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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.
文献关键词:
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
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
A类:
B类:
Enhanced,conversion,polysulfides,using,percentage,1T,phase,metallic,WS2,nanosheets,batteries,High,energy,density,lithium,sulfur,attracted,substantial,attention,competitive,candidates,large,scale,storage,technologies,Still,adverse,shuttle,effect,sluggish,reaction,kinetics,immensely,obstruct,their,commercial,viability,Herein,two,dimensional,modified,functional,separator,developed,chemical,performance,Meanwhile,semiconducting,bulk,crystals,2H,more,basal,plane,vacancy,defects,also,prepared,probe,contributions,structure,edges,experimentally,theoretically,In,merits,synergistic,electron,conductivity,enhanced,binding,LiPSs,sufficient,electrocatalytic,active,sites,shows,highly,efficient,electrocatalysis,further,improves,battery,expected,thus,fabricated,cells,superior,stability,that,maintain,capacity,decline,after,cycles,strategy,presented,here,offers,viable,approach,reveal,critical,factors,which,beneficial,developing,advanced,properties
AB值:
0.581925
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