期刊
NANO RESEARCH
卷 8, 期 2, 页码 481-490出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-014-0638-1
关键词
V2O5 octahedron; adjustable pore; long-life lithium battery
类别
资金
- National Basic Research Program of China [2013CB934103, 2012CB933003]
- National Science Fund for Distinguished Young Scholars [51425204]
- National Natural Science Foundation of China [51272197]
- Hubei Science Fund for Distinguished Young Scholars [2014CFA035]
- Fundamental Research Funds for the Central Universities [2013-VII-028]
Three-dimensional (3D) porous V2O5 octahedrons have been successfully fabricated via a solid-state conversion process of freshly prepared ammonium vanadium oxide (AVO) octahedrons. The formation of AVO octahedrons is a result of the selective adsorption of capping reagents and the favourable supersaturation of growth species. Subsequently, 3D porous V2O5 octahedrons were obtained by simple thermolysis of the AVO octahedrons via a calcination treatment. As cathode material for lithium batteries, the porous V2O5 octahedron cathode exhibits a capacity of 96 mA center dot g(-1) at high rate up to 2 A center dot g(-1) in the rang of 2.4-4 V and excellent cyclability with little capacity loss after 500 cycles, which can be ascribed to its high specific surface area and tunable pore architecture. Importantly, this facile solid-state thermal conversion strategy can be easily extended to controllably fabricate other porous metal oxide micro/nano materials with specific surface textures and morphologies.
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