Energy storage on ultrahigh surface area activated carbon fibers derived from PMIA

Alberto Castro-Muñiz, Fabián Suárez-García, Amelia Martínez-Alonso, Juan M.D. Tascõn, Takashi Kyotani

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    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 m 2 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. Versatile microporous carbon fibers: High-performance activated carbon fibers with different textural and surface chemical properties are obtained from a polymeric fiber by simply choosing different preparation conditions. The fibers show very promising performances in energy storage applications such as H2 storage and supercapacitors.

    Original languageEnglish
    Pages (from-to)1406-1413
    Number of pages8
    JournalChemSusChem
    Volume6
    Issue number8
    DOIs
    Publication statusPublished - 2013 Aug 1

    Keywords

    • activation
    • adsorption
    • carbon
    • energy storage
    • microporous materials

    ASJC Scopus subject areas

    • Environmental Chemistry
    • Chemical Engineering(all)
    • Materials Science(all)
    • Energy(all)

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