Operando Visualization of Morphological Dynamics in All‐Solid‐State Batteries,Advanced Energy Materials

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Operando Visualization of Morphological Dynamics in All‐Solid‐State Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2019-07-30 , DOI: 10.1002/aenm.201901547
Xiaohan Wu ₁ , Juliette Billaud ₁ , Iwan Jerjen ₂ , Federica Marone ₂ , Yuya Ishihara _{3,

4} , Masaki Adachi ₅ , Yoshitaka Adachi ₆ , Claire Villevieille ₁ , Yuki Kato _{3,

5}

Affiliation

All‐solid‐state batteries (SSBs) are considered as attractive options for next‐generation energy storage owing to the favorable properties (unit transference number and thermal stabilities) of solid electrolytes. However, there are also serious concerns about mechanical deformation of solid electrolytes leading to the degradation of the battery performance. Therefore, understanding the mechanism underlying the electromechanical properties in SSBs is essentially important. Here, 3D and time‐resolved measurements of an all‐solid‐state cell using synchrotron radiation X‐ray tomographic microscopy are shown. The gradient of the electrochemical reaction and the morphological evolution in the composite layer can be clearly observed. Volume expansion/compression of the active material (Sn) is strongly oriented along the thickness of the electrode. While this results in significant deformation (cracking) in the solid electrolyte region, organized cracking patterns depending on the particle size and their arrangements is also found. This study based on operando visualization therefore opens the door toward rational design of particles and electrode morphology for all‐solid‐state batteries.

中文翻译：

全固态电池形态动力学的Operando可视化

由于固态电解质的良好特性（单位转移数和热稳定性），全固态电池（SSB）被认为是下一代储能的有吸引力的选择。然而，还严重关注导致电池性能下降的固体电解质的机械变形。因此，了解SSB中机电性能的基本机制至关重要。此处显示了使用同步辐射X射线断层扫描显微镜对全固态细胞进行3D和时间分辨的测量。可以清楚地观察到复合层中电化学反应的梯度和形态演变。活性材料（Sn）的体积膨胀/压缩沿电极的厚度强烈取向。尽管这导致固体电解质区域中的显着变形（破裂），但也发现了取决于颗粒尺寸及其排列的有组织的破裂模式。因此，这项基于操作可视化的研究为全固态电池的合理设计粒子和电极形态打开了一扇门。

更新日期：2019-07-30

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