Method for preparing negative grid of lead storage battery

Abstract

The invention discloses a method for preparing a negative grid of a lead storage battery, which belongs to the technical field of electrode material preparation. In the method, a lead alloy is used as a raw material, a negative grid formed by pouring molten lead alloy serves as a cathode, a cathodic electrochemical reduction technology is used to perform surface modification in aqueous solution of a rare earth sulfate and sulfuric acid, rare earth is used to improve the performance of the surface of the lead alloy negative grid, and thus, the lead storage battery negative grid with a rare earth-modified lead alloy surface is formed. The method avoids the difficulty in the preparation of a rare earth-lead (Pb-Re) alloy, can dope some trace rare earth elements on the surface of an electrodeeasily, uniformly and quantitatively and realize the adjustment of the surface performance of the electrode. The preparation of a rare earth oxide by an electrochemical method has the advantages of ensuring the high purity of the prepared rare earth oxide, making the domain structure of the rare earth oxide adjustable, along with mild operation conditions, simple operation, low preparation cost and the like, and thus, conditions are provided for process industrialization. In the invention, the preparation method is simple, the preparation is convenient and the process is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of preparation of electrode materials, in particular to a method for preparing negative grids of lead storage batteries. Background technique [0002] The working principle of lead-acid batteries is to use electrochemical principles to achieve material and energy conversion. The interface reaction characteristics of electrodes and electrolytes are the core and essence of battery performance. Therefore, for lead-acid batteries, the development of functional electrodes, the use of electrolytes with excellent performance, and the matching optimization of electrodes and electrolytes are extremely important key issues in the development of new lead-acid batteries. [0003] The basic components and materials that make up the lead-acid battery include: positive plate, negative plate, sulfuric acid solution (that is, electrolyte or commonly known as electro-hydraulic), separator, battery tank (including liquid injec...

AI Technical Summary

Problems solved by technology

[0023] 1. Difficulties in the preparation of rare earth metals: rare earth metals are prepared by using rare earth reductions or rare earth salts as raw materials, and are produced by molten electrolysis. The technical requirements for the preparation of rare earth metals by molten electrolytic reduction are high, and the preparation cost of rare earth metals is high;

[0024] 2. Difficulties in the preparation of rare earth lead alloys: Because of the large difference in the physical properties (especially melting point and density) of rare earth element metals and lead, using traditional alloy melting casting technology, it is difficult to add rare earth elements and the composition of rare earth lead alloys is uneven after adding It is necessary to develop a new solution treatment technology to solve the difficult problems of adding rare earth elements and uneven alloy composition after adding;

[0025] 3. It is difficult to use on a large scale: because the preparation cost of rare earth metals and rare earth lead (Pb-Re) alloys is high, by adding rare earth elements to lead alloys, the method of improving the comprehensive performance of battery lead alloys leads to rare earths being modified The production cost of lead or lead alloy is extremely high, and it is difficult to use it on a large scale

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