Abstract
At present, a lot of attention has been paid to the reasonable design and synthesis of materials with core shell structure for high-performance supercapacitors. Herein, the Co3O4@MnO2 core shell arrays on nickel foam are successfully synthesized via a facile and effective hydrothermal method followed with annealing process. The sample was characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Electrochemical performance of the Co3O4@MnO2 material was studied using cyclic voltammetry, charge/discharge cycling, and electrochemical impedance measurements in 6 mol L−1 KOH aqueous electrolyte. The results indicated that the Co3O4@MnO2 material presented excellent electrochemical performance in terms of specific capacitance, cyclic stability, and charge/discharge stability.
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This work was financially supported by the National Natural Science Foundation of China (No. 51674221).
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Mengya Feng and Guowei Zhang contributed equally.
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Feng, M., Zhang, G., Du, Q. et al. Co3O4@MnO2 core shell arrays on nickel foam with excellent electrochemical performance for aqueous asymmetric supercapacitor. Ionics 23, 1637–1643 (2017). https://doi.org/10.1007/s11581-017-2013-1
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DOI: https://doi.org/10.1007/s11581-017-2013-1