Journal
NANO LETTERS
Volume 14, Issue 4, Pages 1843-1847Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl404609a
Keywords
Porous silicon nanowire; microsupercapacitor; carbon coating; ionic liquid
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Funding
- National Science Foundation [EEC-0832819, DMR-1207053]
- China Scholarship Council [201206170078]
- Project BioNiMed - Fondazione Cariparma
- Direct For Mathematical & Physical Scien [1207053] Funding Source: National Science Foundation
- Division Of Materials Research [1207053] Funding Source: National Science Foundation
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Microsupercapacitors are attractive energy storage devices for integration with autonomous microsensor networks due to their high-power capabilities and robust cycle lifetimes. Here, we demonstrate porous silicon nanowires synthesized via a lithography compatible low-temperature wet etch and encapsulated in an ultrathin graphitic carbon sheath, as electrochemical double layer capacitor electrodes. Specific capacitance values reaching 325 mF cm(-2) are achieved, representing the highest specific ECDL capacitance for planar microsupercapacitor electrode materials to date.
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