羟基钴包覆LiMn0.6Fe0.4PO4的电化学性能分析

Analysis of Electro-chemical Properties of LiMn0.6Fe0.4PO4 Coated with Hydroxyl Cobalt

张绮兰 ¹仇未星 ¹王波 ¹韩玮 ¹柴同 ¹张胜男¹

扫码查看

作者信息

1. 兰州石化职业技术大学机械工程学院,甘肃兰州 730000
折叠

摘要

为改善锂离子电池的循环以及倍率快充性能需要对LiMn0.6Fe0.4PO4进行改性,通过包覆羟基氧化钴,烧结后表面形成具有三价Co的钴化合物包覆物,高价态的Co化合物具有较高的锂离子扩散系数和电子电导率,可以显著提高LiMn0.6Fe0.4PO4界面处锂离子扩散速率和电化学反应速率,改善LiMn0.6Fe0.4PO4的循环和低温性能.

Abstract

In order to improve the cycling and rate fast charging performance of Lithium-ion batteries,LiMn0.6Fe0.4PO4 needs to be modified.In this paper,hydroxylated cobalt oxide is coated and sintered to form a cobalt compound coating with trivalent Co on the surface.The high valence Co compound has a high lithium-ion diffu-sion coefficient and electronic conductivity,which can significantly improve the lithium-ion diffusion rate and electro-chemical reaction rate at the LiMn0.6Fe0.4PO4 interface,and improve the cycling and low-temperature per-formance of LiMn0.6Fe0.4PO4.

关键词

锂离子电池/磷酸锰铁锂材料/包覆改性/性能优化

Key words

lithium-ion battery/lithium manganese iron phosphate material/coating modification/performance optimization

引用本文复制引用

出版年

2024

兰州工业学院学报

兰州工业学院

兰州工业学院学报

影响因子：0.205

ISSN：1009-2269

段落导航