Synthesis of Picolylamine-Functionalized Graphene via Fluorographene Chemistry for High-Performance Symmetric Supercapacitors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F25%3A73631916" target="_blank" >RIV/61989592:15310/25:73631916 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15640/25:73631916 RIV/61989100:27640/25:10258845

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acsanm.5c02131" target="_blank" >https://pubs.acs.org/doi/10.1021/acsanm.5c02131</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsanm.5c02131" target="_blank" >10.1021/acsanm.5c02131</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Synthesis of Picolylamine-Functionalized Graphene via Fluorographene Chemistry for High-Performance Symmetric Supercapacitors

Popis výsledku v původním jazyce

Graphene-based materials have emerged as promising candidates for supercapacitor electrodes. However, their low energy density and the poor conductivity of commonly used graphene oxide remain critical challenges. In this study, we leveraged fluorographene chemistry to synthesize a graphene derivative functionalized with out-of-plane pyridine rings, covalently attached on graphene&apos;s network (G-Npyr). The resulting material exhibited a specific surface area of 230 m2 g-1 while the removal of fluorine atoms from fluorographene&apos;s lattice substantially restored graphene&apos;s conductivity. As a result, G-Npyr-based electrodes delivered an energy density of 61 Wh kg-1 at a power density of 907 W kg-1 and a volumetric energy density of 112 Wh L-1. Furthermore, the electrodes demonstrated excellent cycling stability, retaining 90% capacity after 10,000 cycles in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4). In contrast to aqueous-based electrolytes, the latter allows the cell to operate in wider voltage window of 3.5 V. In addition to the above, the synthesis is scalable, opening the capability for real-life applications. All in all, these findings highlight the potential use of G-Npyr as a high-performance, scalable electrode material for next-generation supercapacitors.

Název v anglickém jazyce

Synthesis of Picolylamine-Functionalized Graphene via Fluorographene Chemistry for High-Performance Symmetric Supercapacitors

Popis výsledku anglicky

Graphene-based materials have emerged as promising candidates for supercapacitor electrodes. However, their low energy density and the poor conductivity of commonly used graphene oxide remain critical challenges. In this study, we leveraged fluorographene chemistry to synthesize a graphene derivative functionalized with out-of-plane pyridine rings, covalently attached on graphene&apos;s network (G-Npyr). The resulting material exhibited a specific surface area of 230 m2 g-1 while the removal of fluorine atoms from fluorographene&apos;s lattice substantially restored graphene&apos;s conductivity. As a result, G-Npyr-based electrodes delivered an energy density of 61 Wh kg-1 at a power density of 907 W kg-1 and a volumetric energy density of 112 Wh L-1. Furthermore, the electrodes demonstrated excellent cycling stability, retaining 90% capacity after 10,000 cycles in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4). In contrast to aqueous-based electrolytes, the latter allows the cell to operate in wider voltage window of 3.5 V. In addition to the above, the synthesis is scalable, opening the capability for real-life applications. All in all, these findings highlight the potential use of G-Npyr as a high-performance, scalable electrode material for next-generation supercapacitors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

<a href="/cs/project/EH22_008%2F0004587" target="_blank" >EH22_008/0004587: Technologie za hranicí nanosvěta</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

ACS Applied Nano Materials

ISSN

2574-0970

e-ISSN

—

Svazek periodika

8

Číslo periodika v rámci svazku

31

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

"15485–15494"

Kód UT WoS článku

001538002200001

EID výsledku v databázi Scopus

2-s2.0-105013208037