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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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
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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