In situ electron microscopy and X-ray photoelectron spectroscopy for high capacity anodes in next-generation ionic liquid-based Li batteries
In situ electron microscopy and X-ray photoelectron spectroscopy for high capacity anodes in next-generation ionic liquid-based Li batteries
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DOI：
10.1016/j.electacta.2018.05.081
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发表时间：
2018-07
影响因子：
6.6
通讯作者：
T. Tsuda;A. Imanishi;Teruki Sano;Amane Sawamura;Toshiki Kamidaira;Chih-Yao Chen;S. Uchida;Shohei Kusum
中科院分区：
文献类型：
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作者：
T. Tsuda;A. Imanishi;Teruki Sano;Amane Sawamura;Toshiki Kamidaira;Chih-Yao Chen;S. Uchida;Shohei Kusum
基于离子液体的电子显微镜技术，利用离子液体在真空下的高稳定性和抗静电性，制备了具有实际锂电池所有成分的锂电池单元，并进行了原位电子显微镜观察。在锂电池中观察到各种有趣的阳极行为。例如，Si薄片活性材料可以电化学地储存Li（I），导致形态改变为带状或各向同性膨胀结构。令人惊讶的是，对Si材料的任何损坏都没有被纳米级成像识别出来，因为薄层结构可以在锂化过程中自发地释放内应力。此外，直接观察了Li金属的沉积过程，类似的方法可以应用于原位X射线光电子能谱分析。
Based on electron microscope techniques developed for ionic liquids (ILs), which have both high stability under vacuum and an antistatic nature, specially-designed Li battery cells with all components contained in actual Li batteries were fabricated forin situelectron microscope observation. Various interesting anode behaviors in the Li battery were observed. For example, Si thin flake active material can store Li(I) electrochemically, causing the morphology to change into a ribbon-like or isotropic expanded structure. Surprisingly any damage to the Si material was not recognized by nanoscale imaging because of the thin layer structure that can release internal stress spontaneously during lithiation. In addition, the Li metal deposition process was directly observed and a similar approach can be applied toin situX-ray photoelectron spectroscopic analysis.