A hollow silicon nano-spheres for the anode of Li-battery
陳昱帆(Yu-Fan Chen)1*, 陳世偉(Shi-Wei Chen)3, 李志浩(Chih-Hao Lee)2
1Master program of Science and Technology of Synchrotron Light Source, National Tsing Hua University, Hsinchu, Taiwan
2Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan
3National Synchrotron Radiation Research Center, Hsinchu, Taiwan
* presenting author:昱帆陳, email:chenyufan0407@yahoo.com.tw
Silicon with a high theoretical capacity, up to 4200 mAh/g, and relatively low operation potential is a potential material used as the anode of next generation Li-ion batteries. However, large volume expansion of silicon during lithiation/delithiation process hinders its issue practice application. Artificial nano-structure can effectively overcome the of volume expansion. In this study, we thus synthesize hollow silicon nano-spheres as the anode of Li-ion batteries, observing the volume variation in-situ by transmission x-ray microscopy with a synchrotron source. Furthermore, x-ray diffraction, scattering and absorption techniques are utilized to explore the atomic structure of hollow silicon nano-spheres as during the operation in detail. The mechanism of volume expansion of silicon thus can be explored clearly. Results will be very useful to design new anode material of next generation Li-ion batteries. Also the practice application of silicon hollow nano-sphere is well evidenced in this study.

Keywords: Hollow silicon nano-spheres