Synthesis, Characterization, and Electrochemical Properties of Mn3O4/Cr2O3 Composite

Fen Ran; Ling Ren Wang; Lei Zhao; Yong Tao Tan; Ling Bin Kong; Long Kang

doi:10.4028/www.scientific.net/AMR.463-464.555

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 463-464Synthesis, Characterization, and Electrochemical...

Synthesis, Characterization, and Electrochemical Properties of Mn₃O₄/Cr₂O₃ Composite

Abstract:

Mn₃O₄/Cr₂O₃ composite materials were prepared by a chemical coprecipitation method. The structures were characterized by using SEM and XRD, and the supercapacitive behaviors of these composite materials were investigated with cyclic voltammetry (CV) and charge–discharge tests. Morphology of Mn₃O₄/Cr₂O₃ composite materials showed that the Mn₃O₄/Cr₂O₃ composite materials containning a small amount of Cr₂O₃ has a better dispersion compared with that containning a lage amount of it. Owing to the higher surface area and poor crystallization, the Mn₃O₄/Cr₂O₃ composite materials containning a small amount of Cr₂O₃ show much higher specific capacitance (The highest specific capacitance value of 494 F/g was obtained), and were more promising for applications in supercapacitors.

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Periodical:

Advanced Materials Research (Volumes 463-464)

Pages:

555-559

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.463-464.555

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Online since:

February 2012

Authors:

Fen Ran, Ling Ren Wang, Lei Zhao, Yong Tao Tan, Ling Bin Kong, Long Kang

Keywords:

Electrochemical Capacitors, In Situ Doping Method, Mn₃O₄/Cr₂O₃, Specific Capacitance

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