Constructing Quasi-Localized High-Concentration Solvation Structures to Stabilize Battery Interfaces in Nonflammable Phosphate-Based Electrolyte.

ABSTRACT: Flame-retardant phosphate-based electrolytes effectively enhance lithium-ion battery safety but suffer from poor compatibility with graphite anodes and high-voltage cathodes, hindering scalability. Fluorinated phosphates, though widely used, increase interfacial resistance at the anode, degrading performance. In this work, carbonate solvents with strong polarity are introduced to prevent tris(2,2,2-trifluoroethyl) phosphate (TFEP) from participating in the solvation structure of lithium ions. This strategy forms a quasi-localized high-concentration solvation structure, thereby restricting the reduction of TFEP and its impact on the graphite anode. The LiNi_0.8Mn_0.1Co_0.1O₂ (NCM811) | Graphite (Gr) pouch cell with optimized electrolyte exhibits a ca

SUBMITTER: Shi C 

PROVIDER: S-EPMC11809392 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature