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Open Access Nano Express

New Applications of Electrochemically Produced Porous Semiconductors and Nanowire Arrays

Malte Leisner*, Ala Cojocaru, Emmanuel Ossei-Wusu, Jürgen Carstensen and Helmut Föll

Author Affiliations

Institute for Materials Science, Christian-Albrechts-University of Kiel, Kaiserstrasse 2, 24143, Kiel, Germany

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Nanoscale Research Letters 2010, 5:1502-1506  doi:10.1007/s11671-010-9669-z

Published: 15 June 2010

Abstract

The growing demand for electro mobility together with advancing concepts for renewable energy as primary power sources requires sophisticated methods of energy storage. In this work, we present a Li ion battery based on Si nanowires, which can be produced reliable and cheaply and which shows superior properties, such as a largely increased capacity and cycle stability. Sophisticated methods based on electrochemical pore etching allow to produce optimized regular arrays of nanowires, which can be stabilized by intrinsic cross-links, which serve to avoid unwanted stiction effects and allow easy processing.

Keywords:
Li ion batteries; Porous Si; Nanowires