Graphene quantum dots as the electrolyte for solid state supercapacitors

Scientific Reports
Su ZhangMinglu Huang

Abstract

We propose that graphene quantum dots (GQDs) with a sufficient number of acidic oxygen-bearing functional groups such as -COOH and -OH can serve as solution- and solid- type electrolytes for supercapacitors. Moreover, we found that the ionic conductivity and ion-donating ability of the GQDs could be markedly improved by simply neutralizing their acidic functional groups by using KOH. These neutralized GQDs as the solution- or solid-type electrolytes greatly enhanced the capacitive performance and rate capability of the supercapacitors. The reason for the enhancement can be ascribed to the fully ionization of the weak acidic oxygen-bearing functional groups after neutralization.

References

Aug 20, 2009·Chemical Society Reviews·Li Li Zhang, X S Zhao
Aug 2, 2011·Nature Nanotechnology·Wei GaoPulickel M Ajayan
Jan 6, 2012·Nano Letters·Juan PengPulickel M Ajayan
Jan 14, 2012·Journal of the American Chemical Society·Ayrat DimievJames M Tour
Dec 7, 2013·Nature Communications·Ruquan YeJames M Tour
Feb 6, 2014·Advanced Materials·François BéguinElzbieta Frackowiak
May 3, 2014·Chemical Society Reviews·Daniel R DreyerChristopher W Bielawski
Aug 8, 2014·Physical Chemistry Chemical Physics : PCCP·Qing ChenLiangti Qu

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Citations

Nov 9, 2017·Chemical Society Reviews·Yuanhong XuShaojun Guo
Jan 7, 2021·Nanomaterials·Fitri Aulia PermatasariFerry Iskandar
Aug 9, 2017·ACS Applied Materials & Interfaces·Iuliana MihalacheMihaela Kusko
Aug 25, 2021·Chemosphere·Shivam RawatThallada Bhaskar

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Methods Mentioned

BETA
nuclear magnetic resonance
transmission electron microscopy

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