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Three-dimensional Covalent Organic Frameworks as Host Materials for Lithium-Sulfur Batteries 被引量:3
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作者 Zhen Li Hang-Yu Zhou +4 位作者 Fu-Lai Zhao Tian-Xiong Wang Xuesong Ding Bao-Hang Han Wei Feng 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2020年第5期550-557,I0008,共9页
Two reported three-dimensional covalent organic frameworks(3D-COFs),COF-300 and COF-301,which have hierarchical porous structures and large pore volumes,were synthesized and employed as host materials for lithium-sulf... Two reported three-dimensional covalent organic frameworks(3D-COFs),COF-300 and COF-301,which have hierarchical porous structures and large pore volumes,were synthesized and employed as host materials for lithium-sulfur batteries.Owing to possessing excellent porosities as well as abundant hydroxyl groups in the pore walls,COF-301 can not only trap lithium polysulfides(PSs)via physical adsorption inside the pores,but also capture PSs by chemical interactions to relieve the shuttle effect.Interestingly,it is the first time that 3D-COFs were utilized as host materials for lithium-sulfur batteries as well as hydroxyl groups were introduced into COFs for improving the battery performance.As a result,COF-301@S as cathode material could reserve the capacity of 411.6 mA·h·g^-1 after 500 cycles with only 0.081%fading per cycle at 0.5 C,exhibiting better battery performance compared with COF-300@S.This study not only expands the applications of 3D-COFs but also provides a new route for designing lithium-sulfur batteries. 展开更多
关键词 Three-dimensional covalent organic framework flost material Lithium-sulfur battery Flydroxyl group Chemical interaction
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