Preparation and electrochemical performance of carbon-coated LiFePO4/LiMnPO4-positive material for a Li-ion battery  

作　　者：Qiangqiang Tan Bo Yan Yuxing Xu Yunfa Chen Jun Yang 

机构地区：[1]State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China [2]University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Particuology》2017年第1期144-150,共7页颗粒学报（英文版）

基　　金：Financial support from the Knowledge Innovation Program of the Chinese Academy of Sciences （Grant No. KGCX2-YW-341） and the National Natural Science Foundation of China （Grant Nos. 21376247, 21573240） is gratefully acknowledged.

摘　　要：Lithium iron phosphate （LiFePO4）/lithium manganese phosphate （LiMnPO4）-positive material was suc- cessfully prepared through ball milling and high-temperature sintering using manganese acetate, lithium hydroxide, ammonium dihydrogen phosphate, and ferrous oxalate as raw materials. The as-prepared samples were characterized by X-ray diffraction, transmission electron microscopy, scanning elec- tron microscopy, a constant current charge-discharge test, cyclic voltammetry, and electrochemical impedance spectroscopy. The effects of lithium iron phosphate coating were also discussed. Because of its special core-shell structure, the as-prepared LiMn0.TFe0.3PO4-LiFeP04-C exhibits excellent electro- chemical performance. The discharge capacity reached 136.6 mAh/g and the specific discharge energy reached 506.9 Wh/kg at a rate of 0.1 C.Lithium iron phosphate （LiFePO4）/lithium manganese phosphate （LiMnPO4）-positive material was suc- cessfully prepared through ball milling and high-temperature sintering using manganese acetate, lithium hydroxide, ammonium dihydrogen phosphate, and ferrous oxalate as raw materials. The as-prepared samples were characterized by X-ray diffraction, transmission electron microscopy, scanning elec- tron microscopy, a constant current charge-discharge test, cyclic voltammetry, and electrochemical impedance spectroscopy. The effects of lithium iron phosphate coating were also discussed. Because of its special core-shell structure, the as-prepared LiMn0.TFe0.3PO4-LiFeP04-C exhibits excellent electro- chemical performance. The discharge capacity reached 136.6 mAh/g and the specific discharge energy reached 506.9 Wh/kg at a rate of 0.1 C.

关 键 词：LiMn1-xFexPO4 Composite Core-shell structure Positive material Li-ion battery 

分 类 号：TM912.2[电气工程—电力电子与电力传动] TG139.7[一般工业技术—材料科学与工程]