期刊
ELECTROCHIMICA ACTA
卷 207, 期 -, 页码 198-206出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.04.135
关键词
Lithium sulfur battery; double-coating cathode; metallic oxide; graphene
资金
- National Natural Science Foundation of China [21376001, 21576028, 21506012]
- Foundation for Basic Research of Beijing Institute of Technology [20141042003, 20151042001]
Herein, we report a facile and effective adsorption strategy to improve the performance of Lithium-Sulfur (Li-S) batteries. MnO2 nanosheets grown on the surface of highly conductive graphene resulted in a coupled composite bilayer electrode when coated onto a sulfur cathode. In this way, a high initial specific capacity of 1395 mA h g(-1) at a rate of 0.5C, a coulombic efficiency approaching 100% and steady cyclic efficiency with a fade rate of 0.3% per cycle from 10 to 100 cycles has been achieved. This hybrid electrode not only shows enhanced electrochemical performance but can also be easily controlled and scaled thereby aiding future commercialization of high-performance Li-S batteries. (C) 2016 Elsevier Ltd. All rights reserved.
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