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- Title
A 3D MoS2/Graphene Microsphere Coated Separator for Excellent Performance Li-S Batteries.
- Authors
Yang, Shuang; Zhang, Junfan; Tan, Taizhe; Zhao, Yan; Liu, Ning; Li, Haipeng
- Abstract
Lithium-sulfur (Li-S) batteries are the most prospective energy storage devices. Nevertheless, the poor conductivity of sulfur and the shuttling phenomenon of polysulfides hinder its application. In this paper, flower-like MoS2/graphene nanocomposite is prepared and deposited on a multi-functional separator to enhance the electrochemical behavior of Li-S batteries. The results demonstrated that the MoS2/graphene-coated separator is contributing to inhibit the shuttling phenomenon of polysulfides and improve the integrity of sulfur electrode. The initial discharge capacity of the battery using MoS2/graphene-coated separator at 0.2 C was up to 1516 mAh g−1. After 100 cycles, a reversible capacity of 880 mAh g−1 and a coulombic efficiency of 98.7% were obtained. The improved electrochemical behavior can be due to the nanostructure and Mo-S bond of the MoS2/graphene composite, which can combine physical shielding and chemisorption to prohibit the shuttle effect of polysulfides. The results prove that the MoS2/graphene-coated separator has the potential for feasible application in Li-S batteries to enhance their electrochemical performance.
- Subjects
LITHIUM sulfur batteries; ENERGY storage; ELECTRIC properties of graphene; SULFUR electrodes; PHOTOELECTRIC devices
- Publication
Materials (1996-1944), 2018, Vol 11, Issue 10, p2064
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma11102064