High-stability vanadium ion electrolyte

• Main Authors: YUAN YUHE, ZHOU HANTAO, CAI ZHONGWEI, GU JINXIN, LIU CHUNMING
• Format: Patent
• Language: Chinese; English
• Published: 28.04.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The high-stability vanadium ion electrolyte comprises vanadium sulfate salt, sulfuric acid, water and an additive, the additive comprises at least one of alkali metal salt, a hydroxyl-containing substance and a surfactant, and the alkali metal salt comprises potassium sulfate, dipotassium phosphate, sodium dihydrogen phosphate, pyrophosphoric acid, potassium pyrophosphate and sodium pyrophosphate; the hydroxyl-containing substance comprises ethanol, glycerol, polyethylene glycol, acetic acid, oxalic acid, phosphoric acid and sulfuric acid; the surfactant comprises dodecyl trimethyl ammonium chloride, dodecyl trimethyl ammonium bromide, cetyl trimethyl ammonium chloride (CTAC), cetyl trimethyl ammonium bromide (CTAB) and dodecyl dimethyl betaine; the novel additive combination is added into the vanadium ion electrolyte, the precipitation of V (V) and the oxidation of V (II) are effectively inhibited by utilizing the synergistic effect among the additive components, the stability of the electrolyte is greatly i