
- Institute for Complex Materials, IFW Dresden, 01069 Dresden, Germany
| | - Liang Deng
- Institute for Complex Materials, IFW Dresden, 01069 Dresden, Germany
| | - Steffen Oswald
- Institute for Complex Materials, IFW Dresden, 01069 Dresden, Germany
| | - Yin Yin
- Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany
| | - Lifeng Liu
- Clean Energy Cluster, International Iberian Nanotechnology Laboratory (INL), 4715-330 Braga, Portugal
| | - Libo Ma
- Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany
| | - Oliver G. Schmidt
- Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany
- Research Center for Materials, Architectures and Integration of Nanomembranes (MAIN), Technische Universität Chemnitz, Rosenbergstraße 6, 09126 Chemnitz, Germany
- Nanophysics, Faculty of Physics, Technische Universität Dresden, 01062 Dresden, Germany
| | - Yumeng Shi
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Lin Zhang
- Institut für Festkörperphysik, Leibniz Universität Hannover, D-30167 Hannover, Germany
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4
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Shi F, Onofrio N, Chen C, Cai S, Li Y, Zhai L, Zhuang L, Xu ZL, Lau SP. Stable Liquid-Sulfur Generation on Transition-Metal Dichalcogenides toward Low-Temperature Lithium-Sulfur Batteries. ACS NANO 2022; 16:14412-14421. [PMID: 36001112 DOI: 10.1021/acsnano.2c04769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The electrochemical formation of liquid sulfur at room temperature on the basal plane of MoS2 has attracted much attention due to the high areal capacity and rapid kinetics of lithium-liquid sulfur chemistry. However, the liquid sulfur is converted to the solid phase once it contacts the solid sulfur crystals generated from the edge of MoS2. Thus, stable liquid sulfur cannot be formed on the entire MoS2 surface. Herein, we report entire liquid sulfur generation on hydrogen-annealed MoS2 (H2-MoS2), even under harsh conditions of large overpotentials and low working temperatures. The origins of the solely liquid sulfur formation are revealed to be the weakened interactions between H2-MoS2 and sulfur molecules and the decreased electrical polarization on the edges of the H2-MoS2. Progressive nucleation and droplet-merging growth behaviors are observed during the sulfur formation on H2-MoS2, signifying high areal capacities by releasing active H2-MoS2 surfaces. To demonstrate the universality of this strategy, other transition-metal dichalcogenides (TMDs) annealed in hydrogen also exhibit similar sulfur growth behaviors. Furthermore, the H2 annealing treatment can induce sulfur vacancies on the basal plane and partial oxidation on the edge of TMDs, which facilitates liquid sulfur formation. Finally, liquid sulfur can be generated on H2-MoS2 flakes at an ultralow temperature of -50 °C, which provides a possible development of low-temperature lithium-sulfur batteries. This work demonstrates the potential of a pure liquid sulfur-lithium electrochemical system using functionalized two-dimensional materials.
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Affiliation(s)
- Fangyi Shi
- Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
| | - Nicolas Onofrio
- Institut Européen des Membranes, IEM, UMR 5635, Univeristé Montpellier, ENSCM, CNRS, Montpellier 34000, France
| | - Chunhong Chen
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
| | - Songhua Cai
- Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
| | - Yanyong Li
- Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
| | - Lingling Zhai
- Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
| | - Lyuchao Zhuang
- Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
| | - Zheng-Long Xu
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
- State Key Laboratory of Ultraprecision Machining Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
- Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, People's Republic of China
| | - Shu Ping Lau
- Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, People's Republic of China
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5
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Bobkova V, Trinschek S, Otte E, Denz C. Analyzing light-structuring features of droplet lenses on liquid-repelling surfaces. OPTICS EXPRESS 2022; 30:5937-5952. [PMID: 35209545 DOI: 10.1364/oe.444777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
The complete understanding of the formation of seemingly levitating droplets on liquid-repelling surfaces provides the basis for further development of applications requiring friction-free liquid transport. For the investigation of these droplets and, thereby, the underlying surface properties, standard techniques typically only reveal a fraction of droplet or surface information. Here, we propose to exploit the light-shaping features of liquid droplets when interpreted as thick biconvex elliptical lenses. This approach has the potential to decode a plethora of droplet information from a passing laser beam, by transforming the information into a structured light field. Here, we explore this potential by analyzing the three-dimensional intensity structures sculpted by the droplet lenses, revealing the transfer of the characteristics of the underlying liquid-repelling effect onto the light field. As illustrative complementary examples, we study droplet lenses formed on a non-wetting Taro (Colocasia esculenta) leaf surface and by the Leidenfrost effect on a heated plate. Our approach may reveal even typically "invisible" droplet properties as the refractive index or internal flow dynamics and, hence, will be of interest to augment conventional tools for droplet and surface investigation.
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6
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Yan T, Wu Y, Gong F, Cheng C, Yang H, Mao J, Dai K, Cheng L, Cheng T, Zhang L. TiH 2 Nanodots Exfoliated via Facile Sonication as Bifunctional Electrocatalysts for Li-S Batteries. ACS APPLIED MATERIALS & INTERFACES 2022; 14:6937-6944. [PMID: 35080867 DOI: 10.1021/acsami.1c23815] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Mediating the redox kinetics of polysulfides is a promising strategy to mitigate the shuttling and sluggish conversion of polysulfides for practical application of lithium-sulfur (Li-S) batteries. Herein, novel TiH2 nanodots (THNDs) fabricated by sonication-assisted liquid-phase exfoliation are used as bifunctional electrocatalysts for Li-S batteries. Both experimental and theoretical results reveal that THNDs can not only provide a strong chemical affinity to polysulfides but also bidirectionally promote the precipitation/decomposition of Li2S from/to polysulfides during the discharge/charge process, thus effectively suppressing the shuttle effect and improving the redox kinetics of polysulfides. Owing to these advantages accompanied by the abundant catalytically active sites of THNDs, the assembled Li-S batteries deliver a low capacity fading rate of 0.055% per cycle over 1000 cycles at 1C and a high areal capacity of 5.38 mAh cm-2 after 50 cycles with a high sulfur loading of 8.5 mg cm-2. This work demonstrates the great potential of utilizing functional metal hydrides as effective electrocatalysts for Li-S batteries, which will incite more investigation into the specific selection of metal compounds to boost the redox kinetics of polysulfides.
