Formula and process of all-vanadium redox flow battery electrolyte

Abstract

The invention belongs to the field of electrolyte formulas, and discloses a formula and a process of an all-vanadium redox flow battery electrolyte. The content of elements influencing the resistanceof the electrolyte in the raw material vanadium is limited, after the vanadium raw material containing the elements is completely dissolved to form the electrolyte, the upper limit of the corresponding element content is controlled, and an element content interval for long-time safe operation of the system is given. Compared with an electrolyte system in the prior art, the formula provided by theinvention has the advantages that the system efficiency can still be maintained at a high level, and the electrolyte cost is effectively reduced at the same time.

Description

technical field [0001] The invention belongs to the field of electrolyte formulations, and particularly relates to a formulation and a process of an all-vanadium redox flow battery electrolyte. Background technique [0002] In the prior art, the battery performance is usually improved by adding reactive metal ions. However, studies have found that some of the reactive metal ions are mistakenly introduced into the battery system, which will adversely affect the performance of the battery system, such as the efficiency of the battery system. , Through different action mechanisms (forming non-conductive substances), the conductive resistance of the vanadium electrolyte increases, which in turn increases the internal resistance of the electrolyte and reduces the charge-discharge efficiency. The phenomenon that some impurity ions affect the internal resistance of vanadium electrolyte has been reported in the literature, but the relevant literature on the upper limit of these elem...

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Problems solved by technology

[0002] In the prior art, the performance of the battery is usually improved by adding reactive metal ions, but studies have found that some reactive metal ions are misintroduced into the battery system, which will adversely affect the efficiency and other performance of the battery system. For impurity ions other than vanadium , through different mechanisms of action (formation of non-conductive substances), the conductive resistance of the vanadium electrolyte is increased, which in turn increases the internal resistance of the electrolyte and reduces the charge and discharge efficiency

The phenomenon that some impurity ions affect the internal resistance of the vanadium electrolyte has been reported in the literature, but the relevant literature has not explained the upper limit of these elements

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