Selective Ultrathin Carbon Sheath on Porous Silicon Nanowires: Materials for Extremely High Energy Density Planar Micro-Supercapacitors
- 27 March 2014
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 14 (4), 1843-1847
- https://doi.org/10.1021/nl404609a
Abstract
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.Keywords
Funding Information
- National Science Foundation (EEC-0832819)
- National Science Foundation (DMR-1207053)
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