Thermal stability of LiFePO4/C-LiMn2O4 blended cathode materials

Thermal stability of LiFePO4/C-LiMn2O4 blended cathode materials

Safety is important to lithium ion battery materials. The thermal stability of LiFePOa/C-LiMn204 blended cathode materials is characterized by using TG, XRD, and SEM etc. The results show that LiFePO4/C-LiMn2O4 possesses a worse thermal stability than pure spinel LiMn2O4 and pure olivine LiFePO4/C....

Full description

Saved in:
Bibliographic Details
Published in:Science China. Technological sciences Vol. 60; no. 1; pp. 58 - 64
Main Authors: Du, YuanChao, Huang, XiaoPeng, Zhang, KeYu, Liang, Feng, Li, QiuXia, Yao, YaoChun, Dai, YongNian
Format: Journal Article
Language:English
Published: Beijing Science China Press 2017
Springer Nature B.V
Subjects:
Cathodes
Chemical reactions
Electrode materials
Engineering
Fe2O3
LiFePO4／C
Lithium batteries
Lithium ions
Mn3O4
Thermal stability
尖晶石LiMn2O4
正极材料
混纺
热稳定性
磷酸铁锂
blended cathode materials
LiFePO
C-LiMn
thermal stability
impurity phases
O
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Safety is important to lithium ion battery materials. The thermal stability of LiFePOa/C-LiMn204 blended cathode materials is characterized by using TG, XRD, and SEM etc. The results show that LiFePO4/C-LiMn2O4 possesses a worse thermal stability than pure spinel LiMn2O4 and pure olivine LiFePO4/C. When LiFePO4/C-LiMn2O4 blended cathode materials are sintered at 500℃ under Ar atmosphere, the sintered cathode materials emit O2, and appear impurity phases （Li3PO4, Fe2O3, Mn3O4）. It is deduced that some chemical reactions take place between different materials, which leads to a worse discharge specific capacity. LiFePO4/C-LiMn2O4 blended cathode materials, therefore, need to be managed and controlled strictly for the sake of ther- mal stability and safety.
Bibliography:LiFePO4/C-LiMn2O4 blended cathode materials, impurity phases, thermal stability
DU YuanChao1, HUANG XiaoPeng1, ZHANG KeYu1, LIANG Feng1, LI QiuXia2, YAO YaoChun1. DAI YongNian1 （1Faculty of Metallurgical and Energy Engineering, National Engineering Laboratory for Vacuum Metallurgy, Engineering Laboratory for Advanced Batteries and Materials of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China; 2Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, China）
11-5845/TH
Safety is important to lithium ion battery materials. The thermal stability of LiFePOa/C-LiMn204 blended cathode materials is characterized by using TG, XRD, and SEM etc. The results show that LiFePO4/C-LiMn2O4 possesses a worse thermal stability than pure spinel LiMn2O4 and pure olivine LiFePO4/C. When LiFePO4/C-LiMn2O4 blended cathode materials are sintered at 500℃ under Ar atmosphere, the sintered cathode materials emit O2, and appear impurity phases （Li3PO4, Fe2O3, Mn3O4）. It is deduced that some chemical reactions take place between different materials, which leads to a worse discharge specific capacity. LiFePO4/C-LiMn2O4 blended cathode materials, therefore, need to be managed and controlled strictly for the sake of ther- mal stability and safety.
ISSN:1674-7321
1869-1900
DOI:10.1007/s11431-016-0329-7