Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation and Electrochemical Properties of Carbon Cryogel for Supercapacitor

  • Song, Min-Seob (Thin Film Materials Research Center, Korea Institute of Science and Technology) ;
  • Nahm, Sahn (Department of Materials Science and Engineering, Korea University) ;
  • Oh, Young-Jei (Thin Film Materials Research Center, Korea Institute of Science and Technology)
  • Published : 2008.11.30
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Abstract

Electrochemical properties of carbon cryogel electrode for the application of composite electrode materials mixed with metal oxide in supercapacitor have been studied. Carbon cryogels were synthesized by sol-gel polycondensation of resorcinol with form aldehyde, followed by a freeze drying, and then pyrolysis in an inert atmosphere. Physical properties of carbon cryogel were characterized by BET, X-ray diffraction (XRD) and scanning electron microscopy (SEM). It is found that carbon cryogel is amorphous material. The electrochemical properties of carbon cryogel were measured by cyclic voltammetry as a function of concentration of liquid electrolyte, galvanostatic charge-discharge with different scan rates and electrochemical impedance measurements. The result of cyclic voltammetry indicated that the specific capacitance value of a carbon cryogel electrode was approximately 150.2 F/g (at 5 mV/s in 6M KOH electrolyte).

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  2. Drying stresses in precursor gel: effect on pore connectivity in carbonized form, and resulting performance in a supercapacitor electrode pp.1573-4846, 2018, https://doi.org/10.1007/s10971-018-4814-8