文献类型：期刊文献

英文题名：Supersaturated bridge-sulfur and vanadium co-doped MoS2 nanosheet arrays with enhanced sodium storage capability

作者：Dong, Yuru[1];Zhu, Zhengju[1];Hu, Yanjie[1];He, Guanjie[2];Sun, Yue[1];Cheng, Qilin[1];Parkin, Ivan P.[2];Jiang, Hao[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]UCL, Dept Chem, Christopher Ingold Lab, 20 Gordon St, London WC1H 0AJ, England

年份：2021

卷号：14

期号：1

起止页码：74

外文期刊名：NANO RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000575718000004)】；

基金：The authors gratefully acknowledge the financial support from National Natural Science Foundation of China (Nos. 51672082, 21975074, and 91534202), the Basic Research Program of Shanghai (No. 17JC1402300), the Shanghai Scientific and Technological Innovation Project (No. 18JC1410500), and the Fundamental Research Funds for the Central Universities (No. 222201718002).

语种：英文

外文关键词：MoS2; bridge-sulfur; high specific capacity; sodium-ion battery; cycle life

摘要：The low specific capacity and sluggish electrochemical reaction kinetics greatly block the development of sodium-ion batteries (SIBs). New high-performance electrode materials will enhance development and are urgently required for SIBs. Herein, we report the preparation of supersaturated bridge-sulfur and vanadium co-doped MoS(2)nanosheet arrays on carbon cloth (denoted as V-MoS2+x/CC). The bridge-sulfur in MoS(2)has been created as a new active site for greater Na(+)storage. The vanadium doping increases the density of carriers and facilitates accelerated electron transfer. The synergistic dual-doping effects endow the V-MoS2+x/CC anodes with high sodium storage performance. The optimized V-MoS2.49/CC gives superhigh capacities of 370 and 214 mAh.g(-1)at 0.1 and 10 A.g(-1)within 0.4-3.0 V, respectively. After cycling 3,000 times at 2 A.g(-1), almost 83% of the reversible capacity is maintained. The findings indicate that the electrochemical performances of metal sulfides can be further improved by edge-engineering and lattice-doping co-modification concept.