Degradation of Co3O4 anode in rechargeable lithium-ion battery: a semi-empirical approach to the effect of conducting material content
- Degradation of Co3O4 anode in rechargeable lithium-ion battery: a semi-empirical approach to the effect of conducting material content
- 장원영; 황수연; 최우성; 신헌철
- conducting material; solid electrolyte interface; Co3O4
- Issue Date
- Journal of solid state electrochemistry
- VOL 20, NO 2, 345-352
- A large amount of conducting materials has typically been blended with transition metal oxides (MxOy, 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 Co3O4. 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 Co3O4 is discussed.
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