open access

https://hdl.handle.net/2115/57394

All-solid-state electrochemical capacitors using MnO2/carbon nanotube composite electrode

英語

Phosphosilicate gel

2013-10-30

Pergamon-elsevier science ltd

Electrochimica acta

109

651-655

MnO2/carbon nanotube (CNT) composite was prepared by a solution process. In the obtained MnO2-CNT composite, MnO2 particles were well-dispersed on CNTs. The specific capacitance of the MnO2-CNT composite in an aqueous electrolyte was higher than that of MnO2 and CNT. All-solid-state electrochemical capacitors (ECs) were fabricated using the MnO2-CNT composite as a positive electrode, activated carbon powder as a negative electrode, and phosphosilicate gel as an electrolyte. The obtained all-solid-state ECs operated at the temperature range between -30 degrees C and 100 degrees C. The specific discharge capacitance and the rate ability of the capacitors were improved by elevating temperature. In addition, the fabricated all-solid-state ECs exhibited excellent cycle performance at the temperature range between -30 degrees C and 100 degrees C for 20,000 cycles. These results indicate that all-solid-state ECs using MnO2 are promising energy storage devices with excellent stability and high reliability at the wide range of temperatures. (C) 2013 Elsevier Ltd. All rights reserved.

学術雑誌論文

Submitted Manuscript Under Review

0013-4686