Improved performance of LiMn_(0.8)Fe_(0.2)PO_(4) by addition of fluoroethylene carbonate electrolyte additive  

作　　者：Guihuang Fang Wei Chen Hongwei Yang Haisheng Fang Chuang Yu Maoxiang Wu 

机构地区：[1]Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China [2]Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [3]State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Chinese Chemical Letters》2024年第6期229-233,共5页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.51874155 and 52177214);the Fujian Provincial STS program supporting project of Chinese Academy of sciences(No.2022T3001)。

摘　　要：The addition of electrolyte additives is an effective strategy for tuning the property of the electrolyte to engineer the electrode/electrolyte interface,and there exist obvious discrepancies regarding the effect of fluoroethylene carbonate(FEC)as an electrolyte additive on the performance of cathodes.Herein FEC is introduced into the electrolyte of the LiMn_(0.8)Fe_(0.2)PO_(4)/Li cell and its effect on the properties of the LiMn_(0.8)Fe_(0.2)PO_(4) is investigated.It is found that the addition of FEC in the electrolyte has a positive effect on the performance of the LiMn_(0.8)Fe_(0.2)PO_(4) cathode,which can be attributed to the reduced products generated by the interfacial side-reactions on the LiMn_(0.8)Fe_(0.2)PO_(4) cathode surface and the decreased metal dissolution in the FEC-containing electrolyte,thanks to the higher oxidation resistance of FEC and the easier and stronger binding of FEC and PF_6^(-).

关 键 词：Lithium-ion batteries LiMn_(0.8)Fe_(0.2)PO_(4) CATHODE Electrolyte additives Fluoroethylene carbonate 

分 类 号：O646.1[理学—物理化学] TM912[理学—化学]