MnO2 Modified Reduced Graphene Oxide for Lithium-Sulfur Batteries with Improved High-Rate Cycling Stability

被引:1
|
作者
Wu, Jianghong [1 ,2 ]
Liu, Boyu [2 ]
Shen, Fujin [2 ]
Chen, Yang [2 ]
Li, Deyi [2 ]
Liu, Wei [2 ]
Fan, Jincheng [2 ]
Chao, Zisheng [2 ]
机构
[1] Shenzhen Technol Univ, Coll Hlth Sci & Environm Engn, Shenzhen 518118, Guangdong, Peoples R China
[2] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China
基金
中国国家自然科学基金;
关键词
Lithium Sulfur Battery; MnO2; High-Rate Cycling Stability; EFFICIENT POLYSULFIDE ADSORPTION; CATHODE MATERIAL; CARBON MICROSPHERES; COMPOSITE CATHODE; PERFORMANCE; NANOSHEETS; PARTICLES; SPHERES; HOSTS;
D O I
10.1166/sam.2019.3521
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A facile and mild method was used to in situ grow MnO2 on RGO (reduced graphene oxide). This MnO2 modified RGO hybrid was designed as a host for sulfur and served as a cathode for lithium-sulfur batteries. The batteries with high loading of sulfur (similar to 70%) show high initial capacity compared with the one without MnO2, and excellent improved cycling performance at high rate of 1C, with a capacity retention of 87% after 300 cycles. The higher performance may benefit from MnO2 as a semiconductor which can facilitate electron transportation and provide migration pathways for Li+ by its tunnels structure, and as an anchor and transfer mediator to chemically trap polysulfides.
引用
收藏
页码:1093 / 1099
页数:7
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