Preparation of Reduced Graphene Oxide Aerogel and its Application in Lithium Sulfur Battery

被引:2
作者
Xiao, Jianrong [1 ]
Yang, Zhiyun [1 ]
Wang, Hongzhe [2 ]
Guo, Yafang [1 ]
Tao, Zengren [1 ]
机构
[1] Guilin Univ Technol, Coll Sci, Guilin 541004, Guangxi Provinc, Peoples R China
[2] Southeast Univ, Sch Mat Sci & Engn, Sci & Engn, Nanjing 211189, Jiangsu, Peoples R China
来源
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2017年 / 12卷 / 12期
关键词
RGO-gel; coating layer; Li-S battery; electrochemical performance; ELECTROCHEMICAL PERFORMANCE; POLYMER ELECTROLYTE; CARBON NANOTUBES; CATHODE; ION; DEGRADATION; NITROPHENOL; REDUCTION; COMPOSITE; HYDROXIDE;
D O I
10.20964/2017.12.450
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A facile method was used to prepare novel nitrogen-doped sulfur-based compound material coated with reduced-graphene-oxide aerogel NCNT/S(RGO-gel) composite. As coating layer, the material was systematically studied through X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and electrochemical test. NCNT/S(RGO-gel) electrode showed first discharge specific capacity of 1403.7 mAh.g(-1) under 500 mA/g density. The material also exhibited outstanding rate capability and long-term cycle stability. Results showed that RGO-gel coated composite electrode retained its discharge specific capacity of 912.4 mAh/g after 175 cycles under 500 mA/g current density. The composite electrode presented capacity retention rate of 80%. Improved electrochemical performance was mainly ascribed to RGO-gel, which not only reduced dissolution of sulfur polymer (S-n(2-)) but also significantly improved conductivity. NCNT also served as bridge between RGO-gel layers, significantly shortening the path for lithium-ion transport. Thus, novel NCNT/S(RGO-gel) composite can act as potential positive electrode for high performance Li-S batteries.
引用
收藏
页码:11108 / 11121
页数:14
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