期刊
JOURNAL OF POWER SOURCES
卷 157, 期 1, 页码 471-476出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2005.07.050
关键词
LiMn2O4; sol-gel; thin-film electrode; rechargeable lithium batteries; diffusion coefficient
LiMn2O4 thin film (I mu m thick) was prepared on a gold substrate by the PVP sol-gel method. The electrochemical properties of the thin-film electrode were studied in an electrolyte I mol dm(-3) LiClO4/(ethylenecarbonate + diethyl carbonate). The prepared LiMn2O4 showed a good charge-discharge performance, and the capacity fade was ca. 20% during 200 cycles. The Li+ ion diffusion in the LiMn2O4 thin film was investigated by means of potentiostatic intermittent titration technique and electrochemical impedance spectroscopy. The chemical diffusion coefficients were estimated to be 10(-8) to 10(-10) cm(2) S-1. (c) 2005 Elsevier B.V. All rights reserved.
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