A Peanut Shell Inspired Scalable Synthesis of Three-Dimensional Carbon Coated Porous Silicon Particles as an Anode for Lithium-Ion Batteries

• Published in: Electrochimica acta Vol. 156; pp. 11 - 19
• Main Authors: Han, Xiang, Chen, Huixin, Liu, Jingjing, Liu, Hanhui, Wang, Peng, Huang, Kai, Li, Cheng, Chen, Songyan, Yang, Yong
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 20.02.2015
• Subjects: C/SiO2 coating; electrochemical performance; lithium-ion anode; peanut shell; porous silicon particle; porous silicon particle; peanut shell; lithium-ion anode; C/SiO2 coating; electrochemical performance
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2015.01.051

•A novel, economical ball milling and heat treatment of porous silicon based anodes was introduced to boost the electrochemical performance of Li-ion batteries.•The compact C/SiO2-coated peanut shell-like electrodes could accommodate volume change effectively.•The electrodes exhibited outstanding cycling performance and rate capacities.•Our work gives a compelling look at a novel and large-scale production method of fabricating next generation Si/C anodes for high-performance LIBs. A novel, economical ball milling and heat treatment of porous silicon based anodes was introduced to boost the electrochemical performance and cycle capacity of Li-ion batteries. The resultant peanut shell-like electrodes combined multiple advantageous features, including a continuous, flexible electrically conductive carbon network, a synergistic C/SiO2 coating layer and improved interfacial contact, in a peanut shell structure with void space. The electrodes achieved an initial discharge capacity of 1909mAhg−1 with coulombic efficiency of 88.8% as well as a high reversible capacity of 1179mAhg−1 after 120cycles at 0.1C. In addition, the material was capable of reaching a capacity of 493mAhg−1 even at the high charge rate of 4C. This work gives a compelling look at a novel and large-scale production method of fabricating next generation Si/C anodes for high-performance LIBs.