Electrochemical and Spectroscopic Characterization of LiCoO2 Thin-Film as Model Electrode
Electrochemical and Spectroscopic Characterization of LiCoO2 Thin-Film as Model Electrode
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LiCoO2 薄膜作为模型电极的电化学和光谱表征
DOI：
10.1149/2.1151409jes
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发表时间：
2014
影响因子：
3.9
通讯作者：
Z. Ogumi
中科院分区：
文献类型：
--
作者：
D. Takamatsu;Y. Koyama;Y. Orikasa;S. Mori;Takayuki Nakatsutsumi;T. Hirano;H. Tanida;H. Arai;Y. Uchimoto;Z. Ogumi
LiCoO 2 thin-films deposited on various platinum substrates, ie single crystals of Pt (100), Pt (110) and Pt (111), and polycrystals (Pt-poly), are characterized by cyclic voltammetry (CV), X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) to discuss appropriateness of thin-film modeling of composite electrodes from the electrochemical and spectroscopic viewpoints. Structural characterization indicates (001) orientation of LiCoO 2/Pt (100) and LiCoO 2/Pt (111) thin-films, and (104) orientation of LiCoO 2/Pt (110). LiCoO 2/Pt-poly thin-film is polycrystalline with a broad distribution of tilt angle of LiCoO 2 c-axis. The LiCoO 2/Pt (100) and LiCoO 2/Pt-poly thin-films exhibit reversible CV behavior, while the other two show irreversible behavior. The structural and electrochemical characterization suggests that the c-axis tilt angle is not the predominant factor for reversible electrochemical behavior of the LiCoO 2 electrodes. Instead, polycrystalline structure with weak orientation seems to be preferable for high reversibility. Orientation dependence of XAS also indicates that the LiCoO 2/Pt-poly thin-film shows similar spectrum to LiCoO 2 powder. Thin-films having strong orientation lead to strong dependence of XAS spectra, and this can result in lack of spectroscopic information. From both the electrochemical and XAS viewpoints, the LiCoO 2/Pt-poly thin-film having the polycrystalline structure with the broad distribution of the c-axis tilt angle is the most suitable for the thin-film modeling of the composite electrodes.
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影响因子：
3.2
作者：
Jian Xie;N. Imanishi;A. Hirano;M. Matsumura;Y. Takeda;O. Yamamoto
通讯作者：
Jian Xie;N. Imanishi;A. Hirano;M. Matsumura;Y. Takeda;O. Yamamoto
影响因子：
3.2
作者：
Xie, Jian;Imanishi, Nobuyuki;Yamamoto, Osamu
通讯作者：
Yamamoto, Osamu
影响因子：
9.2
作者：
M. Hirayama;N. Sonoyama;T. Abe;Machiko Minoura;Masumi Ito;Daisuke Mori;A. Yamada;R. Kanno;T. Terashima;M. Takano;K. Tamura;J. Mizuki
通讯作者：
M. Hirayama;N. Sonoyama;T. Abe;Machiko Minoura;Masumi Ito;Daisuke Mori;A. Yamada;R. Kanno;T. Terashima;M. Takano;K. Tamura;J. Mizuki
影响因子：
9.2
作者：
Iriyama, Y;Inaba, M;Ogumi, Z
通讯作者：
Ogumi, Z