| Polymer electrolytes for electrochemical capacitors in place of liquid electrolytes were developed to prevent issues such as leakage and safety concerns. Currently, there is a lack of available OH--ion conducting polymer electrolytes compared to Li+-ion and H +-ion conducting ones. OH--ion conducting polymer electrolytes with high ionic conductivity and environmental stability in ambient conditions are required. TEAOH-PVA polymer electrolyte, a suitable replacement for KOH-PVA, demonstrated similar pristine ionic conductivities and superior shelf-life in ambient conditions. TEAOH-PVA also revealed the highest ionic conductivity compared to TEAOH-PEO and TEAOH-PAA polymer electrolytes. Optimization of TEAOH-PVA via light cross-linking produced a polymer electrolyte with a high ionic conductivity of 1 x 10-2 S cm-1 and stable shelf-life over a period of 80 days. An EDLC device made with this polymer electrolyte yielded an excellent capacitance of 110 muF at 120 Hz, appropriate for high frequency filtering applications. |
