Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (11): 1207-1212.DOI: 10.3724/SP.J.1077.2013.13125

• Research Paper • Previous Articles     Next Articles

Si Nanowire Anode Prepared by Chemical Etching for High Energy Density Lithium-ion Battery

LI Jian-Wen, ZHOU Ai-Jun, LIU Xing-Quan, LI Jing-Ze   

  1. (State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Soild-state Electronics University of Electronic Science and Technology of China, Chengdu 610054, China)
  • Received:2013-03-06 Revised:2013-04-01 Published:2013-11-20 Online:2013-10-18
  • About author:LI Jian-Wen. E-mail: lijianwen19880408@126.com
  • Supported by:

    NSFC (21073029, 51211140045); RFDP (20100185110019);Program for New Century Excellent Talents in University (NCET-10-0296); Fundamental Research Funds for the Central Universities (ZYGX2012Z003)

Abstract: Silicon nanowire arrays were fabricated by metal-assisted chemical etching of single crystal silicon wafer. Then the silicon nanowire powder was obtained via ultrasonicating from silicon wafer and utilized as the anode electrode material of lithium ion battery. The effects of Ag catalyst deposition process and the subsequent anisotropic chemical etching on the formation of silicon nanowires were systematically investigated. The redistribution of Ag particles was found during the chemical etching. The large-area silicon nanowire arrays with proper length-diameter ratio were obtained by optimizing the concentration of AgNO3, HF and H2O2 solution. The silicon nanowires exhibited the classical alloy-reaction plateaus of silicon and the specific capacity above 1800 mAh/g prior to the sixth cycle.

Key words: lithium-ion battery, high energy storage, chemical etching, silicon nanowires

CLC Number: