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Issue 7, 2012
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Improving the cycling stability of silicon nanowire anodes with conducting polymer coatings

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Abstract

For silicon nanowires (Si NWs) to be used as a successful high capacity lithium-ion battery anode material, improvements in cycling stability are required. Here we show that a conductive polymer surface coating on the Si NWs improves cycling stability; coating with PEDOT causes the capacity retention after 100 charge–discharge cycles to increase from 30% to 80% over bare NWs. The improvement in cycling stability is attributed to the conductive coating maintaining the mechanical integrity of the cycled Si material, along with preserving electrical connections between NWs that would otherwise have become electrically isolated during volume changes.

Graphical abstract: Improving the cycling stability of silicon nanowire anodes with conducting polymer coatings

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Supplementary files

Article information


Submitted
21 Feb 2012
Accepted
24 Apr 2012
First published
25 Apr 2012

Energy Environ. Sci., 2012,5, 7927-7930
Article type
Communication

Improving the cycling stability of silicon nanowire anodes with conducting polymer coatings

Y. Yao, N. Liu, M. T. McDowell, M. Pasta and Y. Cui, Energy Environ. Sci., 2012, 5, 7927
DOI: 10.1039/C2EE21437G

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