Hybrid Solid Polymer Electrolytes Based on Epoxy Resins, Ionic Liquid, and Ceramic Nanoparticles for Structural Applications

• Published in: Polymers Vol. 16; no. 14; p. 2048
• Main Authors: Muñoz, Bianca K, Lozano, Jorge, Sánchez, María, Ureña, Alejandro
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 18.07.2024
• Subjects: Alumina; Carbon fibers; composite polymer electrolyte; Conductivity; Electric vehicles; Electrolytes; Energy consumption; Energy storage; Epoxy resins; Ionic liquids; Lithium; Mechanical properties; Molten salt electrolytes; Nanoparticles; Polymer blends; Polymers; Reagents; Solid electrolytes; solid polymer electrolyte; Spectrum analysis; Storage modulus; structural devices; structural supercapacitor; Supercapacitors; Tensile strength; Voltammetry; United States > US; Switzerland; composite polymer electrolyte; structural devices; structural supercapacitor; energy storage; solid polymer electrolyte
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym16142048

Solid polymer electrolytes (SPE) and composite polymer electrolytes (CPE) serve as crucial components in all-solid-state energy storage devices. Structural batteries and supercapacitors present a promising alternative for electric vehicles, integrating structural functionality with energy storage capability. However, despite their potential, these applications are hampered by various challenges, particularly in the realm of developing new solid polymer electrolytes that require more investigation. In this study, novel solid polymer electrolytes and composite polymer electrolytes were synthesized using epoxy resin blends, ionic liquid, lithium salt, and alumina nanoparticles and subsequently characterized. Among the formulations tested, the optimal system, designated as L70P30ILE40Li1MAl2 and containing 40 wt.% of ionic liquid and 5.7 wt.% of lithium salt, exhibited exceptional mechanical properties. It displayed a remarkable storage modulus of 1.2 GPa and reached ionic conductivities of 0.085 mS/cm at 60 °C. Furthermore, a proof-of-concept supercapacitor was fabricated, demonstrating the practical application of the developed electrolyte system.