# Combined Effects of PVDF/PEO-EC GEL Polymer Electrolytes for High-Performance Hybrid Electrochemical Supercapacitors

## TL;DR

This paper explores a polymer electrolyte blend that improves the performance of hybrid supercapacitors by enhancing conductivity and capacitance.

## Contribution

The study introduces a novel plasticized polymer electrolyte with 40% EC that significantly boosts supercapacitor performance.

## Key findings

- The 40% EC-based PPE achieved 313.3% liquid electrolyte absorption and 2.08 mS/cm ionic conductivity.
- The hybrid supercapacitor with 40% EC-based PPE showed superior capacitance and retention after 10,000 cycles.
- Incorporating EC increased pore volume and size, enhancing the electrolyte's performance.

## Abstract

This article delineates the electrical characteristics and usefulness of a plasticized polymer electrolyte (PPE) manufactured from PVDF/PEO blends, using varying weight percentages of the plasticizer ethylene carbonate (EC) in conjunction with a liquid electrolyte. Micro-porous solid-state polymer electrolyte membranes were fabricated using the non-solvent-induced phase separation (NIPS) method. The polymer composite membranes modified by the incorporation of a plasticizer (40 weight percent of EC) exhibited enhanced porosity and absorbed a significant quantity of liquid electrolyte (313.3%). A N2 adsorption isotherm study indicates an increase in pore volume and pore size resulting from the incorporation of EC in PPE. This resulted in a satisfactory level of ionic conductivity (2.08 mS/cm) at 25 °C, attributable to the inclusion of 40 wt.% EC-based PPE, which has a high dielectric constant and a rapid relaxation time. The AC/40 wt.% EC-based PPE/LTO hybrid supercapacitor exhibits a superior specific capacitance, reduced internal resistance, and enhanced retention values after 10,000 cycles in comparison to the AC/10 wt.% EC-based PPE/LTO hybrid supercapacitor.