Electrochemical Properties of Using MnO2-HCS Composite for Supercapacitor 


Vol. 24,  No. 3, pp. 183-189, Sep.  2018
10.7464/ksct.2018.24.3.183


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  Abstract

Hollow carbon spheres (HCS) and carbon spheres (CS) were prepared by a hydrothermal reaction and they were introduced as a substrate for the deposition of MnO2 nanoparticles. The MnO2 nanoparticles were deposited on the carbon surface by a chemical redox deposition method. After deposition, the MnO2 nanoparticles were uniformally distributed on the carbon surface in a slit-shape, and sparse MnO2 slits appeared on the HCS surface. The MnO2-HCS showed an initial specific capacitance of 164.1 F g-1 at scan rate of 20 mv s-1, and after 1,000 cycles, the specific capacitance was maintained to 141.3 F g-1. The capacity retention of MnO2-HCS and MnO2-CS were calculated to 86% and 78% in the cycle performance test up to 1,000 cycles, respectively. MnO2-HCS showed a good cycle stability due to the mesoporous hollow structure which can cause a faster diffusion of the electrolyte and can easily adsorb and desorb Na+ ions on the surface of the electrode.

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  Cite this article

[IEEE Style]

J. EM and J. SM, "Electrochemical Properties of Using MnO2-HCS Composite for Supercapacitor," Clean Technology, vol. 24, no. 3, pp. 183-189, 2018. DOI: 10.7464/ksct.2018.24.3.183.

[ACM Style]

Jin EM and Jeong SM. 2018. Electrochemical Properties of Using MnO2-HCS Composite for Supercapacitor. Clean Technology, 24, 3, (2018), 183-189. DOI: 10.7464/ksct.2018.24.3.183.

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pISSN : 1598 - 9712
eISSN : 2288 - 0690

한국연구재단 등재학술지