Nano Archive

High capacity Li ion battery anodes using Ge nanowires

Chan, Candace K. and Zhang, Xiao Feng and Cui, Yi (2008) High capacity Li ion battery anodes using Ge nanowires. NANO LETTERS, 8 (1). pp. 307-309.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl0727157

Abstract

Ge nanowire electrodes fabricated by using vapor-liquid-solid growth on metallic current collector substrates were found to have good performance during cycling with Li. An initial discharge capacity of 1141 mA-h/g was found to be stable over 20 cycles at the C/20 rate. High power rates were also observed up to 2C with Coulombic efficiency > 99%. Structural characterization revealed that the Ge nanowires remain intact and connected to the current collector after cycling. Nanowires connected directly to the current collector have facile strain relaxation and material durability, short Li diffusion distances, and good electronic conduction. Thus, Ge nanowire anodes are promising candidates for the development of high-energy-density lithium batteries.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Technology > Nanotechnology and energy applications
Material Science > Nanochemistry
ID Code:462
Deposited By:Farnush Anwar
Deposited On:03 Dec 2008 13:43
Last Modified:20 Jan 2009 16:27

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