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Energy Storage on Ultrahigh Surface Area Activated Carbon Fibers Derived from PMIA

Authors

  • Dr. Alberto Castro-Muñiz,

    Corresponding author
    1. Chemistry of Materials, Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080, Oviedo (Spain)
    2. Division of Advanced System, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, 980-8577, Sendai (Japan)
    • Chemistry of Materials, Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080, Oviedo (Spain)

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  • Dr. Fabián Suárez-García,

    1. Chemistry of Materials, Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080, Oviedo (Spain)
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  • Prof. Dr. Amelia Martínez-Alonso,

    1. Chemistry of Materials, Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080, Oviedo (Spain)
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  • Prof. Dr. Juan M. D. Tascón,

    1. Chemistry of Materials, Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, 33080, Oviedo (Spain)
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  • Prof. Dr. Takashi Kyotani

    1. Division of Advanced System, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, 980-8577, Sendai (Japan)
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Abstract

High-performance carbon materials for energy storage applications have been obtained by using poly(m-phenylene isophthalamide), PMIA, as a precursor through the chemical activation of the carbonized aramid fiber by using KOH. The yield of the process of activation was remarkably high (25–40 wt %), resulting in activated carbon fibers (ACFs) with ultrahigh surface areas, over 3000 m2 g−1, and pore volumes exceeding 1.50 cm3 g−1, keeping intact the fibrous morphology. The porous structure and the surface chemical properties could easily be controlled through the conditions of activation. The PMIA-derived ACFs were tested in two types of energy storage applications. At −196 °C and 1 bar, H2 uptake values of approximately 3 wt % were obtained, which, in combination with the textural properties, rendered it a good candidate for H2 adsorption at high pressure and temperature. The performance of the ACFs as electrodes for electrochemical supercapacitors was also investigated. Specific capacitance values between 297 and 531 F g−1 at 50 mA g−1 were obtained in aqueous electrolyte (1 M H2SO4), showing different behaviors depending on the surface chemical properties.

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