Extending the lifespan of lithium-metal batteries using a fluorinated ether diluent

Fluorinated cyclic ether with minimized Li-ion coordination and the promoted stable SEI. The six-membered fluorinated cyclic ether shows minimized Li-ion coordination and thus tailors the proximity of dual anions around the Li ions, resulting in the generation of a differentiated dual-anionderived SEI. The developed dual-salt electrolyte using the minimized Li-ion coordination diluent promotes the formation of a predominantly inorganic, bilayer SEI composed of an inner layer enriched with Li2O and an outer layer rich in LiF, collectively enhancing the reversibility and passivation of the Li-metal anode. Credit: Li et al.

The design of battery technologies with increasingly longer lifespans …

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