郭雅卓,王宁,柴玉俊

• 1:河北师范大学化学与材料科学学院
• 2:河北师范大学分析测试中心

摘要(Abstract)：

过渡金属氧化物具有高的理论比容量，作为锂离子电池负极材料具有潜在的应用前景。金属氧化物Fe_2O_3的理论容量高，成本低，然而其电子传导性较差。为加快Fe_2O_3的电子传导，以不同形式的碳为碳源，制备了Fe_2O_3/碳复合材料，并研究了其电化学性能。结果表明：Fe_2O_3/碳纳米管(CNTs)复合材料中的碳含量最高，为20.40%。稳定的碳纳米管与Fe_2O_3相互缠绕，为Fe_2O_3在充放电过程中的体积膨胀提供了空间，保证了结构的完整性，并且增强了电子传导。借助于这种结构优势，Fe_2O_3/CNTs具有高可逆容量、优异的倍率性能(2000 mA·g~(-1)时，容量为483 mAh·g~(-1))和循环稳定性(500 mA·g~(-1)下，循环350次后，容量保持在721 mAh·g~(-1))。而且，Fe_2O_3/CNTs电极在充放电循环过程中显示出部分固体电解质膜(SEI)膜的溶解，有利于充放电循环稳定性的保持。

关键词(KeyWords)： Fe_2O_3;碳纳米管;倍率性能;稳定性

Abstract:

Keywords:

基金项目(Foundation): 河北师范大学重点基金(L2021Z08)

作者(Author): 郭雅卓,王宁,柴玉俊

DOI: 10.13289/j.issn.1009-6264.2021-0448

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