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Affiliation(s)
- Tianran Yan
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, China
| | - Yu Wu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, China
| | - Fei Gong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, China
| | - Chen Cheng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, China
| | - Hao Yang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, China
| | - Jing Mao
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Kehua Dai
- College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Liang Cheng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, China
| | - Tao Cheng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, China
| | - Liang Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou 215123, Jiangsu, China
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Wang H, Du X, Li J, Zhang Z, Liu G. CoSn Alloy-based three-dimensional ordered multistage porous composite towards effective polysulfide confinement and catalytic conversion in lithium‐sulfur batteries. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139644] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Qiu J, Wu S, Yang Y, Xiao H, Wei X, Zhang B, Hui KN, Lin Z. Aqueous Supramolecular Binder for a Lithium-Sulfur Battery with Flame-Retardant Property. ACS APPLIED MATERIALS & INTERFACES 2021; 13:55092-55101. [PMID: 34762400 DOI: 10.1021/acsami.1c16650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A lithium-sulfur (Li-S) battery based on multielectron chemical reactions is considered as a next-generation energy-storage device because of its ultrahigh energy density. However, practical application of a Li-S battery is limited by the large volume changes, insufficient ion conductivity, and undesired shuttle effect of its sulfur cathode. To address these issues, an aqueous supramolecular binder with multifunctions is developed by cross-linking sericin protein (SP) and phytic acid (PA). The combination of SP and PA allows one to control the volume change of the sulfur cathode, benefit soluble polysulfides absorbing, and facilitate transportation of Li+. Attributed to the above merits, a Li-S battery with the SP-PA binder exhibits a remarkable cycle performance improvement of 200% and 120% after 100 cycles at 0.2 C compared with Li-S batteries with PVDF and SP binders. In particular, the SP-PA binder in the electrode displays admirable flame-retardant performance due to formation of an isolating layer and the release of radicals.
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Affiliation(s)
- Juncheng Qiu
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Shuxing Wu
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Yajun Yang
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Huayan Xiao
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Xiujuan Wei
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Bingkai Zhang
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Kwun Nam Hui
- Institute of Applied Physics and Materials Engineering, University of Macau, , Avenida da Universidade, Taipa, Macao Special Administrative Region 999078, China
| | - Zhan Lin
- Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
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Xie P, Zhang B, Zhou Y, Li P, Tian X. A dual-coated multifunctional separator for the high-performance lithium-sulfur batteries. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Xu J, Yang L, Cao S, Wang J, Ma Y, Zhang J, Lu X. Sandwiched Cathodes Assembled from CoS 2 -Modified Carbon Clothes for High-Performance Lithium-Sulfur Batteries. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2101019. [PMID: 34075724 PMCID: PMC8373102 DOI: 10.1002/advs.202101019] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/09/2021] [Indexed: 05/06/2023]
Abstract
Structural design of advanced cathodes is a promising strategy to suppress the shuttle effect for lithium-sulfur batteries (LSBs). In this work, the carbon cloth covered with CoS2 nanoparticles (CC-CoS2 ) is prepared to function as both three-dimensional (3D) current collector and physicochemical barrier to retard migration of soluble lithium polysulfides. On the one hand, the CC-CoS2 film works as a robust 3D current collector and host with high conductivity, high sulfur loading, and high capability of capturing polysulfides. On the other hand, the 3D porous CC-CoS2 film serves as a multifunctional interlayer that exhibits efficient physical blocking, strong chemisorption, and fast catalytic redox reaction kinetics toward soluble polysulfides. Consequently, the Al@S/AB@CC-CoS2 cell with a sulfur loading of 1.2 mg cm-2 exhibits a high rate capability (≈823 mAh g-1 at 4 C) and delivers excellent capacity retention (a decay of ≈0.021% per cycle for 1000 cycles at 4 C). Moreover, the sandwiched cathode of CC-CoS2 @S/AB@CC-CoS2 is designed for high sulfur loading LSBs. The CC-CoS2 @S/AB@CC-CoS2 cells with sulfur loadings of 4.2 and 6.1 mg cm-2 deliver high reversible capacities of 1106 and 885 mAh g-1 , respectively, after 100 cycles at 0.2 C. The outstanding electrochemical performance is attributed to the sandwiched structure with active catalytic component.
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Affiliation(s)
- Jun Xu
- School of MicroelectronicsHefei University of TechnologyHefei230009P. R. China
| | - Likun Yang
- School of MicroelectronicsHefei University of TechnologyHefei230009P. R. China
| | - Shoufu Cao
- School of Materials Science and EngineeringChina University of PetroleumQingdaoShandong266580P. R. China
| | - Jingwen Wang
- School of MicroelectronicsHefei University of TechnologyHefei230009P. R. China
| | - Yuanming Ma
- School of MicroelectronicsHefei University of TechnologyHefei230009P. R. China
| | - Junjun Zhang
- School of Physics and Materials EngineeringHefei Normal UniversityHefei230601P.R. China
| | - Xiaoqing Lu
- School of Materials Science and EngineeringChina University of PetroleumQingdaoShandong266580P. R. China
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