Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 21, Issue 43, Pages 17185-17192Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm13055b
Keywords
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Funding
- National Natural Science Foundation of China [20663001, 51064004, 21063003, 20763002]
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A new class of micro/nano composite architecture, characterized by radially grown MnO2 nanoneedles on high specific surface area (SSA) mesoporous carbon microspheres (MCMs), is presented for the first time as electrode materials for electrochemical capacitors (ECs). This unique architecture could be considered as an omnibearing oriented 1-D nanostructure which possesses high power features for EC applications. When evaluated for electrochemical capacitance performance in a non-aqueous electrolyte, this composite architecture demonstrates improved electrochemical properties with maximum specific energy and energy density of 164 W h kg(-1) and 25 kW h L-1, respectively. This enhanced performance could be mainly attributed to the integration of efficient double layer capacitance and tremendous pseudo-capacitance from MCMs and MnO2. Our findings suggest that this composite architecture might be used as a promising anode material for high performance ECs.
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