Self-crystallized Interlayer Integrating Polysulfide-adsorbed TiO2/TiO and Highly-electron-conductive TiO for High-stability Lithium-Sulfur Batteries |
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Authors: | YANG Xinzhe QIN Tingting ZHANG Xiaoyu LIU Xiaofei WANG Zizhun ZHANG Wei ZHENG Weitao |
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Institution: | Key Laboratory of Automobile Materials of Ministry of Education,School of Materials Science & Engineering,Electron Microscopy Center,Interna-tional Center of Future Science,Jilin University,Changchun 130012,P.R.China;Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science & Engineering, Electron Microscopy Center, International Center of Future Science, Jilin University, Changchun 130012, P.R.China;Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P.R.China;IKERBASQUE, Basque Foundation for Science, Bilbao 48013, Spain |
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Abstract: | Low-cost lithium sulfur(Li-S) batteries afford preeminent prospect as a next-generation high-energy storage device by virtue of great theoretical capacity. Nevertheless, their applications are restricted by some challenging technical barriers, such as weak cycling stability and low poor-conductivity sulfur loading ori-ginated in notorious shuttling effect of polysulfide intermediates. Herein, free of any complicated compositing process, we design an interlayer of carbon fiber paper supported TiO2/TiO to impede the shuttle effect and enhance the electrical conductivity via physical isolation and chemical adsorption. Such a self-crystallized homogeneous interlayer, where TiO2/TiO enables absorbing lithium polysulfides(LiPSs) and TiO plays a key role of high-electron-conductivity exhibited ultrahigh capacities(1000 mA·h/g at 0.5 C and 900 mA·h/g at 1 C) and outstanding capacity retention rate(97%) after 100 cycles. Thus, our design provides a simple route to suppress the shuttle effect via self-derived evolution Li-S batteries. |
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Keywords: | Lithium sulfur battery TiO2/TiO Carbon fiber paper |
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