Growth of Si nanowires in porous carbon with enhanced cycling stability for Li-ion storage

JOURNAL OF POWER SOURCES

卷:250

Article

Zhao, Xiaoxu¹  Rui, Xianhong¹  Zhou, WenWen¹  Tan, Liping¹  Yan, Qingyu¹  Lu, Ziyang¹  Hng, Huey Hoon¹ 

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

关键词: Lithium ion battery;    Porous carbon;    Silicon nanowires;    Anode;   

DOI  :  10.1016/j.jpowsour.2013.11.008

来源: Elsevier

【 摘 要 】

Si nanowires are successfully grown in porous carbon by supercritical fluid-liquid-solid (SFLS) process, which show high specific capacities and charge discharge cycling stability as anode materials for Li-ion storage. The enhancement capacity and cycling stability of the Si nanowires/porous carbon composite nanostructures is attributed to the porous carbon serving as a highly conductive framework and absorption of volume changes of Si nanowires during the lithiation/delithiation process. At optimized condition, the Si nanowires/porous carbon electrodes maintain reversible capacities of 1678 mAh g(-1) for the 100th cycle at a current density of 420 mA g(-1), which is much better as compared to that of pure Si nanowires. (C) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

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