Effect of electrode surface treatment on carbon fiber based structural supercapacitors: Electrochemical analysis, mechanical performance and proof-of-concept
Fecha
2022
Título de la revista
ISSN de la revista
Título del volumen
Editor
Elsevier
Resumen
Supercapacitors based on carbon fiber reinforced polymer (CFRPs) were studied and the influence of surface
treatment on mechanical and electrochemical properties was explored. Electrodes were prepared by deposition
of graphene nanoplatelets (GNPs) combined with different binders (PVDF and PVA) onto the surface of a carbon
fiber fabric. A significant decrease in the Interlaminar Shear Strength (ILSS) is observed when comparing the
solid polymer electrolyte to the structural resin (around 50 %). Moreover, the addition of any binder promotes a
decrease in the ILSS due to lower interfacial properties (around 20 % when compared to the GNP-coated condition). Electrochemical impedance spectroscopy (EIS) analysis proves that the structural capacitor can be fitted
with an equivalent circuit consisting of R-CPE series elements. An increase of the bulk resistance was observed
when using a binder (29.7 and 22.7 kΩ) when compared to the GNP-only-coated (10.2 kΩ). For this reason, the
structural supercapacitor with the best properties was the GNP-only-coated one with a specific capacitance and
coulombic efficiency, calculated by Galvanostatic charge-discharge (GCD), of 5.2 mF/g, showing also high stability of electrochemical properties over time. Energy storage capability was successfully demonstrated by a
proof of concept consisting of powering a LED after a short charge time of the device.
Descripción
This work was supported by the Agencia Estatal de Investigación of Spanish Government [Project MULTIFUNC-EVs PID2019-107874RB-I00] and Comunidad de Madrid Government [Project ADITIMAT-CM (S2018/NMT-4411)].
Citación
Joaquín Artigas-Arnaudas, Xoan F. Sánchez-Romate, María Sánchez, Alejandro Ureña, Effect of electrode surface treatment on carbon fiber based structural supercapacitors: Electrochemical analysis, mechanical performance and proof-of-concept, Journal of Energy Storage, Volume 59, 2023, 106599, ISSN 2352-152X, https://doi.org/10.1016/j.est.2022.106599
Colecciones
Excepto si se señala otra cosa, la licencia del ítem se describe como Atribución 4.0 Internacional