Polymer Electrolyte Composition for High Lithium-Ion Transport

The patent extracts the harmful anion migration component from the electrolyte system by using a polymer electrolyte where the polymer chains themselves provide the ion conduction pathway. The polymer structure with alkali metalized phenolic hydroxyl groups and tertiary amino groups creates a system where cation transport is facilitated while anion migration is suppressed, effectively removing the harmful effect of anion movement.

The patent employs a composite polymer structure combining multiple functional units: structural unit (A) with alkali metalized phenolic hydroxyl groups for cation coordination, structural unit (B) with tertiary amino groups for additional cation interaction, and structural unit (C) as the polymer backbone. This composite structure creates selective ion transport channels that enhance alkali metal ion transport while blocking anion migration.

The patent segments the polymer structure into distinct functional units: structural unit (A) containing alkali metalized phenolic hydroxyl groups, structural unit (B) containing tertiary amino groups, and structural unit (C) as the backbone. Each segment performs a specific function in ion transport, allowing the complex overall structure to be designed and synthesized through modular approaches, thereby managing manufacturing complexity.

The patent optimizes the mole ratios of structural units (A), (B), and (C) to achieve desired transport properties. By adjusting these compositional parameters within specific ranges, the polymer electrolyte achieves high alkali metal ion transport numbers while maintaining feasible synthesis conditions and manageable structural complexity.