Three-dimensional porous V2O5 hierarchical octahedrons with adjustable pore architectures for long-life lithium batteries  

作　　者：Qinyou An Pengfei Zhang Fangyu Xiong Qiulong Wei Jinzhi Sheng Qinqin Wang Liqiang Mai 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory,Wuhan University of Technology, Wuhan, Hubei 430070, China

出　　处：《Nano Research》2015年第2期481-490,共10页纳米研究（英文版）

摘　　要：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.三维(3D ) 多孔的 V < 潜水艇 class= “ a-plus-plus ” > 2 </sub > O < 潜水艇 class= “ a-plus-plus ” > 5 </sub> 八面体成功地被制作了经由一固态刚准备的铵钒氧化物(AVO ) 的变换过程八面体。AVO 八面体的形成是盖住试剂和生长种类的赞成过度饱和的选择吸附的结果。随后， 3D 多孔的 V < 潜水艇 class= “ a-plus-plus ” > 2 </sub > O < 潜水艇 class= “ a-plus-plus ” > 5 </sub> 八面体被 AVO 八面体的简单 thermolysis 经由一个锻烧处理获得。作为为锂电池的阴极材料，多孔的 V < 潜水艇 class= “ a-plus-plus ” > 2 </sub > O < 潜水艇 class= “ a-plus-plus ” > 5 </sub> 八面体阴极在西班牙的北方展出 96 mAsga 盆的一个能力；并且(3 ) Zpy (n ?=? 17 ) ， LV 质量从 226 被减少[178；306 ] g 到 220 [169；254 ] g (p ?=? 0.007 ) 在 13 点 ? 桴 ? 畦摮浡湥慴? 牦煥敵据敩 ? 景琠敨猠摥浩湥獴? 敢楳敤琠敨氠湯楧畴楤慮? 湡 ? 牴湡癳牥敳映湵慤敭瑮污映敲畱湥楣獥漠 ? 慥档戠極摬湩 ? 慢敳 ? 湯琠敨愠灭楬畴敤猠数瑣慲愠摮琠敨映潬牯猠数瑣慲? 慲楴?? 剓? 敭桴摯？

关 键 词：V2O5 octahedron adjustable pore long-life lithium battery 

分 类 号：TQ426[化学工程] P618.130.2[天文地球—矿床学]