Wide-Temperature Electrolyte Design via Cation-Anion Solvation Engineering for 4.6 V Lithium-Ion Batteries.

ABSTRACT: Conventional lithium-ion batteries (LIBs) employing ethylene carbonate (EC)-based electrolytes and thermally unstable LiPF₆ face dual challenges: sluggish Li-ion transport at low temperatures (≤-20 °C) and severe decomposition at elevated temperatures (≥45 °C). Herein, a synergistic cation-anion solvation engineering strategy is presented for wide-temperature electrolytes, combining EC-free carbonate solvents with a thermally stable ternary lithium salt system. By fine-tuning solvent-salt interactions, the designed electrolyte exhibits facilitated desolvation kinetics and superior ionic conductivity under subzero temperatures (0.19 mS cm^-1 at -60 °C), while also maintaining excellent high-temperature stability. The anion-participated solvation structure induces an ino

SUBMITTER: Zhang H 

PROVIDER: S-EPMC12407330 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature