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Updated: May 2, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Low melting non-corrosive asymmetric thioether-TFSI Li salts for solid polymer electrolytes
Vladislav Y Shevtsov1,2, Francesco Gambino3,4, Daniil R Nosov1
1Functional Polymeric and Particulate Materials Unit, Luxembourg Institute of Science and Technology (LIST), 28 avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg. alexander.shaplov@list.lu.
None:
High crystallinity in PEO-based solid polymer electrolytes limits ion transport and stability in Li-metal batteries. Two asymmetric, low-melting thioether-TFSI Li salts were synthesized via a thiol-ene route and incorporated into PEO. They suppress crystallinity while maintaining conductivity and electrochemical performance, and reduce Al corrosion via stable passivation layer formation. The resulting SPEs have improved Li compatibility and enable stable Li||LiFePO4 cells cycling with high capacity retention and coulombic efficiency.
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