Characterization of electrode/electrolyte interface for lithium batteries using in situ synchrotron X-ray reflectometry—A new experimental technique for LiCoO2 model electrode
Characterization of electrode/electrolyte interface for lithium batteries using in situ synchrotron X-ray reflectometry—A new experimental technique for LiCoO2 model electrode
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DOI：
10.1016/j.jpowsour.2007.03.034
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发表时间：
2007-06
影响因子：
9.2
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
中科院分区：
文献类型：
--
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
A new experimental technique was developed for detecting structure changes at electrode/electrolyte interface of lithium cell using X-ray reflectometry and two-dimensional model electrodes with a restricted lattice-plane. The electrodes were constructed with an epitaxial film of LiCoO2synthesized by pulsed laser deposition method. The orientation of the epitaxial film depends on the substrate plane; the 2D layer of LiCoO2is parallel to the SrTiO3(111) substrate [Formula: see text] , while the 2D layer is perpendicular to the SrTiO3(110) substrate [Formula: see text] . The anisotropic properties were confirmed by electrochemical measurements. Ex situ X-ray reflectivity measurements indicated that the impurity layer existed on the as-grown LiCoO2was dissolved and a new SEI layer with lower density was formed after soaking into the electrolyte. In situ X-ray reflectivity measurements indicated that the surface roughness of the intercalation (110) plane increased with applying voltages, while no significant changes in surface morphology were observed for the intercalation non-active (003) plane during the pristine stage of the charge–discharge process.
