商用LiCoO2电池的疲劳过程:原位中子衍射和电化学研究

2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE) Pub Date : 2012-09-01 DOI:10.1109/OMEE.2012.6464826

O. Dolotko, A. Senyshyn, M.J. Muhlbauer, K. Nikolowski, H. Ehrenberg

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引用次数: 0

摘要

采用原位高分辨率中子粉末衍射和电化学分析方法研究了商用LiCoO2(18650型)电池的疲劳过程。在25°C和50°C的不同循环条件下，研究了正极材料和负极材料在完全充电和完全放电状态下的电化学和结构行为。高分辨率中子粉末衍射使我们观察到LiCoO2阴极和石墨阳极同时发生变化，这与电池运行过程中锂的脱/插过程有关。利用中子射线照相和层析成像技术，在微米尺度上可视化了电池组织的详细特征及其演变的细节。

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Fatigue processes in commercial LiCoO2 batteries: In situ neutron diffraction and electrochemical study

In situ high-resolution neutron powder diffraction along with electrochemical analysis was used to study fatigue processes in commercial LiCoO2 (18650-type) batteries. The electrochemical and structural behavior of cathode and anode materials in fully charged and discharged states has been studied for cells exhibiting different cycling at 25°C and 50°C. High-resolution neutron powder diffraction leads us to observe simultaneous changes in LiCoO2 cathode and graphitic anode, which are related to lithium de-/intercalation processes during the battery operation. Detailed features of the battery organization and details of its evolution on a micrometer scale have been visualized using neutron radiography and tomography.

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2012 IEEE International Conference on Oxide Materials for Electronic Engineering (OMEE)

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