A Methyl Propionate-Based Electrolyte for Wide-Temperature Sodium-Ion Batteries

High-concentration electrolytes (HCE) with unique anion-rich solvation chemistry have attracted extensive attention for sodium-ion full batteries. Unfortunately, they suffer from unsatisfactory physicochemical properties, which inevitably hinder their practical application. Herein, a trade-off between the physicochemical properties and anion-rich solvation chemistry in HCE is achieved by employing methyl propionate (MP) with moderate coordination ability and low viscosity as the sole solvent. The enhanced ionic conductivity and low viscosity of the MP-based HCE significantly enhance ion transport efficiency and electrode wettability, whereas the anion-rich solvation chemistry promotes the formation of robust…

• NN
  National Natural Science Foundation of China

  Awards: 52202286, 52250710680, 22309002, 52171217
• AP
  Anhui Postdoctoral Science Foundation

  Award: 2025B1045
• SA
  Science and Technology Plan Project of Wenzhou, China

  Awards: ZG2024055, ZG2022032
• BR
  Basic Research Project of Wenzhou City

  Award: G20220016
• NS
  Natural Science Foundation of Zhejiang Province

  Award: LY24B030006
• KR
  Key Research and Development Program of Zhejiang Province

  Awards: 2023C01232, 2024C01057