期刊
ELECTROCHIMICA ACTA
卷 54, 期 20, 页码 4631-4637出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2009.03.007
关键词
LiFePO4 thin film; Radio frequency magnetron sputtering; Chemical diffusion coefficient; Cyclic voltammetry; Potentiostatic intermittent titration technique; Electrochemical impedance spectroscopy
资金
- Mie University
- Genesis Research Institute, Nagoya, Japan
LiFePO4 thin films were prepared by radio frequency (RF) magnetron sputtering and were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and atomic force microscope (AFM). Li-ion chemical diffusion coefficients, (D) over bar (Li). were measured by potentiostatic intermittent titration technique (PITT), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). The effects of Ag content, film thickness, and film orientation on the electrochemical performance and Li-ion chemical diffusion coefficients of the LiFePO4 thin films were investigated. (D) over bar (Li) values were measured using the liquid electrolyte and the solid electrolyte, and the obtained values were discussed. The (D) over bar (Li) values by PITT and EIS were in the range of 10(-14) to 10(-12) and 10(-15) to 10(-12) cm(2) s(-1), respectively and that by CV was in the order of 10(-14) cm(2) s(-1). (C) 2009 Elsevier Ltd. All rights reserved.
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