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Eco-Friendly MOF-199/Phytagel Composite Solid Polymer Electrolytes for Supercapacitors
Original title: Eco‐Friendly Mof‐199/Phytagel Composite Solid Polymer Electrolytes for Supercapacitors
Summary
Scientists created a new type of gel-like material—made from a natural plant-based ingredient instead of harsh chemicals—that could replace the flammable liquid electrolytes currently used in batteries and supercapacitors. This matters because safer, eco-friendly energy storage reduces risks like leaks or fires in everyday devices, and using plant-based materials instead of synthetic ones may also mean less chemical waste in the environment. While this research is still in early lab-testing stages, it points toward greener battery technology for the future.
Conventional liquid electrolytes in energy storage devices pose leakage and safety risks, driving interest in solid polymer electrolytes as safer alternatives. In this work, a flexible composite solid polymer electrolyte (CSPE) was developed using MOF‐199 and the natural biopolymer phytagel, with NaCl as the Na + source and glycerol as a plasticizer to enhance ionic mobility. Fourier transform infrared confirmed chemical interactions within the composite, while PXRD verified its crystallinity and structural integrity. Field‐emission scanning electron microscopy images showed a uniform dispersion of metal‐organic framework particles throughout the polymer matrix. The optimized CSPE achieved an ionic conductivity of 2.31 × 10 −4 S cm −1 at room temperature. Electrochemical testing demonstrated excellent performance: cyclic voltammetry yielded specific capacitances of 139 F g −1 at 1 mV s −1 and 69 F g −1 at 5 mV s −1 , indicating efficient ion transport and charge storage. Galvanostatic charge–discharge measurements further confirmed a stable capacitance of 38 F g −1 at 0.1 A g −1 . The CSPE also exhibited good cycling durability, maintaining ∼89% coulombic efficiency over 1000 cycles, with a low equivalent series resistance (∼70 Ω) even at the final cycle. Overall, these findings highlight the CSPE as a promising, eco‐friendly, and scalable electrolyte platform for next‐generation energy storage technologies, including batteries, supercapacitors, and fuel cells.