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

doi:10.3724/SP.J.1077.2013.13125

Abstract

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:

O613

LI Jian-Wen, ZHOU Ai-Jun, LIU Xing-Quan, LI Jing-Ze. Si Nanowire Anode Prepared by Chemical Etching for High Energy Density Lithium-ion Battery[J]. Journal of Inorganic Materials, 2013, 28(11): 1207-1212.

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