Quasi solid electrolyte

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Quasi solid electrolyte

Quasi solid electrolyte

Quasi solid state electrolyte (QSSE) is usually confused with SPE, also known as gel polymer electrolyte (GPE), but they have very different ionic conduction mechanisms: SPE is used to conduct ions with the substituents of polymer chains, while GPE mainly conducts ions in solvents or plasticizers.

They consist of polymer networks that swell in solvents containing active ions, so they have both solid mechanical properties and liquid high transport properties.

By using the same polymers as SPE (such as PEO, pan, PMMA, PVDF-HFP, etc.), several GPEs with multiple polymer bodies have been studied, but the porosity increases after synthesis, which makes it easy to distribute low evaporation, such as ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), dimethyl carbonate (DMC) used as plasticizer.

Low molecular weight polyethylene glycol (PEG) or other ethers with high dielectric constant or aprotic organic solvents such as dimethyl sulfoxide (DMSO) can also be mixed with SPE matrix. UV and thermal crosslinking are useful methods for in-situ polymerization of GPE in direct contact with electrode to achieve perfect adhesion interface.

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