New Limits for Stability of Supercapacitor Electrode Material Based on Graphene Derivative

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73601468" target="_blank" >RIV/61989592:15310/20:73601468 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2079-4991/10/9/1731/htm" target="_blank" >https://www.mdpi.com/2079-4991/10/9/1731/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/nano10091731" target="_blank" >10.3390/nano10091731</a>

Jazyk výsledku

angličtina

Název v původním jazyce

New Limits for Stability of Supercapacitor Electrode Material Based on Graphene Derivative

Popis výsledku v původním jazyce

Supercapacitors offer a promising alternative to batteries, especially due to their excellentpower density and fast charging rate capability. However, the cycling stability and materialsynthesis reproducibility need to be significantly improved to enhance the reliability and durabilityof supercapacitors in practical applications. Graphene acid (GA) is a conductive graphene derivativedispersible in water that can be prepared on a large scale from fluorographene. Here, we report asynthesis protocol with high reproducibility for preparing GA. The charging/discharging rate stabilityand cycling stability of GA were tested in a two-electrode cell with a sulfuric acid electrolyte. The ratestability test revealed that GA could be repeatedly measured at current densities ranging from 1 to20 A g−1without any capacitance loss. The cycling stability experiment showed that even after60,000 cycles, the material kept 95.3% of its specific capacitance at a high current density of3 A g−1.The findings suggested that covalent graphene derivatives are lightweight electrode materials suitable for developing supercapacitors with extremely high durability.

Název v anglickém jazyce

New Limits for Stability of Supercapacitor Electrode Material Based on Graphene Derivative

Popis výsledku anglicky

Supercapacitors offer a promising alternative to batteries, especially due to their excellentpower density and fast charging rate capability. However, the cycling stability and materialsynthesis reproducibility need to be significantly improved to enhance the reliability and durabilityof supercapacitors in practical applications. Graphene acid (GA) is a conductive graphene derivativedispersible in water that can be prepared on a large scale from fluorographene. Here, we report asynthesis protocol with high reproducibility for preparing GA. The charging/discharging rate stabilityand cycling stability of GA were tested in a two-electrode cell with a sulfuric acid electrolyte. The ratestability test revealed that GA could be repeatedly measured at current densities ranging from 1 to20 A g−1without any capacitance loss. The cycling stability experiment showed that even after60,000 cycles, the material kept 95.3% of its specific capacitance at a high current density of3 A g−1.The findings suggested that covalent graphene derivatives are lightweight electrode materials suitable for developing supercapacitors with extremely high durability.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

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)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Nanomaterials

ISSN

2079-4991

e-ISSN

—

Svazek periodika

10

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

"1731-1"-"1731-13"

Kód UT WoS článku

000581807600001

EID výsledku v databázi Scopus

2-s2.0-85090544778