Effects of structural properties of silicon carbide-derived carbons on their electrochemical double-layer capacitance in aqueous and organic electrolytes

Fiset, Erika, Bae, Jun-Seok, Rufford, Thomas E., Bhatia, Suresh, Lu, Gao Qing and Hulicova-Jurcakova, Denisa (2014) Effects of structural properties of silicon carbide-derived carbons on their electrochemical double-layer capacitance in aqueous and organic electrolytes. Journal of Solid State Electrochemistry, 18 3: 703-711. doi:10.1007/s10008-013-2306-x


Author Fiset, Erika
Bae, Jun-Seok
Rufford, Thomas E.
Bhatia, Suresh
Lu, Gao Qing
Hulicova-Jurcakova, Denisa
Title Effects of structural properties of silicon carbide-derived carbons on their electrochemical double-layer capacitance in aqueous and organic electrolytes
Journal name Journal of Solid State Electrochemistry   Check publisher's open access policy
ISSN 1432-8488
1433-0768
Publication date 2014-03-01
Year available 2013
Sub-type Article (original research)
DOI 10.1007/s10008-013-2306-x
Volume 18
Issue 3
Start page 703
End page 711
Total pages 9
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2014
Language eng
Formatted abstract
High surface area silicon carbide-derived carbons (Si-CDCs) synthesized by chlorination of beta silicon carbide (βSiC) with two different particle sizes (6 μm and 50 nm) show different porosities with graphitic structure. Transmission electron microscopy, Raman spectroscopy and argon (Ar) and carbon dioxide (CO2) sorption analyses are used to examine the textural properties of the Si-CDCs. The results show that the particle size of the precursor affects the surface area and porosity of carbons. Furthermore, an additional heat treatment of the Si-CDC with 50-nm particle size for 24 h at 1,000 °C results in a collapse of the pore structure and reduces the surface area. The capacitive behaviours are investigated in H2SO4 and in tetraethyl ammonium tetrafluoroborate (TEABF4)/acetonitrile (AN). The electrochemical performance of the Si-CDCs is influenced by the particle size, surface area, pore volume and pore size distribution. The Si-CDCs exhibit capacitances in 1 M H2SO4 of up to 179 F g−1 and very stable charge–discharge performance over 5,000 cycles. This study shows the crucial importance of ultramicropores less than 1 nm combined with nanosized particles for achieving high capacitance in aqueous electrolyte. Moreover, the graphitic degree at the surface of the Si-CDCs enhances considerably the rate capability and stability in both electrolytes.
Keyword Carbide-derived carbon
Double-layer capacitance
Electrochemical stability
Micropores
Supercapacitors
Porosity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 5 November 2013

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
 
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Created: Tue, 18 Mar 2014, 01:58:04 EST by Dr Thomas Rufford on behalf of School of Chemical Engineering