Influence of the activation parameters on the electrochemical performance of chemically activated graphene materials

Y. Quintero, S. Herrera, Z. Zapata-Benabithe, D. Arango, R. Santamaría, Z. González, L. Cruz

    Resultado de la investigación: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

    Resumen

    In this work, activated graphene-like materials were obtained by varying both, the ratio of activated agent/graphene precursor and the activation temperature. The resulting materials were then characterized, resulting in higher values of specific surface area (SSA) when increasing the impregnation ratio at each temperature, reaching values up to 1325 m2 g−1. Gravimetric capacitances ranging between 11.0 and 49.0 F g−1 when charging/discharging at 0.5 A g-1 were obtained. The highest capacitance value was achieved not for samples with the highest SSA but with a micropore volume up to ~ 63 % of total pore volume. Overall, the capacitance values decreased significantly at activation temperatures of 600 and 700 °C at 2:1 and 4:1 impregnation ratios, regardless of an enhanced SSA, which could be explained considering the release of surface oxygenated functional groups during the thermal treatment. These results present the activated graphene materials as promising electrodes in energy storage devices.

    Idioma originalInglés
    Título de la publicación alojadaIV Congreso Colombiano de Electroquimica, IVCCEQ 2020
    EditoresJ. Morales, J. Orozco, J. Calderon, R. A. Torres
    EditorialIOP Publishing Ltd
    Páginas13-26
    Número de páginas14
    Edición1
    ISBN (versión digital)9781607689102
    DOI
    EstadoPublicada - 2021
    Evento4th Congreso Colombiano de Electroquimica, IVCCEQ 2020 - 4th Colombian Congress of Electrochemistry, IVCCEQ 2020 - Virtual, Online, Colombia
    Duración: 5 oct. 20207 oct. 2020

    Serie de la publicación

    NombreECS Transactions
    Número1
    Volumen100
    ISSN (versión impresa)1938-6737
    ISSN (versión digital)1938-5862

    Conferencia

    Conferencia4th Congreso Colombiano de Electroquimica, IVCCEQ 2020 - 4th Colombian Congress of Electrochemistry, IVCCEQ 2020
    País/TerritorioColombia
    CiudadVirtual, Online
    Período5/10/207/10/20

    Nota bibliográfica

    Publisher Copyright:
    © The Electrochemical Society.

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