Method for preparing positive plate of lead storage battery

A technology for lead-acid batteries and positive plates, applied in the field of preparation of electrode materials, which can solve problems such as corrosion conductivity, insufficient contact adhesion, and shedding of positive active materials, and achieve the effects of improving conductivity, improving mechanical properties, and improving performance

Active Publication Date: 2010-09-22
JIANGSU HUAFU STORAGE NEW TECH DEV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] 1. There are problems of corrosion and reduced conductivity of the positive grid during use: during the use of the positive grid, especially under the operating conditions of overcharging, the grid is prone to oxidation reaction, corrosion and reduced conductivity;
[0023] 2. The performance deterioration of the positive active material: With the increase of the number of charge and discharge cycles, the discharge capacity gradually decreases
The main problem is that the particle binding force is reduced, the electrical contact is broken, and the resistance increases accordingly
In addition, in the later stage of each charge, oxygen is precipitated on the positive electrode, and under the impact of oxygen evolution, it further promotes the weakening of the binding force of the active material, resulting in the falling off of the active material and the poor combination of the grid and the active material. Easy to soften and f

Method used

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  • Method for preparing positive plate of lead storage battery
  • Method for preparing positive plate of lead storage battery

Examples

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Effect test

Embodiment 1

[0063] 1. Preparation of lead-antimony (Pb-Sb) alloy positive electrode grid: first add a certain amount of lead and one-third of the mass of antimony (broken into pieces in advance) in a lead melting pot, and melt at 330°C-400°C , and then heat up to 500°C-550°C, until the solid phase is completely melted, stir evenly, remove the scum, take it out of the pot and cast it into a lead-antimony (Pb-Sb) alloy containing 25% antimony. When the lead-antimony (Pb-Sb) alloy is used as the raw material to melt and cast the grid, a certain amount of high-antimony grid alloy is added with lead and melted to form a lead-antimony (Pb-Sb) alloy with a specified antimony content to obtain lead-antimony (Pb-Sb) alloy positive grid;

[0064] 2. Electrochemical surface modification of the lead alloy positive electrode grid: the lead-antimony alloy positive electrode grid obtained in the above step is used as the anode, and the lead-antimony alloy is used as the cathode. 2 (SO 4 ) 3 and 6.0mo...

Embodiment 2

[0072] 1. Preparation of lead-calcium (Pb-Ca) alloy positive electrode grid: Divide the calcium into several parts, wrap them in paper, put them into small stainless steel baskets with long handles, extend to the bottom of the lead pot and stir until the calcium melts. The reaction of calcium and lead to form a grid alloy is accompanied by obvious sound and light, that is, a lead-calcium (Pb-Ca) grid alloy with a high calcium content is obtained, and the lead-calcium (Pb-Ca) grid alloy is melted and casted as a raw material Made lead-calcium (Pb-Ca) alloy positive grid;

[0073] 2. Electrochemical surface modification of the lead alloy positive electrode grid: the lead-calcium (Pb-Ca) alloy positive electrode grid obtained in the previous step is used as the anode, and the lead-calcium (Pb-Ca) alloy is used as the cathode. 2 (SO 4 ) 3 and 4.0mol / L H 2 SO 4 In aqueous solution, the operating temperature is 50°C, and the apparent operating current density is 100mA / cm 2 Unde...

Embodiment 3

[0081] 1. Preparation of lead-calcium-tin-aluminum (Pb-Ca-Sn-Al) alloy positive electrode grid: first heat and melt lead in a lead melting pot, the temperature does not exceed 550°C, then add Sn and Al in sequence at 550°C Melt and stir well; divide the calcium into several parts, wrap them in paper, put them into small stainless steel baskets with long handles, extend to the bottom of the lead pot and stir until the calcium melts. The reaction of calcium and lead to form a grid alloy is accompanied by distinct sound and light. Using lead-calcium-tin-aluminum (Pb-Ca-Sn-Al) alloy as a raw material to melt and cast the grid to obtain a lead-calcium-tin-aluminum (Pb-Ca-Sn-Al) alloy positive grid;

[0082] 2. Electrochemical surface modification of the lead alloy positive electrode grid: the lead-antimony alloy positive electrode grid obtained in the above step is used as the anode, and the lead-antimony alloy is used as the cathode. 2 (SO 4 ) 3 and 2.0mol / LH 2 SO 4 In aqueou...

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Abstract

The invention discloses a method for preparing a positive plate of a lead storage battery, and belongs to the technical field of preparation of electrode materials, in particular to a process for a preparation method for the lead storage battery. In the method, a lead alloy is used as a raw material, a lead-alloy positive electrode grid formed by fusion and casting is used as the positive electrode and is subjected to surface modification in rare earth sulfate and sulphuric acid solution by an anodic electrochemical oxidation process to prepare a positive plate of the lead storage battery that the surface of the lead alloy is modified by the rare earth; and lead powder, water, sulfuric acid and rare earth oxides or rare earth sulfate and additives are mixed into a lead plaster, and the lead plaster is subjected to plate coating, solidification, drying and formation to prepare the rear-earth modified positive electrode grid of the lead storage battery. The method is simple, reduces the using amount of the rear earth and improves the utilization ratio of the rear earth, avoids the difficulty in preparing the positive electrode grid from the lead-rare earth alloy, is easy to uniformly and quantitatively dope trace rare-earth elements on the surface of the electrode, and realizes the control of the surface performance of the electrode.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials, and in particular relates to a preparation method of a positive plate of a lead storage battery. Background technique [0002] 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 characteristics of high-current discharge of power-type lead-acid batteries currently...

Claims

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Application Information

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IPC IPC(8): H01M4/16H01M4/73H01M4/23
CPCY02E60/126Y02E60/10
Inventor 许文林居春山王雅琼周寿斌储开燕顾立贞姚干兵朱明海张淮浩
Owner JIANGSU HUAFU STORAGE NEW TECH DEV
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