摘要
采用简单的水解、热处理方法合成三氧化二铁(Fe2O3)负载在三维多级孔类石墨烯(3D HPG)上的复合材料.3D HPG有效的导电网络有利于负载纳米Fe2O3,使其呈均匀分散状态,并有效增强纳米复合物的导电率,提高Fe2O3利用率,抑制纳米Fe2O3的团聚,从而制得稳定、高性能的锂离子电池负极材料.Fe2O3-3D HPG电极在50m A·g-1电流密度下首次放电容量达1745 m Ah·g-1,50周期放电容量保持于1095 m Ah·g-1.
Ferric oxide （Fe2O3） as a promising anode material for lithium ion battery is due to its high theoretical capacity （1007 mAh·g^--1）, earth abundance and low cost. The nanosized Fe2O3 on the three dimensional hierarchical porous graphene-like network （denoted as Fe2O3-3D HPG） has been synthesized by homogeneous precipitation and heat treatment. The 3D HPG can provide a highly conductive structure in conjunction to support well contacted Fe2O3 nanoparticles, and effectively enhance the mechanical strength of the matrices during volume changes as well as improve the utilization rate of Fe2O3 and suppress the aggregation of Fe2O3 nanoparticles during Li ion insertion/extraction. As a result, the first discharge capacity of Fe2O3-3D HPG was up to 1745 mAh.g^-1 at 50 mA.g^-1, and after 50 cycles, the retention of the capacity was 1095 mAh.g^-1.
出处
《电化学》
CAS
CSCD
北大核心
2015年第1期66-71,共6页
Journal of Electrochemistry
基金
国家自然科学基金项目(No.21073241
No.51210002)资助
关键词
FE2O3
负极材料
锂离子电池
三维多级孔类石墨烯材料
电化学
Fe2O3
anode materials
Li ion batteries
three dimensional hierarchical porous graphene-like matrix
electrochemistry
作者简介
通讯作者，Tel：（86—20）84036736，E—mail：stsspk@mail．sysu．edu．cn
