Selective ultrathin carbon sheath on porous silicon nanowires: materials for extremely high energy density planar micro-supercapacitors.
basic_science · Level V
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- Record sourced from PubMed, PMID 24635718.
- Also identified by DOI 10.1021/nl404609a.
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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.