Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 176, Issue 15, Pages 1232-1238Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2011.07.003
Keywords
Carbon aerogel microbeads; Composite; Supercapacitor; Electrochemical performance
Funding
- National Natural Science Foundation of China [51072173]
- Specialized Research Fund for the Doctoral Program of Higher Education [20094301110005]
- Science and Technology Department of Hunan Province [2010JT4050]
- Hunan Provincial Education Department [10B054]
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A series of Mn2O3/carbon aerogel microbead (Mn2O3/CAMB) composites for supercapacitor electrodes have been synthesized by in situ encapsulation method. The structure and morphology of Mn2O3/CAMB are characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectrum and scanning electron microscopy (SEM). Electrochemical performances of the synthesized composites are evaluated by cyclic voltammetry and galvanostatic charge/discharge measurement. All the composites with different Mn2O3 contents show higher specific capacitance than pure CAMB due to the pseudo-capacitance of the Mn2O3 particles dispersed on the surface of CAMB. The highest specific capacitance is up to 368.01 Fg(-1) when 10 wt% Mn2O3 is coated on the surface of CAMB. Besides, 10%-Mn2O3/CAMB supercapacitor exhibits excellent cyclic stability, the specific capacitance still retains 90% of initial capacitance over 5000 cycles. (C) 2011 Elsevier B.V. All rights reserved.
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