三维多级孔类石墨烯载三氧化二铁锂离子电池负极材料  

Nanosized Fe_2O_3 on Three Dimensional Hierarchical Porous Graphene-Like Matrices as High-Performance Anode Material for Lithium Ion Batteries

作　　者：张勤伟[1] 李运勇[1] 沈培康[1] 

机构地区：[1]中山大学光电材料与技术国家重点实验室,物理科学与工程技术学院,广东广州510275

出　　处：《电化学》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

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.

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 

分 类 号：TM912[电气工程—电力电子与电力传动]