|Table of Contents|

Electrochemical Properties of MCM-41 Supported Co3O4 Composites as Supercapacitor Electrode Materials

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2012年02期
Page:
353-358
Research Field:
Publishing date:

Info

Title:
Electrochemical Properties of MCM-41 Supported Co3O4 Composites as Supercapacitor Electrode Materials
Author(s):
WANG Lu12LIU Xiao-heng1WANG Xin1
1.School of Chemical Engineering,NUST,Nanjing 210094,China; 2.College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241000,China
Keywords:
mesoporous materials cobaltic-cobattous oxide electrode materials supercapacitors
PACS:
TM53
DOI:
-
Abstract:
By impregnating the cobalt nitrate Co(NO3)2·6H2O into the pore channels of mesoporous silica MCM-41 and then calcining the obtained precursors,the Co3O4/MCM-41-x(x is the mass ratio of cobaltic-cobattous oxide Co3O4 to MCM-41)series composites are made.The X-ray diffraction,the transmission electron microscopy,the N2 adsorption-desorption and the cyclic voltammetry and AC impedance spectroscopy are used to survey the chemical compositions,the structural characteristics and the electrochemical properties of titled materials.The results disclose that the specific surface areas and the pore volumes of materials are 280~440 m2/g and 0.22~0.34 cm3/g respectively.The loading of Co3O4,the sweep rate and the electrolyte concentration have significant influences on the electrochemical performances of the composites materials.When x is 1.6,the sweep rate is 3 mV/s,the specific capacitance of the material is 308 F/g and the electrode solution is 6 mol/L KOH,the retention rate of the specific capacitance is 91.3% after 500 continuous cycles.

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Last Update: 2012-10-12