Novel hybrid micro-supercapacitor based on conducting polymer coated silicon nanowires for electrochemical energy storage

The development of a novel hybrid symmetric micro-supercapacitor based on poly(3,4-ethylenedioxythiophene) coated silicon nanowires using an ionic liquid ( N -methyl- N -propylpyrrolidinium bis(trifluoromethylsulfonyl)imide) as an electrolyte has been demonstrated. The hybrid supercapacitor device w...

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Bibliographic Details
Published in:RSC advances 2014-01, Vol.4 (50), p.26462-26467
Main Authors: Aradilla, David, Bidan, Gérard, Gentile, Pascal, Weathers, Patrick, Thissandier, Fleur, Ruiz, Vanesa, Gómez-Romero, Pedro, Schubert, Thomas J. S., Sahin, Hülya, Sadki, Saïd
Format: Article
Language:English
Subjects:
Chemical Sciences
Coating
Condensed Matter
Conducting polymers
Density
Devices
Electric power
Electrolytes
Engineering Sciences
Materials Science
Micro and nanotechnologies
Microelectronics
Nanowires
Physics
Silicon
Voltage
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Summary:The development of a novel hybrid symmetric micro-supercapacitor based on poly(3,4-ethylenedioxythiophene) coated silicon nanowires using an ionic liquid ( N -methyl- N -propylpyrrolidinium bis(trifluoromethylsulfonyl)imide) as an electrolyte has been demonstrated. The hybrid supercapacitor device was able to deliver a specific energy of 10 W h kg −1 and a maximal power density of 85 kW kg −1 at a cell voltage of 1.5 V. The hybrid device exhibited long lifetime and an outstanding electrochemical stability retaining 80% of the initial capacitance after thousands of galvanostatic charge–discharge cycles at a high current density of 1 mA cm −2 . The improvement of the capacitive properties compared with the bare SiNWs was attributed to the pseudo-capacitive behavior induced by the conducting polymer coating.
ISSN:2046-2069
2046-2069
DOI:10.1039/C4RA03192J