摘要
Dual-mode electron paramagnetic resonance(EPR)spectroscopy was employed to analyze redox mechanisms in lithium cobalt oxide LiCoO_(2)(LCO)cathode material during delithiation and lithiation.It was found that the O_(3)-II could not fully convert back to the pristine O_(3) -I phase while oxygen vacancies quickly generate and accumulate during the cycling.Our study paves the way for better understanding the doping effects of different elements on LiCoO_(2) in the future.
基金
the National Natural Science Foundation of China(Nos.21872055,22172049,21874045)
Shanghai Science and technology innovation action plan(No.19142202900)
BASF,Fundamental Research Funds for Central Universities and Open Foundation of ECNU(42125102)
ECNU multifunctional platform for innovation(EPR).
