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논문 기본 정보

자료유형
학술저널
저자정보
C. Sambathkumar (Kalasalingam Academy of Research and Education) K. R. Nagavenkatesh (Kalasalingam Academy of Research and Education) R. Thangavel (Indian Institute of Technology) N. Nallamuthu (Dayananda Sagar Academy of Technology and Management) P. Devendran (Kalasalingam Academy of Research and Education) K. Rajesh (Academy of Maritime Education and Training (AMET))
저널정보
대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.20 No.5
발행연도
2024.9
수록면
571 - 583 (13page)
DOI
https://doi.org/10.1007/s13391-024-00500-4

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Increasing energy requirement and over energy consumption and further upgrading of energy transfer and storage mechanismsare the critical problem. The supercapacitor is a good candidate for applications requiring high power deliveryor uptake. Metal oxides can be eff ective electrode materials for energy storage devices due to their multiple oxidationstates, high theoretical specifi c capacitance, wide potential window and eco-friendliness. In this connection, here reportthat electrodes made of notable nanosized transition metal oxides such as Ruthenium oxide (RuO 2 ), Nickel oxide (NiO)and Cobalt oxide (Co 3 O 4 ) were prepared by simple hydrothermal route and the prepared samples were confi rmed throughstructural, vibrational, morphological, and elemental composition analysis. The modifi ed working electrodes were thenexamined for electrochemical behavior, including CV, GCD, and EIS studies, using a 1 M KOH electrolyte solution aftersuccessive coating of the working material on empty Ni foil. Among them, RuO 2 has high integral area, a low sweeprate and remarkable specifi c capacitance value of 447.1 Fg -1 at 5 mVs -1 in CV analysis. In addition, the GCD curve hasgood charge-discharge cyclic stability with a maximum specifi c capacitance of 412.1 Fg -1 at 0.5 Ag -1 compared to NiOand Co 3 O 4 . RuO 2 has long charge-discharge stability and only 6.8% loss in capacitive retention compared to the othersystems, NiO (11.2%) and Co 3 O 4 (9.3%), even after 10,000 cycles. We except that use of nanosized metal oxide electrodesto enhance electrochemical activity will lead to further improvement in the supercapacitors.

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