期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：153
期号：4
页码：042019
DOI：10.1088/1755-1315/153/4/042019
语种：English
出版社：IOP Publishing
摘要：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.
