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- Title
Electrochemical kinetics of nanosized Ag and AgO thin films prepared by radio frequency magnetron sputtering.
- Authors
Xie, Jian; Imanishi, Nobuyuki; Hirano, Atsushi; Takeda, Yashuo; Yamamoto, Osamu; Zhao, Xin-Bing; Cao, Gao-Shao
- Abstract
Ag and AgO thin films have been prepared by radio frequency magnetron sputtering on Cu substrates and have been characterized by X-ray diffraction, scanning electron microscope and atomic force microscope. The electrochemical performance of the thin films has been studied by galvanostatic cycling and cyclic voltammetry. The potential dependence of Li-ion chemical diffusion coefficients, $$ {\widetilde{D}_{\text{Li}}} $$, of the films has been determined by galvanostatic intermittent titration technique and electrochemical impedance spectroscopy. It is found that Li-ion chemical diffusion coefficients of the Ag film range from 10 to 3 × 10 cm s. The Ag/LiO composite that is formed from AgO after the first cycle exhibits higher $$ {\widetilde{D}_{\text{Li}}} $$ values than the Ag film, especially at a low Li-intercalation content. The phase transitions in the two-phase region cause a significant decrease of chemical diffusion coefficients.
- Subjects
SILVER; SILVER oxide; SCANNING electron microscopes; ATOMIC force microscopy; MAGNETRON sputtering
- Publication
Journal of Solid State Electrochemistry, 2011, Vol 15, Issue 9, p2031
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-010-1228-0