Large-scale carambola-like V_(2)O_(5) nanoflowers arrays on microporous reed carbon as improved electrochemical performances lithium-ion batteries cathode  

作　　者：Hua Tan Xin Zhi Yu Kai Huang Jianxin Zhong Bingan Lu 

机构地区：[1]School of Physics and Optoelectronics,Hunan Institute of Advanced Sensing and Information Technology,Xiangtan University,Xiangtan 41U05,Hunan,China [2]School of Physics and Electronics,State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan Provincial Key Laboratory of Multi-electron based Energy Storage Devices,Hunan University,Changsha 410083,Hunan,China

出　　处：《Journal of Energy Chemistry》2020年第12期388-395,共8页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 51922038 and 51672078);Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project (No. 71675004);Hunan Youth Talents (2016RS3025);Hunan Natural Science Foundation (2016JJ3123)。

摘　　要：To search for new cathode materials with high energy density of Lithium-ion batteries(LIBs) is one of the most challenging issues. Vanadium pentoxide(V2 O5) with high theoretical specific capacity is believed to be a promising candidate for the next generation cathode materials, yet still suffers from low lithium ion diffusion coefficient and poor electronic conductivity resulting in low cycling life and poor rate performances. Here, we report new large-scale carambola-like V2 O5 nanoflowers arrays anchored on microporous reed carbon as high performances LIBs cathode. Each individual pore space of the microporous reed carbon is like a hexagonal cylinder, and the area of each carbon wall is more than103 um2, which is favorable for the growth of V2 O5 nanostructure arrays. After hydrothermal, the largescale carambola-like V2 O5 nanoflowers arrays can directly grow on the surface of microporous carbon.Due to the novel composite structures, the V2 O5 nanoflowers arrays@microporous carbon stabilizes at273 mA h g^(-1) after 100 cycles at 0.2 C. When cycling at 1.0 C over 500 cycles, the capacity still maintains at 180 mAh g^(-1). The demonstrated approach in this work paves the way for the development of high rate capability and excellent cycling stability V2 O5-based cathode materials.

关 键 词：V_(2)O_(5) CATHODE Reed carbon MICROPOROUS Lithium-ion batteries 

分 类 号：TB383.4[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]