In Situ SEM Observation of Structured Si/C Anodes Reactions in an Ionic-Liquid-Based Lithium-Ion Battery

被引：15
|
作者：
Shi, Huifeng [1 ]
Liu, Xianqiang [1 ]
Wu, Rui [1 ]
Zheng, Yijing [2 ]
Li, Yonghe [1 ]
Cheng, Xiaopeng [1 ]
Pfleging, Wilhelm [2 ,3 ]
Zhang, Yuefei [1 ]
机构：
[1] Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
[2] Karlsruhe Inst Technol, Inst Appl Mat IAM AWP, D-76313 Karlsruhe, Germany
[3] KNMF, D-76344 Karlsruhe, Germany
来源：
APPLIED SCIENCES-BASEL | 2019年 / 9卷 / 05期
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
in situ scanning electron microscopy (SEM); lithium-ion battery; 3D structure; Si/C composites; NANOSTRUCTURED SILICON; PERFORMANCE; ELECTRODE; CAPACITY;
D O I：
10.3390/app9050956
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
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收藏
页数：9
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