Self-crystallized Interlayer Integrating Polysulfide-adsorbed TiO2/TiO and Highly-electron-conductive TiO for High-stability Lithium-sulfur Batteries

Xinzhe Yang; Tingting Qin; Xiaoyu Zhang; Xiaofei Liu; Zizhun Wang; Wei Zhang; Weitao Zheng

doi:10.1007/s40242-020-0310-0

Chemical Research in Chinese Universities ›› 2021, Vol. 37 ›› Issue (2) : 259 -264. DOI: 10.1007/s40242-020-0310-0

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Self-crystallized Interlayer Integrating Polysulfide-adsorbed TiO₂/TiO and Highly-electron-conductive TiO for High-stability Lithium-sulfur Batteries

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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 originated 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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Lithium sulfur battery / TiO₂/TiO / Carbon fiber paper

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Xinzhe Yang, Tingting Qin, Xiaoyu Zhang, Xiaofei Liu, Zizhun Wang, Wei Zhang, Weitao Zheng. Self-crystallized Interlayer Integrating Polysulfide-adsorbed TiO₂/TiO and Highly-electron-conductive TiO for High-stability Lithium-sulfur Batteries. Chemical Research in Chinese Universities, 2021, 37(2): 259-264 DOI:10.1007/s40242-020-0310-0

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