A 3D MoS2/Graphene Microsphere Coated Separator for Excellent Performance Li-S Batteries
1
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
2
Synergy Innovation Institute of GDUT, Heyuan 517000, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(10), 2064; https://doi.org/10.3390/ma11102064
Received: 24 August 2018
/
Revised: 18 October 2018
/
Accepted: 19 October 2018
/
Published: 22 October 2018
(This article belongs to the Section Energy Materials)
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.
View Full-Text
Keywords:
Li-S battery; shuttle effect; MoS2/graphene-coated separator
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
Yang, S.; Zhang, J.; Tan, T.; Zhao, Y.; Liu, N.; Li, H. A 3D MoS2/Graphene Microsphere Coated Separator for Excellent Performance Li-S Batteries. Materials 2018, 11, 2064. https://doi.org/10.3390/ma11102064
AMA Style
Yang S, Zhang J, Tan T, Zhao Y, Liu N, Li H. A 3D MoS2/Graphene Microsphere Coated Separator for Excellent Performance Li-S Batteries. Materials. 2018; 11(10):2064. https://doi.org/10.3390/ma11102064
Chicago/Turabian StyleYang, Shuang, Junfan Zhang, Taizhe Tan, Yan Zhao, Ning Liu, and Haipeng Li. 2018. "A 3D MoS2/Graphene Microsphere Coated Separator for Excellent Performance Li-S Batteries" Materials 11, no. 10: 2064. https://doi.org/10.3390/ma11102064
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
