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- Title
Degradation of CoO anode in rechargeable lithium-ion battery: a semi-empirical approach to the effect of conducting material content.
- Authors
Choi, Woo-Sung; Hwang, Sooyeon; Chang, Wonyoung; Shin, Heon-Cheol
- Abstract
A large amount of conducting materials has typically been blended with transition metal oxides (MO, M = Fe, Co, Ni, Cu), and their electrochemical properties as the anode in lithium-ion batteries have been studied. Here, we report that a higher content of the conducting material results in poorer cycling stability of CoO. From the analysis of the cumulative irreversible capacity loss, a high content of conducting material is proven to promote irreversible electron consumption for the growth of a polymeric surface layer which is the origin of degradation. Furthermore, its formation is mathematically modeled on the basis of the Butler-Volmer relation. From the physical parameters of the polymeric surface layer determined by fitting the model to the experimental data, the degradation mechanism of CoO is discussed.
- Subjects
LITHIUM-ion batteries; COBALT oxides; EMPIRICAL research; TRANSITION metal oxides; CHEMICAL decomposition
- Publication
Journal of Solid State Electrochemistry, 2016, Vol 20, Issue 2, p345
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-015-3050-1