Modification of LiMn_(0.6)Fe_(0.4)PO_(4)lithium-ion battery cathode materials with a fluorine-doped carbon coating  

作　　者：Debao Pan Ziyuan Liu Chengping Li Rundong Wan Jinsong Wang Jiangzhao Chen Ding Wang Jinkun Liu Yingjie Zhang Jianhong Yi Rui Bao Zhengfu Zhang Peng Dong 

机构地区：[1]Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China [2]Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China

出　　处：《Particuology》2024年第9期278-287,共10页颗粒学报（英文版）

基　　金：Major Science and Technology Projects of Yunnan Province(grant No.202202AG050003).

摘　　要：In this study,glucose and NH4F were utilized as sources of carbon and fluorine,respectively,for the synthesis of LiMn_(0.6)Fe_(0.4)PO_(4)(LMFP)nanoscales.These nanoscales were subsequently modified with varying levels of fluorine-doped carbon through co-precipitation and mechanical ball milling processes.The LMFP,incorporating carbon and varying levels of fluoride ions,exhibit higher specific discharge capacities at 0.2 Cand electrochemical characteristics compared to the original LMFP coated solely with carbon.The inclusion of fluorine-doped carbon in the composite material creates numerous pathways for expeditious electron transfer.Moreover,the partial formation of metal fluoride at the interface between the surface of LMFP and the layer of carbon coating doped with fluorine enhances the reduction in the charge-transfer resistance.The modified ferromanganese phosphate cathode material reveals an outstanding discharge capacity displaying a reversible discharge specific capacity value of 131.73 mA h g^(−1)at 10C and 154.6 mA h g^(−1)at 0.2C,due to its unique structure.

关 键 词：Lithium manganese iron phosphate ANODE Electrochemical Fluorine-doped carbon 

分 类 号：TM912[电气工程—电力电子与电力传动]