@article{ART001661230},
author={Sukeun Park and PARK SOOJIN and Kim Seok},
title={Preparation and capacitance behaviors of cobalt oxide/ graphene composites},
journal={Carbon Letters},
issn={1976-4251},
year={2012},
volume={13},
number={2},
pages={130-132},
doi={}
TY - JOUR
AU - Sukeun Park
AU - PARK SOOJIN
AU - Kim Seok
TI - Preparation and capacitance behaviors of cobalt oxide/ graphene composites
JO - Carbon Letters
PY - 2012
VL - 13
IS - 2
PB - Korean Carbon Society
SP - 130
EP - 132
SN - 1976-4251
AB - In this study, cobalt oxide (Co_3O_4)/graphene composites were synthesized through a simple chemical method at various calcination temperatures. We controlled the crystallinity, particle size and morphology of cobalt oxide on graphene materials by changing the annealing temperatures (200, 300, 400℃). The nanostructured Co_3O_4/graphene hybrid materials were studied to measure the electrochemical performance through cyclic voltammetry. The Co3O4/graphene sample obtained at 200℃ showed the highest capacitance of 396 Fg^(-1) at 5 mVs^(-1). The morphological structures of composites were also examined by scanning electron microscopy and transmission electron microscopy (TEM). Annealing Co_3O_4/graphene samples in air at different temperatures significantly changed the morphology of the composites. The flower-like cobalt oxides with higher crystallinity and larger particle size were generated on graphene according to the increase of calcination temperature. A TEM analysis of the composites at 200℃ revealed that nanoscale Co_3O_4 (~7 nm) particles were deposited on the surface of the graphene. The improved electrochemical performance was attributed to a combination effect of graphene and pseudocapacitive effect of Co_3O_4.
KW - cobalt oxide graphene composites;calcination temperatures;electrochemical performance;pseudocapacitive effect
DO -
ER -
Sukeun Park, PARK SOOJIN and Kim Seok. (2012). Preparation and capacitance behaviors of cobalt oxide/ graphene composites. Carbon Letters, 13(2), 130-132.
Sukeun Park, PARK SOOJIN and Kim Seok. 2012, "Preparation and capacitance behaviors of cobalt oxide/ graphene composites", Carbon Letters, vol.13, no.2 pp.130-132. Available from: doi:
Sukeun Park, PARK SOOJIN, Kim Seok "Preparation and capacitance behaviors of cobalt oxide/ graphene composites" Carbon Letters 13.2 pp.130-132 (2012) : 130.
Sukeun Park, PARK SOOJIN, Kim Seok. Preparation and capacitance behaviors of cobalt oxide/ graphene composites. 2012; 13(2), 130-132. Available from: doi:
Sukeun Park, PARK SOOJIN and Kim Seok. "Preparation and capacitance behaviors of cobalt oxide/ graphene composites" Carbon Letters 13, no.2 (2012) : 130-132.doi:
Sukeun Park; PARK SOOJIN; Kim Seok. Preparation and capacitance behaviors of cobalt oxide/ graphene composites. Carbon Letters, 13(2), 130-132. doi:
Sukeun Park; PARK SOOJIN; Kim Seok. Preparation and capacitance behaviors of cobalt oxide/ graphene composites. Carbon Letters. 2012; 13(2) 130-132. doi:
Sukeun Park, PARK SOOJIN, Kim Seok. Preparation and capacitance behaviors of cobalt oxide/ graphene composites. 2012; 13(2), 130-132. Available from: doi:
Sukeun Park, PARK SOOJIN and Kim Seok. "Preparation and capacitance behaviors of cobalt oxide/ graphene composites" Carbon Letters 13, no.2 (2012) : 130-132.doi:
