Ultrahigh-voltage electrolyte solute and preparation method thereof

The invention relates to the technical field of electrolytes and particularly to an ultrahigh-voltage electrolyte solute and a preparation method thereof. The ultrahigh-voltage electrolyte solute is composed of mannitol, boric acid, dodecanedioic acid and ethylene glycol in a weight ratio of 5-15: 10-20: 5-15: 50-80. Used in an electrolyte, the electrolyte solute has sparking voltage as high as 550V, electric conductivity of 1.2ms/cm, good electrochemical properties, high electric conductivity and ultrahigh voltage, and can be used for manufacture of ultrahigh-voltage aluminum electrolytic capacitors. 本发明涉及电解液技术领域，具体涉及种超高压电解液溶质及其制备方法所述超高压电解液溶质由甘露醇、硼酸、十二双酸和乙二醇以重量比5-15：10-20：5-15：50-80组成。本发明的电解液溶质用于电解液中，其闪火电压可以达到550V，电导率可以达到1.2ms/cm，具有良好的电化学特性，具有高电导率和超高压的优点，可应用于超高压铝电解电容器的制造。