ELECTROCHEMICAL SUPERCAPACITOR FOR ELECTRIC ENERGY RECOVERY Russian patent published in 2024 - IPC H01G9/02 H01G9/145 H01G11/58 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering, namely to electrochemical devices for accumulation of electric energy, and can be used as a backup power supply for systems requiring high power in a short period of time. Result is provided due to selection of electrolyte compositions, impregnating positive and negative electrodes of supercapacitor, and design of separator, wherein the positive electrode is impregnated with an aqueous solution of salts of lithium bromide and sodium bromide, or zinc bromide, or potassium bromide, or copper bromide, or magnesium bromide from 10 to 70%, in the presence of benzotriazole from 0.1 to 1.5%, the negative electrode is impregnated with an aqueous solution of salts of cadmium bromide and lithium bromide, or sodium bromide, or zinc bromide, or potassium bromide, or copper bromide, or magnesium bromide, or a mixture thereof from 10 up to 85%, with addition of hydrochloric acid, or nitric acid with concentration from 2 to 30%, in presence of benzotriazole with concentration from 0.1 to 1.5%, and the separator located between the negative and positive electrodes is made of successive layers of separator paper, hydrophilic propylene film, cellulose film and separator paper.

EFFECT: proposed electrochemical supercapacitor provides stable and reliable operation at temperature up to minus 40 °C while maintaining high energy characteristics.

1 cl, 1 dwg, 1 tbl, 2 ex