三维多级孔类石墨烯载三氧化二铁锂离子电池负极材料

张勤伟; 李运勇; 沈培康

doi:10.13208/j.electrochem.140913

电化学 >

2015 , Vol. 21 >Issue 1: 66 - 71

DOI: https://doi.org/10.13208/j.electrochem.140913

研究论文

三维多级孔类石墨烯载三氧化二铁锂离子电池负极材料

张勤伟 ,
李运勇 ,
沈培康

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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

收稿日期: 2014-09-12

修回日期: 2014-11-13

网络出版日期: 2014-11-18

基金资助

国家自然科学基金项目（No. 21073241，No. 51210002）资助

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Nanosized Fe₂O₃ on Three Dimensional Hierarchical Porous Graphene-Like Matrices as High-Performance Anode Material for Lithium Ion Batteries

ZHANG Qin-Wei ,
LI Yun-Yong ,
SHEN Pei-Kang

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State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China

Received date: 2014-09-12

Revised date: 2014-11-13

Online published: 2014-11-18

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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50 mA·g^-1电流密度下首次放电容量达1745 mAh·g^-1，50周期放电容量保持于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

本文引用格式

张勤伟 , 李运勇 , 沈培康 . 三维多级孔类石墨烯载三氧化二铁锂离子电池负极材料[J]. 电化学, 2015 , 21(1) : 66 -71 . DOI: 10.13208/j.electrochem.140913

Abstract

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 Fe₂O₃on 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.

Key words： Fe2O3; anode materials; Li ion batteries; three dimensional hierarchical porous graphene-like matrix; electrochemistry

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