Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7725155 | Journal of Power Sources | 2018 | 9 Pages |
Abstract
Ultrathin and lightweight MoS2/carbon nanotube (CNT) interlayers are developed to effectively trap polysulfides in high-performance lithium-sulfur (Li-S) batteries. The MoS2/CNT interlayer is constructed by loading MoS2 nanosheets onto a cross-stacked CNT film. The CNT film with excellent conductivity and superior mechanical properties provides the Li-S batteries with a uniform conductive network, a supporting skeleton for the MoS2 nanosheets, as well as a physical barrier for the polysulfides. Moreover, chemical interactions and bonding between the MoS2 nanosheets and the polysulfides are evident. The electrode with the MoS2/CNT interlayer delivers an attractive specific capacity of 784â¯mAâ¯hâ¯gâ1â¯at a high capacity rate of 10â¯C. In addition, the electrode demonstrates a high initial capacity of 1237â¯mAâ¯hâ¯gâ1 and a capacity fade as low as â0.061% per cycle over 500 charge/discharge cycles at 0.2â¯C. The problem of self-discharge can also be suppressed with the introduction of the MoS2/CNT interlayer. The simple fabrication procedure, which is suitable for commercialization, and the outstanding electrochemical performance of the cells with the MoS2/CNT interlayer demonstrate a great potential for the development of high-performance Li-S batteries.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Lingjia Yan, Nannan Luo, Weibang Kong, Shu Luo, Hengcai Wu, Kaili Jiang, Qunqing Li, Shoushan Fan, Wenhui Duan, Jiaping Wang,