Charge transfer reaction at the lithium phosphorus oxynitride glass electrolyte/lithium cobalt oxide thin film interface
Charge transfer reaction at the lithium phosphorus oxynitride glass electrolyte/lithium cobalt oxide thin film interface
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DOI：
10.1016/j.ssi.2005.02.025
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发表时间：
2005-10-01
影响因子：
3.2
通讯作者：
Ogumi, Z
中科院分区：
文献类型：
--
作者：
Iriyama, Y;Kako, T;Ogumi, Z
制备了由c轴取向LiCoO2薄膜和锂磷氮氧化物（UPON）玻璃电解质组成的全固态薄膜电池，并研究了UPON/LiCoO2界面上的电荷转移反应。 LiPON/LiCoO2 界面形成后在 473 K 下进行热处理提高了薄膜电池的反应性，与之前报道的结果非常吻合。这一改进主要是由于 UPON/LiCoO2 接口处电荷传输电阻的降低。我们发现电荷转移反应的活化能没有因热处理而改变，这表明还原不是由活化能的降低引起的。由于热处理引起了 LiPON 薄膜中化学键的变化，因此表明这些结构变化引起了 LiPON/LiCoO2 界面的一些改性，从而导致接触区域中电化学活性位点数量的增加。 (c) 2005 Elsevier B.V. 保留所有权利。
An all-solid-state thin film battery consisting of a c-axis-oriented LiCoO2 thin film and a lithium phosphorus oxynitride (UPON) glass electrolyte was fabricated, and the charge transfer reaction at the UPON/LiCoO2 interface was investigated. Thermal treatment at 473 K after the formation of the LiPON/LiCoO2 interface improved the reactivity of the film battery, in good agreement with the result previously reported. This improvement was predominantly due to a reduction in charge transfer resistance at the UPON/LiCoO2 interface. We found that the activation energy of the charge transfer reaction did not change as a result of thermal treatment, indicating that the reduction was not caused by a decrease in activation energy. Because thermal treatment induced a change in chemical bonding in the LiPON film, it is suggested that these structural changes induced some modification at the LiPON/LiCoO2 interface, which resulted in an increase in the number of electrochemically active sites in the contact area. (c) 2005 Elsevier B.V. All rights reserved.