Preparation and Electrochemical Performance of Mn₃O₄/GR Composites Electrode Material in Supercapacitors

Abstract:

Using hydrated manganese sulfate and general type graphene (GR) as raw materials, Mn₃O₄/GR composite has been successfully prepared by the liquid phase chemical co-precipitation method at room temperature. X-ray diffraction (XRD) was used to investigate the phase structure of Mn₃O₄ powder and Mn₃O₄/GR composite; The electrochemical performances of the samples were elucidated by cyclic voltammetry and galvanostatic charge-discharge test in 0.5 mol/L Na₂SO₄ electrolyte. The results show that the Mn₃O₄/GR composite possesses graphene phase and good reversibility; the composite also displays a specific capacitance of 318.8 F/g at a current density of 1 A/g.

• Periodical: Key Engineering Materials (Volume 807)
• Pages: 50-56
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.807.50
• Online since: June 2019
• Authors: Yun Long Zhou*, Zhi Biao Hu, Li Mei Wu, Jiao Hao Wu
• Keywords: Electrochemical Performance, Graphene, Mn₃O₄, Supercapacitor

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