Correlation of AC-impedance and in situ X-ray spectra of LiCoO2.
In-situ X-ray and AC-impedance spectra have been obtained simultaneously during the deintercalation of lithium from LiCoO2 using a specially designed electrochemical cell. The AC-dispersions have been correlated with the cell parameters obtained from the X-ray spectra. The correlation confirms previous hypothesis on the interpretation of the AC-dispersions in terms of an equivalent circuit comprising an element that relates the change of the intrinsic electronic conductivity, occurring at the early stages of deintercalation, to the semiconductor to metal transition caused by the change of the cell parameters.
Nobili
Francesco
F
Dipartimento di Scienze Chimiche, Università di Camerino. Via S. Agostino 1, Camerino 62032, Italy.
Dsoke
Sonia
S
Minicucci
Marco
M
Croce
Fausto
F
Marassi
Roberto
R