典型文献
Enhanced catalytic conversion of polysulfides using high-percentage 1T-phase metallic WS2 nanosheets for Li-S batteries
文献摘要:
High-energy-density lithium-sulfur batteries has attracted substantial attention as competitive candidates for large-scale energy storage technologies.Still,the adverse"shuttle effect"and sluggish sulfur conversion reaction kinetics immensely obstruct their commercial viability.Herein,a two-dimensional metallic 1T phase WS2(1T-WS2)nanosheets modified functional separator is developed to improve the electro-chemical performance.Meanwhile,the semiconducting bulk-WS2 crystals,and 2H phase WS2(2H-WS2)nanosheets with more basal-plane S-vacancy defects are also prepared to probe the contributions of the crystal structure(phase),S-vacancy defects,and edges to the Li-S batteries performance experimentally and theoretically.In merits of the synergistic effect of high ion and electron conductivity,enhanced binding ability to lithium polysulfides(LiPSs),and sufficient electrocatalytic active sites,the 1T-WS2 shows highly efficient electrocatalysis of LiPSs con-version and further improves Li-S battery performance.As expected,thus-fabricated cells with 1T-WS2 nanosheets present superior cycle stability that maintain capacity decline of 0.039%per cycle after 1000 cycles at 1.0 C.The strategy presented here offers a viable approach to reveal the critical factors for LiPSs catalytic conversion,which is beneficial to developing advanced Li-S batteries with enhanced properties.
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作者姓名:
Changyu Yang;Ning Gong;Tao Chen;Yang Li;Wenchao Peng;Fengbao Zhang;Xiaobin Fan
作者机构:
School of Chemical Engineering and Technology,State Key Laboratory of Chemical Engineering,Collaborative Innovation Center of Chemical Science and Engineering,Tianjin University,Tianjin,300072,China
文献出处:
引用格式:
[1]Changyu Yang;Ning Gong;Tao Chen;Yang Li;Wenchao Peng;Fengbao Zhang;Xiaobin Fan-.Enhanced catalytic conversion of polysulfides using high-percentage 1T-phase metallic WS2 nanosheets for Li-S batteries)[J].绿色能源与环境(英文),2022(06):1340-1348
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0.581925
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