Single-ion conducting polymer electrolytes (SCPEs) are well recognized being the advanced electrolyte system with increased energy efficiency and prolonged cell lifetime due to their capability to mitigate electrode polarization and reduce electrolyte loss. Fabrication of stretchable SCPEs will definitely benefit the future stretchable batteries/electronics considering the advantageous electrolyte performance of the SCPE based systems, while no one report the SCPEs with specific mechanical performance. Herein, we will report the fabrication of a series of single-ion conducting polymer electrolyte membranes with high flexibility and stretchability. Polydimethylsiloxane (PDMS) network and polyethylene glycol (PEG) side chains are critical in retaining their satisfied mechanical and electrochemical performance. The investigation revealed that the incorporation of poly(ethylene glycol) methyl ether methacrylate (PEGMEMA) plays a significant role in forming the stretchable polymer membranes, which can not only lower the glass transition temperature but also provide additional reactivity. The obtained membranes exhibited 88%-252% elongation before breaks, and the mechanical properties, including Young’s modulus, toughness and tensile strength, are well adjustable by tuning the crosslinking density. Galvanostatic test of the assembled cells using the obtained SCPE member exhibited satisfied cycling performance with capacity retention up to 81.5% after 100 cycles.

Elastic single-ion conducting polymer electrolyte

2019 Spring National Meeting

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