In Situ SEM Observation of Structured Si/C Anodes Reactions in an Ionic-Liquid-Based Lithium-Ion Battery
In Situ SEM Observation of Structured Si/C Anodes Reactions in an Ionic-Liquid-Based Lithium-Ion Battery
复制标题
DOI：
10.3390/app9050956
复制
发表时间：
2019-03
期刊：
影响因子：
--
通讯作者：
Huifeng Shi;Xianqiang Liu;Rui Wu;Yijing Zheng;Yonghe Li;Xiaopeng Cheng;Wilhelm Pfleging;Yuefei Zhang
中科院分区：
文献类型：
--
作者：
Huifeng Shi;Xianqiang Liu;Rui Wu;Yijing Zheng;Yonghe Li;Xiaopeng Cheng;Wilhelm Pfleging;Yuefei Zhang
原位扫描电子显微镜（SEM）提供了一个很好的方式来研究在锂化和脱锂过程中的结构演变。本文采用扫描电镜原位观察了三维线结构/非结构Si/C复合电极的动态形貌演变。研究揭示了三维线结构阳极大充电容量的微观结构起源。基于该机理，提出了三维线结构阳极的粗优化方法。这些结果揭示了在研究现实的散装电池和设计3D电极结构时使用原位SEM技术的独特优势。
In situ scanning electron microscopy (SEM) offers a good way to investigate the structural evolution during lithiation and delithiation processes. In this paper, the dynamical morphological evolution of 3D-line-structured/unstructured Si/C composite electrodes was observed by in situ SEM. The investigation revealed the microstructural origin of large charge capacity for 3D-line-structured anodes. Based on this proposed mechanism, a coarse optimization of 3D-line-structured anodes was proposed. These results shed light on the unique advantages of using an in situ SEM technique when studying realistic bulk batteries and designing 3D electrode structures.