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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
New Limits for Stability of Supercapacitor Electrode Material Based on Graphene Derivative
Original language description
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.
Czech name
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Czech description
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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
10403 - Physical chemistry

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)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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