▎ 摘　　要

NOVELTY - Low-temperature electrolyte comprises solvent fluorinated carboxylate, soluble sodium salt and diluent. USE - Low temperature electrolyte is used for sodium ion batteries for portable device power supply, energy storage battery, power battery and other industries. ADVANTAGE - The electrolyte has advantages of an electrolyte that can work normally at low temperature, improves the ion conductivity, reduces the viscosity of the electrolyte at low temperature, and so on. The sodium ion battery device using the electrolyte can still maintain more than 60% of the discharge capacity at 40°C. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a low-temperature sodium ion battery.