X-Ray Diffraction Computed Tomography for Structural Analysis of Electrode Materials in Batteries
X-Ray Diffraction Computed Tomography for Structural Analysis of Electrode Materials in Batteries
复制标题
DOI：
10.1149/2.0771507jes
复制
发表时间：
2015-01-01
影响因子：
3.9
通讯作者：
Billinge, Simon J. L.
中科院分区：
文献类型：
--
作者：
Jensen, Kirsten M. O.;Yang, Xiaohao;Billinge, Simon J. L.
我们首次报告了使用 X 射线衍射与计算机断层扫描相结合来提供纽扣锂离子电池和商用镍/氢 AAA 电池的定量信息。该技术可以获取结构信息，并开辟了跟踪操作过程中纳米结构变化的可能性。对于圆柱形缠绕的标准 AAA Ni/MH 电池，我们能够绘制复杂几何形状中的所有不同相，包括阳极、阴极、集电器和外壳，以及粘合剂和隔膜等非晶相。以锂离子纽扣电池为例，我们展示了如何使用 X 射线衍射断层扫描数据来绘制阴极薄膜上 LiCoO2 颗粒的晶体结构。我们的结果表明 LiCoO2.微粒表现出高度的择优取向，但这种效应在薄膜上并不均匀，这可能会影响电化学性能。 (C) 作者 2015 年。ECS 出版。版权所有。
We report the use of X-ray diffraction in combination with computed tomography to provide quantitative information of a coin cell Li-ion battery and a commercial Ni/MH AAA battery for the first time. This technique allows for structural information to be garnered and opens up the possibility of tracking nanostructural changes in operandi. In the case of the cylindrically wound, standard AAA Ni/MH cell, we were able to map all the different phases in the complex geometry, including anode, cathode, current collector and casing, as well as amorphous phases such as the binder and separator. In the case of a Li-ion coin cell battery, we show how the X-ray diffraction tomography data can be used to map crystal texture of the LiCoO2 particles over the cathode film. Our results reveal that the LiCoO2. microparticles show a high degree of preferred orientation, but that this effect is not homogenous over the film, which may affect the electrochemical properties. (C) The Author(s) 2015. Published by ECS. All rights reserved.