Design of Localized High-Concentration Electrolytes via Donor Number

Salt-concentrated electrolytes offer properties beyond conventional dilute electrolytes yet suffer from high cost and viscosity which hinder their practical applications. Introducing a secondary solvent as a diluent could reduce the salt content while maintaining the local solution structure of salt-concentrated electrolytes, giving rise to localized high-concentration electrolytes (LHCEs). Through a comprehensive investigation involving over 500 samples, we find that the dielectric constant of solvent, a widely used parameter for electrolyte design, does not serve as a useful screening criterion for diluents; instead, donor number (DN) is an effective design parameter to achieve LHCE structure─i.e., the…

• ZP
  Zhejiang Provincial Postdoctoral Science Foundation

  Award: ZJ2020079
• NN
  National Natural Science Foundation of China

  Award: 21975207
• NS
  Natural Science Foundation of Zhejiang Province

  Award: LQ21B030006