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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.22 No.3 pp.118-122
DOI : https://doi.org/10.3740/MRSK.2012.22.3.118

Synthesis and Electrochemical Characterization of Porous Co3O4/RuO2 Composite

Lim, Hye-Min, Ryu, Kwang-Sun

Abstract

We synthesized porous Co3O4/RuO2 composite using the soft template method. Cetyl trimethyl ammonium bromide (CTAB) was used to make micell as a cation surfactant. The precipitation of cobalt ion and ruthenium ion for making porosity in particles was induced by OH- ion. The porous Co3O4/RuO2 composite was completely synthesiszed after anealing until 250˚C at 3˚C/min. From the XRD ananysis, we were able to determine that the porous Co3O4/RuO2 composite was comprised of nanoparticles with low crystallinity. The shape or structure of the porous Co3O4/RuO2 composite was studied by FE-SEM and FE-TEM. The size of the porous Co3O4/RuO2 composite was 20~40 nm. From the FE-TEM, we were able to determine that porous cavities were formed in the composite particles. The electrochemical performance of the porous Co3O4/RuO2 composite was measured by CV and charge-discharge methods. The specific capacitances, determined through cyclic voltammetry (CV) measurement, were ~51, ~47, ~42, and ~33 F/g at 5, 10, 20, and 50 mV/sec scan rates, respectively. The specific capacitance through charge-discharge measurement was ~63 F/g in the range of 0.0~1.0 V cutoff voltage and 50 mAh/g current density.

다공성 Co3O4/RuO2 복합체 합성 및 전기화학적 특성

임혜민, 류광선

초록