摘要
of main observation and conclusion We successfully prepared the Li-VO2(M)nanosheets via a facile lithiation method.After compositing with conductive carbon fibers,the sulfur host(Li-VO2(M)@CFs)combines the efficient adsorption ability of the VO2(M)with superior electronic conductivity of the carbon fibers.Besides,carbon fiber cloth used as the current collector can provide the 30 electronic channels.Therefore,the coin cells exhibited the superior reversible capacity of 1250 mA h g^-1 at 0.2 C and a low capacity decay value of 0.068%per cycle within 416 cycles at 1C,indicative of the favorable cycling stability.Moreover,even at a high rate of 5C,it also kept at a high discharge capacity of 401 mA h g^-1.In conclusion,this work discloses an attractive route to reduce the dissolution loss of lithium polysulfides(UPSs)and enhance the overall performance of Li-S batteries.
基金
This work was financially supported by the International Science&Technology Cooperation Program of China under2019YFEO100200,NSAF(No.U1930113)
the Beijing Natural Science Foundation(No.L182022)
the 13th Five-Year Plan of Advance Research and Sharing Techniques bv the Equipment Department(41421040202),SAST(2018-114).
作者简介
Daobin Mu,E-mail:mudb@bit.edu.cn;Borong Wu,E-mail:wubr@bit.edu.cn。
