期刊
ADVANCED SCIENCE
卷 5, 期 11, 页码 -出版社
WILEY
DOI: 10.1002/advs.201801021
关键词
anode materials; long-cycle life; NaPF6/DME; sodium-ion batteries; TiS2
资金
- Natural Science Foundation of China [21503084, 51622703]
- 973 Program [2015CB258400]
- Major Project of Technological Innovation in Hubei Province [2016AAA038]
Titanium disulfide (TiS2) is investigated as an advanced conversion electrode for sodium (Na)-ion batteries (NIB) in an ether-based electrolyte (NaPF6/glyme (DME)). The as-prepared TiS2 demonstrates a high reversible capacity of 1040 mA h g(-1) at 0.2 A g(-1) with the capacity contribution of 521 mA h g(-1) in the voltage region below 1.0 V (vs Na/Na+), remarkable initial coulombic efficiency of 95.9% and superior rate capability of 621 mA h g(-1) at 40 A g(-1). The high conductivity of the Ti-based compounds and nanosized particles generated by chemical conversion reactions could minimize the entropic barrier for the reversible conversion, resulting in high reversibility and ultrafast charge/discharge ability of the electrode. Moreover, with its strong ability to adsorb soluble polysulfide intermediates, the as-prepared TiS2 electrode exhibits superior cycling stability over 9000 cycles, serving as a stable and ultra-high capacity conversion electrode for NIBs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据