Towards a Further Generation of High-Energy Carbon-Based Capacitors by Using Redox-Active Electrolytes

Authors

  • Silvia Roldán,

    1. Chemistry of Materials Department, Instituto Nacional del Carbón, CSIC, Apdo. 73, 33080-Oviedo (Spain), Fax: (+34) 985-297-662
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  • Dr. Clara Blanco,

    1. Chemistry of Materials Department, Instituto Nacional del Carbón, CSIC, Apdo. 73, 33080-Oviedo (Spain), Fax: (+34) 985-297-662
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  • Dr. Marcos Granda,

    1. Chemistry of Materials Department, Instituto Nacional del Carbón, CSIC, Apdo. 73, 33080-Oviedo (Spain), Fax: (+34) 985-297-662
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  • Prof. Rosa Menéndez,

    1. Chemistry of Materials Department, Instituto Nacional del Carbón, CSIC, Apdo. 73, 33080-Oviedo (Spain), Fax: (+34) 985-297-662
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  • Dr. Ricardo Santamaría

    Corresponding author
    1. Chemistry of Materials Department, Instituto Nacional del Carbón, CSIC, Apdo. 73, 33080-Oviedo (Spain), Fax: (+34) 985-297-662
    • Chemistry of Materials Department, Instituto Nacional del Carbón, CSIC, Apdo. 73, 33080-Oviedo (Spain), Fax: (+34) 985-297-662
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  • This work was supported by MICINN (Project MAT2007-61467). S.R. thanks MICINN for an FPI doctoral grant.

Abstract

original image

An active contribution: The specific capacitance of carbon-based supercapacitors can be significantly improved by the addition of an electrochemically active compound (hydroquinone) to the supporting electrolyte. The strong contribution of the redox-active electrolyte to the pseudocapacitance of the system results in the largest capacitance values obtained for an activated carbon-based supercapacitor.

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