This technology is a polymer solid electrolyte that improves the low ionic conductivity and electrochemical instability of conventional polymer electrolytes by incorporating imidazolium-based organic ionic plastic crystals (OIPC), which remain in a solid state at room temperature, into an ion-conductive polymer matrix.
Conventional polymer solid electrolytes have faced challenges in commercialization due to lower ionic conductivity and lithium-ion transference numbers compared to liquid or inorganic electrolytes. Furthermore, when used with lithium metal anodes, they suffer from dendrite growth, which reduces battery lifespan.
This technology involves creating an electrolyte by mixing an ion-conductive polymer, such as polyalkylene oxide, with organic ionic plastic crystals composed of imidazolium cations and halogen anions (Cl-, Br-, I-), along with a lithium salt. This achieves an ionic conductivity of 1.0x10^-3 S/cm or higher at room temperature and stabilizes the interface with the lithium metal anode. It can be applied to all-solid-state batteries using lithium metal anodes and power sources for wearable and flexible devices that are free from leakage risks, accelerating the design of polymer all-solid-state cells capable of operating at room temperature without the need for external heating.
US2026-0204637A1, WO2025-028858A1
