Journal
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
Volume 4, Issue 1-2, Pages 4-6Publisher
WILEY-BLACKWELL
DOI: 10.1002/pssr.200903344
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Si nanowires can incorporate large amounts of Li without fracturing and are thus prime candidates for anodes in Li ion batteries. Anodes made from Si nanowires offer a specific capacity per gram more then 10 times larger than the present graphite standard. It is shown how optimized Si nanowire arrays embedded in Cu can be produced in a relatively simple way employing macropore etching in Si followed by chemical etching and Cu galvanic deposition. First tests of these arrays in half-cells and batteries demonstrated a substantially increased capacity, small irreversible losses and cycle stability. In particular more than 60 charge/discharge cycles could be realized without loss of capacity. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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