Preparation of carbon aerogel electrodes for supercapacitor and their electrochemical characteristics View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2005-02

AUTHORS

S. J. Kim, S. W. Hwang, S. H. Hyun

ABSTRACT

A new process is presented for synthesizing the supercapacitor electrodes of carbon aerogel via pyrolyzing resorcinol-formaldehyde (RF) aerogel, which could be cost-effectively obtained by ambient drying of wet RF-gels instead of conventional supercritical drying. Defect free RF-aerogels instead of conventional supercritical drying. Defect free RF-aerogels with the linear shrinkage of less than 8% could be manufactured by ambient-drying of wet RF-gels. Carbon aerogels with high strength were prepared via pyrolyzing RF-aerogels in N2 atmosphere. The specific surface area (< 600 m2/g) and the electrical conductivity (∼ 50 S/cm) of carbon aerogels varied in sensitivity with the pyrolysis condition, while their densities (0.6 g/cm3) and porosities (70%) were found to be almost constant. Post heat-treatment of carbon aerogels around 300^∘C in air atmosphere was very effective for improving the electrochemical properties of electrodes. The carbon aerogel electrode pyrolyzed at 800∘C showed the specific capacitances of about 40 F/g in H2SO4 electrolyte solution and 35 F/g in KOH solution. More... »

PAGES

725-731

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10853-005-6313-x

DOI

http://dx.doi.org/10.1007/s10853-005-6313-x

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1021665197


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