Visualization of Functional Components in a Lithium Silicon Titanium Phosphate–Natural Graphite Composite Anode,ACS Applied Energy Materials

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Visualization of Functional Components in a Lithium Silicon Titanium Phosphate–Natural Graphite Composite Anode
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-03-11 00:00:00 , DOI: 10.1021/acsaem.9b02045
Hongjun Kim ₁ , Jimin Oh _{1,

2} , Gun Park ₁ , Albina Jetybayeva ₁ , Jaegyu Kim ₁ , Young-Gi Lee ₂ , Seungbum Hong ₁

Affiliation

Here, a multimodal scanning probe microscopy study of a composite anode with a dispersed lithium silicon titanium phosphate (LSTP) lithium ion conductor for all-solid-state batteries is presented. Using electrochemical strain microscopy (ESM) and lateral force microscopy (LFM), electromechanical response and friction force dependence as a function of the measurement parameters such as the tip loading force and AC drive voltage are analyzed. The sensitivities of friction force and ESM amplitude are found to be valid markers to identify each component in the composite anode. Furthermore, the distribution of active ionic sites of lithium ions is visualized in the comingled region of LSTP and binder materials based on Pearson’s correlation analysis between nanoscale ESM and LFM results. With the suggested technique, various components of composite electrodes can be directly visualized and distinguished in ambient conditions, with their properties being measured simultaneously. These methods will provide insights into the optimal conditions of composite electrodes and allow for developing next-generation all-solid-state batteries.

中文翻译：

磷酸锂硅钛-天然石墨复合阳极中功能部件的可视化

在这里，提出了一种用于全固态电池的具有分散的锂硅钛磷酸盐（LSTP）锂离子导体的复合阳极的多峰扫描探针显微镜研究。使用电化学应变显微镜（ESM）和横向力显微镜（LFM），分析了机电响应和摩擦力随测量参数（如吸头负载力和交流驱动电压）的变化。发现摩擦力和ESM振幅的灵敏度是识别复合阳极中每个成分的有效标记。此外，基于皮尔逊在纳米级ESM和LFM结果之间的相关性分析，可以看到LSTP和粘合剂材料的混合区域中锂离子活性离子位点的分布。使用建议的技术，复合电极的各种组件可以在环境条件下直接可视化和区分，同时可以测量其性能。这些方法将提供有关复合电极最佳条件的见识，并允许开发下一代全固态电池。

更新日期：2020-03-11

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