Journal
ENERGY STORAGE MATERIALS
Volume 11, Issue -, Pages 176-183Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2017.07.011
Keywords
Manganese oxides; Supercapacitor; Mesoporous metal oxide; Template-free preparation method
Funding
- Shanghai Municipal Science and Technology Commission [14DZ2261200, 15DZ2260300]
- 111 project [D16002]
- Shanghai Municipal Education Commission under Project of Shanghai Teachers Incentive plan
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Mesoporous Mn3O4 with 3D network and high specific surface areas have been successfully synthesized at room temperature via a template-free way. Acting as a supercapacitor electrode in 1 M Na2SO4 electrolyte, the sponge-like mesoporous Mn3O4 exhibits high specific capacitances (230 similar to 280 F g(-1) at 0.5 A g(-1)) as well as greatly improved rate and cycling performance. Their capacitance retentions of ca 52.8% obtained when the current density increasing from 0.5 A g(-1) to 30 A g(-1), and a cycle stability reached 98.9% after 5000 cycles at a current density of 2 A g(-1). Furthermore, the high yield, facile and environmental friendly synthetic route allows the mesoporous Mn3O4 preparation to be readily scaled-up. The results indicate that the as-prepared mesoporous Mn3O4 with a 3D cross-link network structure has a great potential as the electrode material for supercapacitors with high electrochemical performance.
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