文献类型：期刊文献

英文题名：Construction of nanoporous Mo2C shell/MoO3 core composite by converting MoO3 and its superior performance in lithium sulfur battery br

作者：Zhao, Chongjun[1];Xu, Sijia[1];Zhang, Xu[1];Wang, Yixuan[1];Rui, Pengfei[1];Zheng, Jiexin[1];Zhao, Chunhua[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultra fine Mat Minist Educ, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2022

卷号：922

外文期刊名：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000863042400009)】；

基金：We are grateful for the support of National Natural Science Foundation of China (22075082) , Natural Science Foundation of Shanghai (No. 19ZR1413000, 13ZR1411900) , Shanghai Alliance Plan (No. LM201881, LM201751) , Shanghai Military-civilian Integration Development Project (JMRHCY-2020-006) , Shanghai Leading Academic Discipline Project (B502) , and Shanghai Key Laboratory Project (08DZ2230500) .

语种：英文

外文关键词：Mo 2 C; MoO 3-modified separator; Reduction; Carbonization; CFRP; Li -S batteries

摘要：The lithium-sulfur (Li-S) battery is a promising energy storage device in the future. However, its performance is strongly affected by the shuttle effect and inherent sluggish kinetics. Herein, Mo2C/MoO3-modified separator is constructed, in which MoO3 particles are derived by the decomposition of Mo source and simultaneously their surfaces are converted (reduced and carbonized) into Mo2C, i.e., Mo2C shell/MoO3 core. In addition, the resin matrix of the waste CFRP (Carbon fiber reinforced polymer) acts as the carbon source for the change from MoO3 to Mo2C, while CF is claimed from CFRP. The synergistic effect of conductive Mo2C-shell and polar MoO3-core anchors lithium polysulfide to promote the conversion of sulfur. Benefited from block effect on the soluble lithium polysulfide (LiPS) and catalytic effect on sulfur, Li-S battery with Mo2C/MoO3-modified separator owns excellent electrochemical performance: A high initial discharge specific capacity of 1288 mAh g-1 at 0.2C and an initial capacity of 670 mAh g-1 at 4C, as well as the average decay rate per cycle of 0.039% over 250 times.