Diamond-coated silicon nanowires for enhanced micro-supercapacitor with ionic liquids

Author

Gund, G.S. ; Dubal, D.P. ; Aradilla, D. ; Mueller-Sebert, W. ; Bidan, G. ; Gaboriau, D. ; Gentile, P. ; Schubert, T.J.S. ; Wimberg, J. ; Sadki, S. ; Gomez-Romero, P.

Author_Institution

Catalan Inst. of Nanosci. & Nanotechnol., Barcelona, Spain

fYear

2015

fDate

28-30 May 2015

Firstpage

1125

Lastpage

1128

Abstract

Silicon nanowires (SiNWs) and diamond-coated SiNWs (D@SiNWs) on highly n-doped silicon wafer substrates were prepared through standard chemical vapor deposition (CVD) method as electrodes for micro-supercapacitors. The surface of electrodes exhibited uniform distribution of SiNWs on silicon wafer and continuous diamond coating on SiNWs. Electrochemical measurements were carried out in order to test the combined effect of using Ionic Liquid electrolytes and diamond coating on SiNWs on energy storage performance. Optimal values of areal capacitance, energy density and power densities were 317 μF cm^-2, 0.13 μWh cm^-2 and 150 μW cm^-2, respectively. So, the work reported here confirms the suitability and compatibility of D@SiNWs electrode materials and ionic liquid electrolytes for the fabrication of high-performing and robust micro-supercapacitors.

Keywords

chemical vapour deposition; chemical variables measurement; diamond; doping; electrochemical electrodes; electrolytes; nanowires; silicon; supercapacitors; C-Si; CVD method; areal capacitance; capacitance 317 muF; chemical vapor deposition; diamond-coated SiNW; diamond-coated silicon nanowires; electrochemical measurements; electrode materials; energy density; energy storage performance; ionic liquid electrolytes; ionic liquids; microsupercapacitor; n-doped silicon wafer substrates; power densities; Coatings; Current measurement; Electrodes; Europe; Heating; Physics; Chemical vapor deposition; Diamond coated silicon nanowires; Micro-supercapacitor;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Instrumentation and Control (ICIC), 2015 International Conference on

Conference_Location

Pune

Type

conf

DOI

10.1109/IIC.2015.7150916

Filename

7150916