Tailored electrolyte salt anion chemistry for enhanced high-nickel lithium-ion batteries.

ABSTRACT: The instability of lithium salts within the electrolyte has consistently posed a significant challenge to next-generation lithium-ion batteries. The most commercialized lithium hexafluorophosphate (LiPF₆) suffers from ligand abstraction, causing excessive formation of erosive HF at elevated temperatures. Another promising salt of lithium difluoro(oxalato)borate (LiDFOB), featuring hydrophilic/lithiophilic carbonyl groups, possesses high moisture sensitivity and insufficient dissociation in electrolytes. Herein, we propose an anion-skeleton editing strategy that increases the fluoride ion affinity of the parent Lewis acid while reducing its interaction with H⁺/Li⁺ by replacing the carbonyl groups in DFOB^- anion with hydrophobic/lithiophobic -CF

SUBMITTER: Wang S 

PROVIDER: S-EPMC12714861 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature