Tuning the interfacial chemistry in metal organic framework/graphene electrodes for boosting energy storage

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/61989100:27640/25:10258856

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Tuning the interfacial chemistry in metal organic framework/graphene electrodes for boosting energy storage

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Tuning the interfacial chemistry in metal organic framework/graphene electrodes for boosting energy storage

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Chemistry A

ISSN

2050-7488

e-ISSN

2050-7496

Svazek periodika

13

Číslo periodika v rámci svazku

22

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

nestránkováno

Kód UT WoS článku

001482647400001

EID výsledku v databázi Scopus

2-s2.0-105004645678