Glucose-Derived Porous Carbon-Coated Silicon Nanowires as Efficient Electrodes for Aqueous Micro-Supercapacitors

In this study, we report on carbon coating of vertically aligned silicon nanowire (SiNWs) arrays via a simple hydrothermal process using glucose as carbon precursor. Using this process, a thin carbon layer is uniformly deposited on the SiNWs. Under optimized conditions, the coated SiNWs electrode sh...

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Published inACS applied materials & interfaces Vol. 8; no. 7; pp. 4298 - 4302
Main Authors Devarapalli, Rami Reddy, Szunerits, Sabine, Coffinier, Yannick, Shelke, Manjusha V, Boukherroub, Rabah
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 24.02.2016
Subjects
hydrothermal
glucose precursor
microsupercapacitors
silicon nanowires
carbon coating
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Summary:In this study, we report on carbon coating of vertically aligned silicon nanowire (SiNWs) arrays via a simple hydrothermal process using glucose as carbon precursor. Using this process, a thin carbon layer is uniformly deposited on the SiNWs. Under optimized conditions, the coated SiNWs electrode showed better electrochemical energy storage capacity as well as exceptional stability in aqueous system as compared to uncoated SiNWs. The as-measured capacitance reached 25.64 mF/cm2 with a good stability up to 25000 charging/discharging cycles in 1 M Na2SO4 aqueous solution.
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ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.5b11240