Journal
RSC ADVANCES
Volume 6, Issue 7, Pages 5184-5191Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra22193e
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Funding
- National Program on Key Basic Research Project of China (973 Program) [2013CB127800]
- Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies [cstc2011pt-sy90001]
- Southwest University [SWU111071]
- Chongqing Science and Technology Commission [cstc2012gjhz90002]
- Specialized Research Fund for the Doctoral Program of Higher Education (RFDP) [20130182120025]
- Young Core Teacher Program of the Municipal Higher Educational Institution of Chongqing
- Fundamental Research Funds for the Central Universities [XDJK2015B016]
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Developmen(t) 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 similar to 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.
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