期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 4, 页码 3544-3553出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b10807
关键词
Li-ion battery; anode; tin oxide; graphene; carbon nanotube
资金
- National Natural Science Foundation of China [21403139, 51472161, 51472160, 51671135, 51272157]
- Shanghai Subject Chief Scientist
- Fundamental Research of the Science and Technology Commission of Shanghai Municipality [15JC1490800, 12JC1406900]
- International Cooperation Program of the Science and Technology Commission of Shanghai Municipality [14520721700]
- (Eastern Scholar) at Shanghai Institutions of Higher Learning [TP2014048]
A unique 3D graphene-single walled carbon nanotube (G-SWNT) aerogel anchored with SnO2 nanoparticles (SnO2@G-SWCNT) is fabricated by the hydrothermal self-assembly process. The influences of mass ratio of SWCNT to graphene on structure and electrochemical properties of SnO2@G-SWCNT are investigated systematically. The SnO2@GSWCNT composites show excellent electrochemical performance in Li-ion batteries; for instance, at a current density of 100 mA a specific capacity of 758 mAh g(-1) was obtained for the SnO2@G-SWCNT with 50% SWCNT in G-SWCNT and the Coulombic efficiency is close to 100% after 200 cycles; even at current density of 1 A g(-1),it can still maintain a stable specific capacity of 537 mAh after 300 cycles. It is believed that the 3D G-SWNT architecture provides a flexible conductive matrix for loading the SnO2, facilitating the electronic and ionic transportation and mitigating the volume variation of the SnO2 during lithiation/delithiation. This work also provides a facile and reasonable strategy to solve the pulverization and agglomeration problem of other transition metal oxides as electrode materials.
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