Tuning the interfacial chemistry in metal organic framework/graphene electrodes for boosting energy storage
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F25%3A73630832" target="_blank" >RIV/61989592:15640/25:73630832 - isvavai.cz</a>
Alternative codes found
RIV/61989100:27640/25:10258856
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2025/ta/d5ta01697e" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2025/ta/d5ta01697e</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d5ta01697e" target="_blank" >10.1039/d5ta01697e</a>
Alternative languages
Result language
angličtina
Original language name
Tuning the interfacial chemistry in metal organic framework/graphene electrodes for boosting energy storage
Original language description
Two-dimensional conductive metal-organic frameworks (2D-CMOFs) are emerging materials for electrochemical energy storage. However, their performance is often hindered by insulating interfaces between the CMOF particles. To address this limitation, we introduced and experimentally demonstrated the development of interfacial bridges through the coordination of the metal nodes of a nickel 2D-CMOF (2DNi) and the carboxyl groups from a densely and selectively functionalized graphene (graphene acid, GA). To achieve this, the 2DNi MOF was grown in the presence of GA at low temperatures and ambient pressure in water. The obtained 2DNiGA electrode material shows over a 100% capacitance improvement compared to electrodes synthesized under identical conditions using either unfunctionalized pristine graphene or post-synthetically added GA via physical mixing. In the latter case no formation of coordination bonds with the nickel nodes of the MOF is observed, confirming our initial hypothesis on the importance of the seamless interfacial bridging. Moreover, a hybrid, flexible supercapacitor using 2DNiGA as a positive and GA as a negative electrode delivers a superior gravimetric energy density of 71 W h kg-1 at 0.8 kW kg-1. Notably, it delivers a similarly high volumetric energy density of 73.8 W h L-1 at 0.836 kW L-1. The data indicate that the asymmetric supercapacitor compares favorably with top-tier supercapacitor electrodes, and uniquely combines superior gravimetric and volumetric energy densities. The supercapacitor is also robust, retaining more than 94% of its initial performance after 10 000 charge/discharge cycles, or when bent at 180 degrees. The introduced concept of such tailored interfacial bridging offers broad potential for improving the properties of MOF materials in electrochemical energy storage.
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
21001 - Nano-materials (production and properties)
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
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Materials Chemistry A
ISSN
2050-7488
e-ISSN
2050-7496
Volume of the periodical
13
Issue of the periodical within the volume
22
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
nestránkováno
UT code for WoS article
001482647400001
EID of the result in the Scopus database
2-s2.0-105004645678