Wide-temperature-range deep eutectic electrolyte and preparation method and application thereof

• Main Authors: MEI YUENI, MA YULIN, MA CHI, FU CHUANKAI, CHEN YOUCHI, WANG KE
• Format: Patent
• Language: Chinese; English
• Published: 14.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a wide-temperature-range deep eutectic electrolyte and a preparation method and application thereof, and belongs to the technical field of chemical power sources, the wide-temperature-range deep eutectic electrolyte is composed of ethylene carbonate, butanedinitrile and alkali metal ion salt, the mass ratio of the butanedinitrile to the ethylene carbonate is 4: 6-6: 4, and the concentration of the alkali metal ion salt is 2.5-4 mol/L. The preparation method comprises the following steps: respectively melting ethylene carbonate and succinonitrile, uniformly mixing, and cooling to obtain a deep eutectic solvent; and adding alkali metal ion salt into the deep eutectic solvent, and stirring until the alkali metal ion salt is completely dissolved to obtain the wide-temperature-range deep eutectic electrolyte. The wide-temperature-range deep eutectic electrolyte is applied to an alkali metal ion battery. According to the invention, the deep eutectic solvent with low viscosity, low freezing p