The Polymer Society of Korea

기능성 고분자

포스터발표

Solid-State Polymer Electrolytes Based on Ion Conduction through Dynamic Exchange Reactions 

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Polymer electrolytes are used for their high stability, but generally suffer from low ionic conductivity. The ionic conductivity (σ) of polymer electrolytes is proportional to the ion mobility (µ) and charge concentration (ρ). Increasing the ion concentration requires more polar functional groups in the polymer, restricting ion mobility by increased T_g. Conversely, introducing non-polar groups to increase ion mobility decreases ion solubility and ion concentration.
In this study, we introduce a polymer electrolyte incorporating disulfide groups to overcome the traditional trade-offs. Dynamic exchange reactions between the disulfide polymer matrixes enhance ion mobility while achieving high ion concentration through dynamic grafting between the disulfide lithium salt and the disulfide polymer matrix. This polymer electrolyte can boost ionic conductivity not only through ion conduction by ion hopping but also through additional ion conduction via dynamic exchange reactions.

3PS-219

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