羟基钴包覆LiMn_(0.6)Fe_(0.4)PO_(4)的电化学性能分析  

Analysis of Electro-chemical Properties of LiMn_(0.6)Fe_(0.4)PO_(4) Coated with Hydroxyl Cobalt

作　　者：张绮兰 仇未星 王波 韩玮 柴同 张胜男 ZHANG Qilan;QIU Weixing;WANG Bo;HAN Wei;CHAI Tong;ZHANG Shengnan(School of Mechanical Engineering,Lanzhou Petrochemical University of Vocational Technology,Lanzhou 730000,China)

机构地区：[1]兰州石化职业技术大学机械工程学院,甘肃兰州730000

出　　处：《兰州工业学院学报》2024年第5期91-95,共5页Journal of Lanzhou Institute of Technology

基　　金：兰州石化职业技术大学科研究项目(2023KY-08)。

摘　　要：为改善锂离子电池的循环以及倍率快充性能需要对LiMn_(0.6)Fe_(0.4)PO_(4)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LiMn_(0.6)Fe_(0.4)PO_4界面处锂离子扩散速率和电化学反应速率,改善LiMn_(0.6)Fe_(0.4)PO_(4)的循环和低温性能。In order to improve the cycling and rate fast charging performance of Lithium-ion batteries,LiMn_(0.6)Fe_(0.4)PO_(4) 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 diffusion coefficient and electronic conductivity,which can significantly improve the lithium-ion diffusion rate and electro-chemical reaction rate at the LiMn_(0.6)Fe_(0.4)PO_(4) interface,and improve the cycling and low-temperature performance of LiMn_(0.6)Fe_(0.4)PO_(4).

关 键 词：锂离子电池 磷酸锰铁锂材料 包覆改性 性能优化 

分 类 号：TM912[电气工程—电力电子与电力传动]