Eco-Friendly Mof-199/Phytagel Composite Solid Polymer Electrolytes for Supercapacitors

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Science

Background:

• Liquid electrolytes in energy storage devices present safety and leakage concerns.
• Solid polymer electrolytes (SPEs) are being explored as safer alternatives.
• Developing flexible and high-performance SPEs is crucial for next-generation energy storage.

Purpose of the Study:

• To develop a flexible composite solid polymer electrolyte (CSPE) using MOF-199 and phytagel.
• To investigate the electrochemical performance and stability of the CSPE for energy storage applications.
• To evaluate the potential of this CSPE as an eco-friendly and scalable electrolyte platform.

Main Methods:

• Fabrication of a CSPE using MOF-199, phytagel, NaCl, and glycerol.
• Characterization using Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (PXRD), and field-emission scanning electron microscopy (FESEM).
• Electrochemical performance evaluation including ionic conductivity measurements, cyclic voltammetry (CV), and galvanostatic charge-discharge (GCD) tests.

Main Results:

• The optimized CSPE exhibited an ionic conductivity of 2.31 × 10^-4 S cm^-1 at room temperature.
• Electrochemical tests showed specific capacitances of 139 F g^-1 (at 1 mV s^-1) and stable capacitance of 38 F g^-1 (at 0.1 A g^-1).
• The CSPE demonstrated good cycling durability, maintaining ~89% coulombic efficiency over 1000 cycles with low equivalent series resistance.

Conclusions:

• The developed CSPE is a promising, eco-friendly, and scalable electrolyte material.
• The CSPE offers enhanced safety and performance for various energy storage technologies.
• This research paves the way for advanced solid-state batteries, supercapacitors, and fuel cells.