Synthesis and Characterization of Quadrupolar-Hydrogen-Bonded Polymeric Ionic liquids for Potential Self-Healing Electrolytes

Li, C. et al., Polymers, 2022, 4090,

Within the era of battery technology, the urgent demand for improved and safer electrolytes is immanent. In this work, novel electrolytes, based on pyrrolidinium-bistrifluoromethanesulfonyl-imide polymeric ionic liquids (POILs), equipped with quadrupolar hydrogen-bonding moieties of ureido-pyrimidinone (UPy) to mediate self-healing properties were generated. By combining the results from differential scanning calorimetry (DSC), broadband dielectric spectroscopy (BDS), and rheology, a decoupled conductivity of the POILs from the glass transition was revealed. Tensile tests for both pristine and self-healed samples, evidenced a rational design of self-healing electrolytes bearing both hydrogen bonding moieties and low-molecular-weight polymeric ionic liquids.