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Bi2S3 spheres coated with MOF-derived Co9S8 and N-doped carbon composite layer for half/full sodium-ion batteries with superior performance 认领 引用 被引量：4
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作者 Youzhang Huang Xueshuang Zhu +3 位作者 Daoping Cai Zhixiang Cui Qianting Wang Hongbing Zhan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第8期473-481,I0010,共9页
Bismuth sulfide(Bi2S3)has attracted particular interest as a potential anode material for sodium-ion batteries(SIBs).However,the low electrical conductivity and dramatic volumetric change greatly restrict its pr... Bismuth sulfide(Bi2S3)has attracted particular interest as a potential anode material for sodium-ion batteries(SIBs).However,the low electrical conductivity and dramatic volumetric change greatly restrict its practical applications.In view of the apparent structural and compositional advantages of metal-organic frameworks(MOFs)derived carbon-based composite,herein,as a proof of concept,Bi2S3 spheres coated with the MOF-derived Co9S8 and N-doped carbon composite layer(Bi2S3@Co9S8/NC composite spheres)have been rational designed and synthesized.As expected,the core-shell Bi2S3@Co9S8/NC composite spheres exhibit remarkable electrochemical performance in terms of high reversible capacity(597 m Ah g-1 after 100 cycles at 0.1 A g-1),good rate capability(341 m Ah g-1 at 8 A g-1)and long-term cycling stability(458 m Ah g-1 after 1000 cycles at 1 A g-1)when investigated as anode materials for SIBs.Electrochemical analyses further reveal the favorable reaction kinetics in the Bi2S3@Co9S8/NC composite spheres.In addition,the possible sodium storage mechanism has been studied by ex-situ X-ray diffraction technique.More importantly,a sodium-ion full cell based on Na3 V2(PO4)3 GO as cathode and Bi2S3@Co9S8/NC as anode is also fabricated,suggesting their potential for practical applications.It is anticipated that the present work could be extended to construct other advanced electrode materials using MOFs-derived carbon-based composites as surface coating materials for various energy storagerelated applications. 展开更多
关键词 Bi2S3 Metal-organic frameworks Surface coating Anode materials Sodium-ion batteries
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