Method for preparing polyaniline and modifying lead storage battery positive pole plate

Abstract

The invention discloses a method for preparing polyaniline and modifying a lead storage battery positive pole plate. The polyaniline is prepared by aniline oxidization of lead dioxide in a sulfuric acid solution, the generated polyaniline is dispersed and mixed in a lead powder material to obtain a polyaniline-dispersed lead paste material, the polyaniline-dispersed lead paste material is directlyused as a raw material of a storage battery positive active substance and is coated on a positive grid, the polyaniline-modified positive green plate is obtained by coating, filling, curing and drying, the positive green plate is used for performing electrochemical formation of an electrochemical formation liquid in a rare-earth ion-containing sulfuric acid aqueous solution, during the battery formation process, a lead compound on the positive green plate is converted to the lead dioxide, meanwhile, a variable-valence rare-earth ion RE<3+> is subjected to oxidization reaction at a positive electrode to generate RE<4+>, the positive grid and the positive active substance of the positive pole plate are further modified by the generated rare-earth high-valance substance, the positive electrode material is synergically modified by the polyaniline and a rare-earth element, and the performance of the lead storage battery is improved. The method is simple, the polyaniline is easily and uniformly mixed and added into the electrode active substance, a small amount of rare earth is uniformly and quantitatively doped to a surface of an electrode, the surface performance control of the electrode is achieved, the equipment investment is low, and the process is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of electrode preparation, and relates to a method for preparing and modifying a positive plate of a lead storage battery with polyaniline. Background technique [0002] 1. Lead storage battery [0003] Lead-acid batteries have the advantages of simple structure, convenient use, reliable performance, and low price. Therefore, they are widely used in various sectors of the national economy. They have always been the product with the largest output and wide application range in chemical power sources. In terms of R&D and application, the performance of lead-acid batteries has been greatly improved, and the advantages of new lead-acid batteries in some special application fields have become more apparent. As electric mopeds, special electric vehicles, and new-type automobile power supplies, they are still mainstream power supplies in the near future. However, the high-current discharge characteristics of power-...

AI Technical Summary

Problems solved by technology

However, as the positive electrode active material of lead-acid battery lead dioxide, especially when the lead-acid battery is in the process of fast charging and discharging, more importantly, in the process of dynamic charging and discharging (such as in the process of starting, fast charging, etc. of electric vehicles), the most The fast and effective method is to use capacitor technology for fast charging and discharging. Obviously, it is difficult to meet the requirements of fast charging and discharging by using rare earth elements to improve the performance of electrode materials.