Fabrication and Electrochemical Properties of Electrospun Mn3O4 and RuO2-Mn3O4 Composite Nanofibers
- Fabrication and Electrochemical Properties of Electrospun Mn3O4 and RuO2-Mn3O4 Composite Nanofibers
- 윤두영; 현태선; 최덕균; 홍재민; 김일두
- Issue Date
- Electrospin2010, International Conference on Electrospinning
- We report on the facile synthesis of Mn3O4 and highly conductive RuO2-Mn3O4 composite nanofiber mats by electrospinning and their potential suitability for application in electrochemical capacitors. Electrospun Mn3O4 and RuO2-Mn3O4 composite nanofiber mats calcined at 300 C exhibited multiple fiber networks composed of nanoparticles in the range of 5-15 nm (average ≈10 nm). For the RuO2-Mn3O4 composite fiber mats, crystalline Mn3O4 phases were well mixed with the amorphous RuOx phases. The electrochemical capacitors utilizing RuO2 Mn3O4 composite nanofiber mats as active electrodes exhibited a high specific capacitance of 293 F/g at 10 mV/s, high rate capability with a capacity loss of only 45% from 10 to 2000 mV/sec, and superior cycle characteristics over 30,000 cycles as compared to those (216 F/g at 10 mV/s, capacity loss of 94 %, poor cycle performance of 2000 cycles) of Mn3O4 nanofiber mats.
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