New Cross-Linked Polyether Electrolyte Enhances Lithium Metal Battery Performance
Researchers from South China Normal University have developed a cross-linked poly(tetrahydrofuran) electrolyte that significantly improves lithium metal battery performance, achieving high oxidation stability and ionic conductivity. This advancement has implications for electric vehicles and energy storage, enabling operation across extreme temperatures without compromising safety.
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A new cross-linked poly(tetrahydrofuran) electrolyte enhances the performance of lithium metal batteries, achieving oxidation stability to 4.9 volts and ionic conductivity of 3.3 mS/cm at room temperature. This electrolyte, developed through in-situ polymerization, ensures excellent electrode wetting and compatibility with existing manufacturing processes.
The design replaces traditional monomers with tetrahydrofuran and incorporates ethylene glycol diglycidyl ether as a cross-linker, boosting lithium ion mobility while using lithium difluoro(oxalato)borate to form a protective interphase on the electrodes. This innovation allows stable cycling at 4.5 volts across a temperature range of -40°C to 55°C, supporting applications in electric vehicles and grid-scale energy storage. The method's compatibility with current production lines may accelerate commercialization.
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