Solid polymer electrolytes (SPEs) have been proposed to address several issues in Li-ion batteries, including decreased flammability and lithium dendrite growth, and reduced concentration gradients by immobilizing anions to the polymer matrix. Unfortunately, single-ion conducting SPEs continue to suffer from poor lithium-ion conductivity due to the immobilized nature of the anions, poor ion pair dissociation, and the slower time scales of polymer diffusivity compared to liquid electrolytes. Our group investigated cyclic carbonate-based polymer electrolytes to mimic the beneficial properties of commercial carbonate-based liquid electrolytes. A series of copolymers were synthesized varying the structure and composition of the anionic monomer and polar cyclic carbonate containing monomer. The tertiary hydrogen on these carbonate monomers can act as a crosslinking point in free radical polymerizations or UV curing processes to provide robust mechanical properties to the SPEs at elevated temperatures. Although the inherent conductivities of the single-ion SPEs are on the order of 10<sup>-7</sup> mS/cm, addition of choice plasticizers can improve these conductivities to 10<sup>-1</sup> mS/cm, with satisfactory levels of cycling performance.

Cyclic carbonate-based polymer electrolytes for Li-ion batteries

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.