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High-performance supercapacitors of hydrous ruthenium oxide/mesoporous carbon composites

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Abstract

The amorphous hydrous ruthenium oxide/mesoporous carbon composites (denoted as RuO2·xH2O/MC), obtained by loading small amount of amorphous hydrous ruthenium oxide nanoparticles ranged from 0.9 to 5.4% by weight of Ru (denoted as RuO2·xH2O) on mesoporous carbon (MC), were investigated for the first time and were used for supercapacitors. Electrochemical measurements showed that RuO2·xH2O/MC composites not only have an enhanced specific capacitance but also retain the superior rate capability of MC. The RuO2·xH2O/MC composite with Ru loading of 3.6 wt% exhibited an increase of the specific capacitance of approximately 57% (from 115 to 181 F/g) at the scan rate of 25 mV s−1 in 0.1 M H2SO4 aqueous electrolyte. The specific capacitance based on the mass of RuO2 was estimated to be 1,527 F/g, by subtracting the contribution from MC in the composite. Cycle performance tests for RuO2·xH2O/MC composite (3.6 wt% Ru) showed that approximately 2.8% loss of the total capacitance was observed after 1,000 cycles.

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Acknowledgement

This work was supported by the National Science Foundation of China.

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Authors and Affiliations

  1. Department of Chemistry, and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, People’s Republic of China

    Yaomin Zhao, Ling Liu, Juan Xu, Jie Yang, Manming Yan & Zhiyu Jiang

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  1. Yaomin Zhao
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  2. Ling Liu
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  3. Juan Xu
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  4. Jie Yang
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  5. Manming Yan
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  6. Zhiyu Jiang
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Correspondence to Zhiyu Jiang.

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Zhao, Y., Liu, L., Xu, J. et al. High-performance supercapacitors of hydrous ruthenium oxide/mesoporous carbon composites. J Solid State Electrochem 11, 283–290 (2007). https://doi.org/10.1007/s10008-006-0105-3

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  • DOI: https://doi.org/10.1007/s10008-006-0105-3

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