文献类型：期刊文献

中文题名：核壳结构α-Fe2O3锂离子电池阳极材料制备及应用

英文题名：Preparation and application of core shell structure α-Fe2O3 anode material for lithium ion battery

作者：郭志超[1];张丽伟[1];程素君[1];

第一作者：郭志超

通讯作者：Guo, Zhichao

机构：[1]新乡学院物理与电子工程学院,河南新乡453003;

第一机构：新乡学院物理与电子工程学院

年份：2017

卷号：68

期号：9

起止页码：3638-3644

中文期刊名：化工学报

外文期刊名：Journal of Chemical Industry and Engineering（China）

收录：EI(收录号：20174904498805);Scopus(收录号：2-s2.0-85092428881);北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：Received date: 2017-03-21. Corresponding author: GUO Zhichao, guozhichao610@sina.com Foundation item: supported by the Key Scientific Research Project of Higher Education (17A140026) and the Xinxiang Science and Technology Innovation & Development Plan(CXGG16033).

语种：中文

中文关键词：纳米粒子;胶体;活化;α-Fe2O3;锂离子电池

外文关键词：nanoparticles; colloid; activation; α-Fe2O3; lithium ion battery

摘要：以甘氨酸作为结构导向剂,通过一步合成溶剂热法制备了新型的胶体核壳结构α-Fe2O3。胶体核壳α-Fe2O3的结构单元（壳和核）是纳米盘状的α-Fe2O3,而纳米盘由α-Fe2O3纳米粒子组成。以制备的核壳结构材料作为锂离子电池阳极材料的活性物质,组装成锂离子电池进行测试,电池在180圈循环时仍具有1437.2 mA·h·g^-1的放电比容量和1425.7 mA·h·g^-1的充电比容量,表明核壳α-Fe2O3胶体呈现出高的锂存储容量和倍率性能。独特的核壳状胶体结构,较大的活性物质与电解液接触面积和快速的锂离子扩散能力可能是该材料具有优异性能的关键因素。
In order to improve the practical application of nanostructured as the anode materials for lithium ion batteries, a novel core-shell α-Fe2O3 colloidosome was successfully synthesized via one-step hydrothermal method, glycine was used as the structure directing agent in the preparation process. The core-shell α-Fe2O3 colloidosomes were assembled by α-Fe2O3 nanoplates, which were composed of α-Fe2O3 nanoparticles. The α-Fe2O3 nanoplates are the building blocks of three dimensional superstructure. The prepared material was used as the activator of the anode material for lithium ion batteries. When testified as Li-ion battery anode, 3D core-shell α-Fe2O3 exhibited amazing specific capacities and excellent cyclabilities, the battery still has a 1437.2 mA·h·g^-1 discharge capacity and a charge capacity of 1425.7mA·h·g^-1 in the 180 cycle. The unique core-shell colloid structure, the larger contact area of the active material and the electrolyte, and the rapid lithium ion diffusion ability may be the key factors for the excellent performance of the material.