Two-phase composition additive, application and preparation method of two-phase composition additive

Abstract

The invention provides a two-phase composition additive, application and a preparation method of the two-phase composition additive. The two-phase composition additive is prepared from 10 to 90 volumeparts of a siloxane composition and 10 to 90 volume parts of a silicon dioxide mixture; based on 100 volume parts, the siloxane composition comprises 2 to 12 volume parts of siloxane of which the main chain skeleton is of a (-Si-O-Si-) structure, 2 to 12 volume parts of organic silicon rubber and 76 to 96 volume parts of tetraethyl orthosilicate; based on 100 volume parts, the silicon dioxide mixture comprises 5 to 20 volume parts of fumed silica, 78 to 94.5 volume parts of industrial pure water, and 0.5 to 2 parts of sodium lauryl sulphate; the two-phase composition additive is prepared according to the process method provided by the invention, is used for mixing with sulphuric acid liquid and is added into a lead storage battery so as to enhance the softening resistance of positive active material and help a softened active material to recover hardness; the adding amount is small, and the cost performance is high.

Description

technical field [0001] The invention relates to the technical field of materials for lead storage batteries, in particular to a material formulation, application and preparation method of a two-phase composition additive. Background technique [0002] In recent years, the energy storage market has generally demanded large-capacity batteries for supporting applications. However, conventional batteries have a short lifespan and high waste rate in outdoor use, which restricts the commercial application of energy storage systems. The industry generally agrees that adding an appropriate amount of colloidal substances to the sulfuric acid solution of lead-acid batteries can effectively increase the life of outdoor use. The colloidal material traditionally used in lead storage batteries is fumed silica, which is fully liquefied by industrial pure water or other solvent methods during use; in the Chinese Invention Patent Publication No. CN1383225A, a polyelement siloxane is disclose...

AI Technical Summary

Problems solved by technology

After more than ten years of application, the industry generally believes that fumed silica colloids and siloxane composition colloids have their own advantages and disadvantages. The former has high viscosity but relatively stable life attenuation, while the latter has low viscosity and good workmanship. Lead-acid batteries can reduce internal resistance and increase Gain in capacity, but not as stable as the former

[0003] Complementing the advantages of fumed silica colloids and siloxane composition colloids has always been a technical solution sought by the lead battery industry, but some methods of simply mixing the two finished colloids are not satisfactory. The technical reason is that some finished colloids are used to disperse Good performance, using some emulsifiers that are impurities in the electrolyte of lead-acid batteries. Such emulsifiers are compounds such as Tween and Span series. Although these emulsifiers are added to colloidal silica to obtain a stable microdispersion system, the The electrolyte of lead-acid batteries is an impurity, and the electrochemical performance of lead-acid batteries after adding sulfuric acid solution is not good, such as reducing electrochemical activity and weakening low-temperature charging ability, etc.