Degradation mechanism of LiMn2O4 cathode at high charge cut-off voltages

Degradation mechanism of LiMn2O4 cathode at high cut-off voltage of 4.8 V has been investigated. Electrochemical tests of the cathode show that the rapid capacity loss due to the oxidation of electrolyte and the generation of oxygen species under high voltage operation leads to the increase of elect...

Full description

Saved in:
Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2018-05, Vol.153 (4)
Main Authors: Zhang, Feilong, Geng, Tongtong, Li, Shiyou, Peng, Fengfeng
Format: Article
Language:English
Subjects:
Cathodes
Degradation
Electrochemistry
Electron microscopes
High voltage
Lithium manganese oxides
Oxidation
Scanning electron microscopy
Thickness
Voltage
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Degradation mechanism of LiMn2O4 cathode at high cut-off voltage of 4.8 V has been investigated. Electrochemical tests of the cathode show that the rapid capacity loss due to the oxidation of electrolyte and the generation of oxygen species under high voltage operation leads to the increase of electrode resistance. In addition, a thick layer is found on the cathode surface from scanning electron microscope. The thickness of the layer increases with the increment of charge potentials.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/153/4/042019