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Reduced graphene oxide-CoFe2O4 composites for supercapacitor electrode

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Abstract

Reduced graphene oxide-CoFe2O4 (RGO-CoFe2O4) composite for supercapacitor electrodes has been investigated. On the basis of the morphological and structural characterization of the sample by scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectrometer, the electrochemical performances of the sample were investigated by cyclic voltammetry and chronopotentiometry in 0.50 mol L−1 Na2SO4 aqueous electrolyte. It was shown that the specific capacitance (123.2 F g−1) of RGO-CoFe2O4 composite was highly improved compared with that of RGO (89.9 F g−1), GO-CoFe2O4 (21.1 F g−1) and CoFe2O4 (18.7 F g−1) at the current density of 5 mA cm−2. The capacitance retention of about 78.1% for RGO-CoFe2O4 after 1000 cycles indicated that it has high cycle stability.

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Correspondence to Ping He.

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Published in Russian in Elektrokhimiya, 2013, Vol. 49, No. 4, pp. 405–410.

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He, P., Yang, K., Wang, W. et al. Reduced graphene oxide-CoFe2O4 composites for supercapacitor electrode. Russ J Electrochem 49, 359–364 (2013). https://doi.org/10.1134/S1023193513040101

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