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Covalent Graphene‐MOF Hybrids for High‐Performance Asymmetric Supercapacitors

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73602465" target="_blank" >RIV/61989592:15310/20:73602465 - isvavai.cz</a>

  • Alternative codes found

    RIV/61989100:27640/21:10248941

  • Result on the web

    <a href="https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/adma.202004560" target="_blank" >https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/adma.202004560</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1002/adma.202004560" target="_blank" >10.1002/adma.202004560</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Covalent Graphene‐MOF Hybrids for High‐Performance Asymmetric Supercapacitors

  • Original language description

    In this work, the covalent attachment of an amine functionalized metal‐organic framework (UiO‐66‐NH2 = Zr6O4(OH)4(bdc‐NH2)6; bdc‐NH2 = 2‐amino‐1,4‐benzenedicarboxylate) (UiO‐Universitetet i Oslo) to the basal‐plane of carboxylate functionalized graphene (graphene acid = GA) via amide bonds is reported. The resultant GA@UiO‐66‐NH2 hybrid displayed a large specific surface area, hierarchical pores and an interconnected conductive network. The electrochemical characterizations demonstrated that the hybrid GA@UiO‐66‐NH2 acts as an effective charge storing material with a capacitance of up to 651 F g−1, significantly higher than traditional graphene‐based materials. The results suggest that the amide linkage plays a key role in the formation of a π‐conjugated structure, which facilitates charge transfer and consequently offers good capacitance and cycling stability. Furthermore, to realize the practical feasibility, an asymmetric supercapacitor using a GA@UiO‐66‐NH2 positive electrode with Ti3C2TX MXene as the opposing electrode has been constructed. The cell is able to deliver a power density of up to 16 kW kg−1 and an energy density of up to 73 Wh kg−1, which are comparable to several commercial devices such as Pb‐acid and Ni/MH batteries. Under an intermediate level of loading, the device retained 88% of its initial capacitance after 10 000 cycles.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    ADVANCED MATERIALS

  • ISSN

    0935-9648

  • e-ISSN

  • Volume of the periodical

    33

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    DE - GERMANY

  • Number of pages

    10

  • Pages from-to

    "2004560-1"-"2004560-10"

  • UT code for WoS article

    000596065400001

  • EID of the result in the Scopus database

    2-s2.0-85097208378