Three-dimensional porous V2O5 hierarchical octahedrons with adjustable pore architectures for long-life lithium batteries
V2O5 octahedron, adjustable pore, long-life lithium battery
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 mAh·g–1 at high rate up to 2 A·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.
Tsinghua University Press
Qinyou An,Pengfei Zhang,Fangyu Xiong,Qiulong Wei,Jinzhi Sheng,Qinqin Wang,Liqiang Mai, Three-dimensional porous V2O5 hierarchical octahedrons with adjustable pore architectures for long-life lithium batteries. NanoRes.2015, 8(2): 481–490