文献类型：期刊文献

英文题名：Interface-engineered MoS2/C nanosheet heterostructure arrays for ultra-stable sodium-ion batteries

作者：Wang, Haiyan[1];Jiang, Hao[1];Hu, Yanjie[1];Saha, Petr[2];Cheng, Qilin[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Tomas Bata Univ Zlin, Univ Inst, Ctr Polymer Syst, Trida T Bati 5678, Zlin 76001, Czech Republic

年份：2017

卷号：174

起止页码：104

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20173704155314);WOS:【SCI-EXPANDED(收录号:WOS:000413321000009)】；

基金：This work was supported by the National Natural Science Foundation of China (21522602, 51672082, 91534202), the International Science and Technology Cooperation Program of China (2016YFE0131200), the Shanghai Rising-Star Program (15QA1401200), the Basic Research Program of Shanghai (17JC1402300), and the Fundamental Research Funds for the Central Universities (222201718002).

语种：英文

外文关键词：MoS2; Heterointerface; Micro-area etching; Sodium ion batteries; Flexible electrode

摘要：Development of ultra-stable high capacity electrodes is imperative for the widespread commercialization of sodium-ion batteries. Herein, we employed a micro-area etching and surface functionalization strategy to synthesize two-dimensional (2D) MoS2/C nanosheets with a well-defined heterointerface vertically anchored on a carbon cloth. The large MoS2/C nanosheet heterointerface and a high interlayer distance (0.99 nm) not only facilitated Na+ intercalation but also improved the diffusion kinetics of Na+ in the 2D interlayer space. A modulation of the cut-off voltage yielded a high specific capacity of 433 mAh g(-1) at 0.2 A g(-1) and 232 mAh g(-1) at 10 A g(-1) within the potential range of 0.4-3.0 V. These values are much higher than that of pure MoS2 nanosheet arrays (162 mAh g(-1) at 10 A g(-1)). More importantly, during the first 1500 cycles, the capacity was maintained at similar to 320 mAh g(-1) at 1 A g(-1), while after 10000 cycles, it became approximately similar to 271 mAh g(-1) at 3 A g(-1). These are the best values ever reported for MoS2-based anode materials for SIBs. Furthermore, after being assembled into a flexible battery, it withstand repeated bending for over 200 times without any obvious capacity loss. Hence, this material is a promising electrode for future flexible batteries. (C) 2017 Elsevier Ltd. All rights reserved.