聚合物电解质
电解质
聚合物
离子键合
离子液体
快离子导体
材料科学
离子电导率
化学工程
无机化学
化学
离子
物理化学
有机化学
复合材料
电极
工程类
催化作用
作者
Tiffany Harte,Bhagya Dharmasiri,Piers Coia,Daniel J. Eyckens,Luke C. Henderson
标识
DOI:10.1016/j.molliq.2024.124689
摘要
This study examines the dynamics of bicontinuous solid polymer electrolytes (SPEs) composed of solvate ionic liquids (SIL; lithium solvated in tri- or tetra-glyme with the TFSI/TFSA/NTf2 anion) and epoxy resin, for applications in carbon fiber (CF) structural supercapacitors. The influence of LiTFSI concentration on properties such as ionic conductivity and mechanical strength is investigated. SPEs containing SILs derived from G4 (tetraglyme) exhibited up to 2 times higher ionic conductivity than those containing G3 (triglyme), a trade-off with mechanical strength is observed, posing a challenge in optimising SPEs for structural supercapacitor composites. Flexural testing reveals reduced mechanical properties compared to the resin control (E = 35 MPa vs. control E = 1638 MPa), attributed to faster curing times and reduced resin content of SPEs. Thermo-gravimetric analysis highlights the thermal stability (Td > 210 °C) of these electrolytes. Electrochemical assessments of prototype carbon fiber capacitor devices, 23 % higher capacitance of G4 than G3 (5.5 mF/g vs. 4.5 mF/g), underscore the potential of these SPEs for structural energy storage applications. This comprehensive investigation provides key insights into the relationship between composition and performance in bicontinuous SPEs, contributing to the optimisation of structural supercapacitors.
科研通智能强力驱动
Strongly Powered by AbleSci AI