期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 857, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.158236
关键词
MoS2/carbon nanofiber; 1T-MoS2; In situ phase transition; Lithium sulfur batteries; Interlayer
资金
- National Research Foundation of Korea (NRF) - Korea government [2020R1A2C2010510, 2020R1A6A1A03044977]
The study focuses on solving key issues for commercialization of Li-S batteries, such as shuttle effect. The interlayer structure MoS2/CNF effectively suppresses the shuttle effect and improves the rate performance of the Li-S battery.
Lithium-sulfur (Li-S) batteries are electrochemical energy devices that can store electrical energy in solid-state sulfur as a cathode. However, despite their high capacity and energy density, there are key issues for commercialization of Li-S batteries that need to be solved, such as shuttle effect to be solved. In this study, for high-rate performance Li-S batteries, we fabricated an interlayer consisting of molybdenum disulfide (MoS2) and carbon nanofiber (CNF) (MoS2/CNF). The in situ phase transition of 2H-MoS2 to 1T-MoS2 in the MoS2/CNF was electrochemically induced. The 1T-MoS2/CNF interlayer structure was found to effectively suppress the shuttle effect. The superior rate performance of the Li-S cell with 1T-MoS2/CNF was found to result from the interlayer structures acting as an upper current collector and a reservoir for Li-polysulfides. (C) 2020 Elsevier B.V. All rights reserved.
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