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

Yan Yao, Nian Liu, Matthew T. McDowell, Mauro Pasta, Yi Cui

Research output: Contribution to journalArticlepeer-review

230 Scopus citations

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. © 2012 The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)7927
JournalEnergy & Environmental Science
Volume5
Issue number7
DOIs
StatePublished - 2012
Externally publishedYes

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