Journal
NANOSCALE
Volume 8, Issue 22, Pages 11689-11697Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6nr02267g
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Funding
- National Key Basic Research Program of China (973 Program) [2014CB648300]
- Program for New Century Excellent Talents in University [NCET-13-0645, NCET-13-0872]
- Program for Jiangsu Specially-Appointed Professors [RK030STP15001]
- National Natural Science Foundation of China [21201010, 21422402, 20904024, 51173081, 61136003, 61106036]
- Innovation Scientists and Technicians Troop Construction Projects of Henan Province [164200510018]
- Plan For Scientific Innovation Talent of Henan Province
- Program for Innovative Research Team (in Science and Technology) in the University of Henan Province [14IRTSTHN004]
- Natural Science Foundation of Jiangsu Province [BK20140060, BK20130037, BM2012010]
- Specialized Research Fund for the Doctoral Program of Higher Education [20133223110008, 20113223110005]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Six Talent Plan [2012XCL035, 2015-XCL-030]
- Qing Lan Project of Jiangsu Province
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Dimanganese trioxide microflowers are easily obtained from a Mn(II) 8-hydroxyquinoline microcoordination after calcination in air. We also look into the possible formation mechanism of the flower-like morphology, and find that the reaction time affects the morphology of the coordination. Furthermore, the as-prepared porous Mn2O3 microflowers are made of many nanoplates which form many nanogaps and nanochannels. Interestingly, the assembled electrode based on the as-prepared porous Mn2O3 microflowers proves to be a high-performance electrode material for supercapacitors. The electrode shows a specific capacitance of 994 F g(-1), which can work well even after 4000 cycles at 0.75 A g(-1). More importantly, the porous Mn2O3 microflowers and activated carbons are assembled into a high-performance flexible solid-state asymmetric supercapacitor with a specific capacitance of 312.5 mF cm(-2). The cycle test shows that the device can offer 95.6% capacity of the initial capacitance at 2.0 mA cm(-2) after 5000 cycles with little decay. The maximum energy density of the device can achieve 6.56 mWh cm(-3) and the maximum power density can also achieve 283.5 mW cm(-3), which are among the best results for manganese based materials.
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