文献类型：期刊文献

英文题名：Supersaturated bridge-sulfur and vanadium co-doped M0S2 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] Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai, 200237, China; [2] Christopher Ingold Laboratory, Department of Chemistry, University College London, 20 Gordon Street, London, WC1H0AJ, United Kingdom

年份：2021

卷号：14

期号：1

起止页码：74

外文期刊名：Nano Research

收录：EI(收录号：20204109326631)

语种：英文

外文关键词：Anodes - Storage (materials) - Metal ions - Nanosheets - Layered semiconductors - Sodium compounds - Sulfur - Molybdenum compounds - Vanadium - Sodium-ion batteries - Reaction kinetics

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 MoS2 nanosheet arrays on carbon cloth (denoted as V-MoS2+x/CC). The bridge-sulfur in MoS2 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. [Figure not available: see fulltext.]. ? 2020, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.