Fecha de publicación: 08/11/2024 Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE Preparation and characterization of resin solid electrolyte and structural capatior.


Abstract
Multifunctional carbon fiber composite materials capable of storing energy and carrying structural loads have advantages for aerospace structures. In this paper, a structural supercapacitor that consists of an epoxy-based solid polymer electrolytes (E-SPEs) and carbon fiber was proposed. To develop an E-SPEs with better mechanical properties and ionic conductivity, Nano-SiO2 was introduced into the solid polymer electrolytes. Nano-SiO2 reinforced E-SPEs (Nano-SiO2/E-SPEs) show improved mechanical properties (Young's modulus [E] = 0.85 GPa) and ionic conductivity (4.99 × 10−4 S cm−1), compared to E-SPEs without Nano-SiO2. Structural supercapacitors were further prepared by combining E-SPEs with carbon fibers. The structural supercapacitor prepared with Nano-SiO2/E-SPEs exhibits the higher power and energy density (261.93 W kg−1 and 2.11 Wh kg−1) compared to the structural supercapacitor prepared with E-SPEs without Nano-SiO2 (51 W kg−1 and 0.34 Wh kg−1), indicating improved mechanical and energy storage properties for structural supercapacitors after incorporation of Nano-SiO2. This strategy has great potential in enhancing performance of structural energy storage composite materials for application in next-generation aerospace vehicles.