Hollow Structured Li 3 VO 4 Wrapped with Graphene Nanosheets in Situ Prepared by a One-Pot Template-Free Method as an Anode for Lithium-Ion Batteries
2013; American Chemical Society; Volume: 13; Issue: 10 Linguagem: Inglês
10.1021/nl402237u
ISSN1530-6992
AutoresYi Shi, Jiazhao Wang, Shulei Chou, David Wexler, Huijun Li, Kiyoshi Ozawa, Huan Liu, Yuping Wu,
Tópico(s)Supercapacitor Materials and Fabrication
ResumoTo explore good anode materials of high safety, high reversible capacity, good cycling, and excellent rate capability, a Li3VO4 microbox with wall thickness of 40 nm was prepared by a one-pot and template-free in situ hydrothermal method. In addition, its composite with graphene nanosheets of about six layers of graphene was achieved. Both of them, especially the Li3VO4/graphene nanosheets composite, show superior electrochemical performance to the formerly reported vanadium-based anode materials. The composite shows a reversible capacity of 223 mAh g(-1) even at 20C (1C = 400 mAh g(-1)). After 500 cycles at 10C there is no evident capacity fading.
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