Non-Flammable Ester Electrolyte with Boosted Stability Against Li for High-Performance Li Metal Batteries.

ABSTRACT: In traditional non-flammable electrolytes a trade-off always exists between non-flammability and battery performance. Previous research focused on reducing free solvents and forming anion-derived solid-electrolyte interphase. However, the contribution of solvated anions in boosting the stability of electrolyte has been overlooked. Here, we resolve this via introducing anions into Li⁺ solvation sheaths using anions with similar Gutmann donor number (DN) to that of solvents. Taking trimethyl phosphate fire-retardant (DN=23.0 kcal mol^-1 ) and NO₃ ^- (DN=22.2 kcal mol^-1 ) as an example, NO₃ ^- is readily involved in the Li⁺ solvation sheath and reduces the polarity of solvent. This results in boosted stabilit

SUBMITTER: Wang Z 

PROVIDER: S-EPMC9825921 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature