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Silicon carbide coated silicon nanowires as robust electrode material for aqueous micro-supercapacitor.
- Source :
-
Applied Physics Letters . 4/16/2012, Vol. 100 Issue 16, p163901-163901-4. 1p. 3 Graphs. - Publication Year :
- 2012
-
Abstract
- The development of passivated silicon nanowire (SiNW) based micro-supercapacitor electrodes for on-chip applications using an environmentally benign aqueous electrolyte is reported. The SiNWs, produced by low-temperature (50 °C) electrochemical etching, corrode during charge/discharge cycling in the aqueous environment, but upon coating with a silicon carbide passivation layer, the corrosion is mitigated. The as-formed materials are in electrical contact with the substrate, requiring no additional current collector. The passivated NWs achieve capacitance values up to ∼1.7 mF/cm2 projected area (comparable to state-of-the art carbon based micro-supercapacitor electrodes), exhibit robust cycling stability, and maintain capacitive behavior over a wide range of charge/discharge rates. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SILICON carbide
*NANOSILICON
*NANOWIRES
*SUPERCAPACITORS
*AQUEOUS electrolytes
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 100
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 74465338
- Full Text :
- https://doi.org/10.1063/1.4704187