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- Title
Electrochemical impedance study of LiCoO cathode reactions in a lithium ion cell incorporating a reference electrode.
- Authors
Mendoza-Hernandez, Omar; Ishikawa, Hiroaki; Nishikawa, Yuuki; Maruyama, Yuki; Sone, Yoshitsugu; Umeda, Minoru
- Abstract
Kinetic characteristics of LiCoO cathode materials are studied using a Li-ion secondary cell incorporating a reference electrode. By carrying out electrochemical impedance spectroscopy (EIS) measurements at different state of charges (SOCs) and temperatures and obtaining d Q/d E vs. E curves, the activation energy, pre-exponential factor, and reaction rate constant of Li-ion insertion/deinsertion reactions are analyzed as a function of cathode potential. The kinetic behavior of Li-ion conduction, Li-ion solvation/desolvation, and charge transfer reactions of LiCoO and its dependency on the structural changes of LiCoO are studied. The charge transfer, Li-ion conduction, and Li-ion solvation/desolvation reactions exhibited a dependency on the structural changes of the cathode material.
- Subjects
CATHODE efficiency; LITHIUM-ion batteries; ELECTROCHEMICAL analysis; IMPEDANCE spectroscopy; DESOLVATION
- Publication
Journal of Solid State Electrochemistry, 2015, Vol 19, Issue 4, p1203
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-015-2741-y