期刊
CERAMICS INTERNATIONAL
卷 45, 期 6, 页码 7830-7838出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.01.090
关键词
SnO2; Dual-carbon; Li-ion batteries; Anode
资金
- National Natural Science Foundation of China, China [51502350, 51772334, 51702367]
- China Postdoctoral Science Foundation, China [2016M592447]
- International Postdoctoral Exchange Fellowship Program, China [155212]
- Hunan Provincial Innovation Foundation for Postgraduate, China [CX2017B060]
A composite consisting of SnO2 nanoparticles (approximately 5 nm in size) confined in a dual-carbon framework (SnO2@C/rGO, where rGO stands for reduced graphene oxide), was prepared using a facile hydrothermal method. The carbon precursors, sodium alginate and graphene oxide (GO), produced a favourable network for the SnO2 nanoparticles, which were encapsulated in amorphous carbon and well-dispersed over the surface of the rGO nanosheets. The SnO2 @C/rGO electrode exhibited notable cycling performance and rate capability as anode material for Li-ion batteries, and maintained a capacity of 844.1 mA h g(-1) for over 1000 cycles at the current of density of 1 A g(-1) and 525.4 mA h g(-1) for over 1700 cycles at 5 A g(-1). Compared with the SnO2@C and SnO2/rGO electrodes, the superior electrochemical properties of the SnO2@C/rGO electrode could be ascribed to the structural stability of the dual-carbon framework as well as the improved electrical conductivity and diffusion coefficient of Li+ ions.
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