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Issue 7, 2016
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Ultrathin MnO2 nanosheets grown on fungal conidium-derived hollow carbon spheres as supercapacitor electrodes

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Abstract

Development of biomass-derived carbon/MnO2 composites for energy applications has recently been attracting tremendous attention. However, the combination of MnO2 nanosheets and conidia-derived hollow carbon spheres for supercapacitor applications has never been realized. In this work, we develop a facile method to grow MnO2 nanosheets on hollow carbon spheres derived from Aspergillus flavus conidia. Ultrathin MnO2 nanosheets are uniformly grown on the surface of conidium-derived hollow carbon spheres. Sulfur element from the conidia is doped in the composites and the amount of MnO2 in the material is ∼50.2 wt%. The as-prepared MnO2–carbon sphere composited electrode possesses a high specific capacitance of 263.5 F g−1 at 1 A g−1. After 2000 cycles, the specific capacitance value remains 83% of retention and the coulombic efficiency remains as high as 94%, demonstrating the excellent cycling stability.

Graphical abstract: Ultrathin MnO2 nanosheets grown on fungal conidium-derived hollow carbon spheres as supercapacitor electrodes

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Publication details

The article was received on 23 Oct 2015, accepted on 31 Dec 2015 and first published on 06 Jan 2016


Article type: Paper
DOI: 10.1039/C5RA22193E
RSC Adv., 2016,6, 5184-5191

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    Ultrathin MnO2 nanosheets grown on fungal conidium-derived hollow carbon spheres as supercapacitor electrodes

    C. Mao, S. Liu, L. Pang, Q. Sun, Y. Liu, M. Xu and Z. Lu, RSC Adv., 2016, 6, 5184
    DOI: 10.1039/C5RA22193E

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