阅读说明：本技术 一种改善铅酸蓄电池负极板硫酸盐化的组分 (Component for improving sulfation of negative plate of lead-acid storage battery ) 是由 李恩雨 蔡先玉 楼志强 卢珊珊 张云云 于 2019-09-25 设计创作，主要内容包括：本发明涉及一种改善铅酸蓄电池负极板硫酸盐化的组分,包括负极铅膏组分和电解液组分,负极铅膏组分按照质量百分比：铅粉100份,去离子水10-11.5份,硫酸11.5-12份,短纤维0.1-0.15份,硫酸钡1.4-1.6份,木素磺酸钠0.2-0.23份,碳黑0.19-0.22份,二氧化钛-石墨烯杂化物0.3-0.6份,电解液组分中添加0.1-0.5wt.％六偏磷酸钠。本发明的目的是克服现有技术存在的缺陷,提供一种减少电解液中的水损耗,以此来防止因电解液饱和导致不断析出PbSO4晶体,以及改善PbSO4晶体对负极板上活性物质影响的改善铅酸蓄电池负极板硫酸盐化的组分。(The invention relates to a component for improving the sulfation of a negative plate of a lead-acid storage battery, which comprises a negative lead plaster component and an electrolyte component, wherein the negative lead plaster component comprises the following components in percentage by mass: 100 parts of lead powder, 10-11.5 parts of deionized water, 11.5-12 parts of sulfuric acid, 0.1-0.15 part of short fibers, 1.4-1.6 parts of barium sulfate, 0.2-0.23 part of sodium lignosulfonate, 0.19-0.22 part of carbon black, 0.3-0.6 part of titanium dioxide-graphene hybrid, and 0.1-0.5 wt.% of sodium hexametaphosphate is added into the electrolyte component. The invention aims to overcome the defects in the prior art and provide a component for improving the sulfation of a negative plate of a lead-acid storage battery, which reduces the water loss in an electrolyte, thereby preventing PbSO4 crystals from being continuously precipitated due to the saturation of the electrolyte and improving the influence of the PbSO4 crystals on active substances on the negative plate.)

1. The component for improving the sulfation of the negative plate of the lead-acid storage battery is characterized in that: comprises a negative lead plaster component and an electrolyte component; the negative lead plaster comprises the following components in percentage by mass: 100 parts of lead powder, 10-11.5 parts of deionized water, 11.5-12 parts of sulfuric acid, 0.1-0.15 part of short fibers, 1.4-1.6 parts of barium sulfate, 0.2-0.23 part of sodium lignosulfonate, 0.19-0.22 part of carbon black and 0.3-0.6 part of titanium dioxide-graphene hybrid; 0.1-0.5 wt.% sodium hexametaphosphate was added to the electrolyte composition.

2. The component for improving the sulfation of the negative plate of the lead-acid storage battery according to claim 1, wherein the component comprises the following components in percentage by weight: the titanium dioxide-graphene hybrid is prepared by a solvothermal method, and the ratio of titanium dioxide: the graphene ratio was 6: 1.

3. The component for improving the sulfation of the negative plate of the lead-acid storage battery according to claim 1, wherein the component comprises the following components in percentage by weight: the electrolyte is sulfuric acid.

Technical Field

The invention relates to the field of lead-acid storage batteries, in particular to a component for improving the sulfation of a negative plate of a lead-acid storage battery.

Background

The lead-acid storage battery has the advantages of mature process, safety, cost performance and the like, and is widely applied to the fields of communication, energy storage and the like. However, due to the development of science and technology, new energy such as lithium ion batteries and the like gradually occupy the market. Therefore, how to improve the performance of the lead-acid storage battery becomes an important way for improving the competitiveness of the lead-acid storage battery.

In a traditional lead-acid storage battery, capacity reduction caused by negative plate sulfation is a main reason for scrapping of the lead-acid storage battery, the chemical principle of the lead-acid storage battery is a process of interconversion of tiny PbSO4 crystal particles attached to battery plates and Pb and PbO2, but after the lead-acid storage battery is used for a period of time, water loss in electrolyte is increased, the crystal particles are continuously precipitated in a crystal form after the lead-acid storage battery is saturated, larger PbSO4 crystals are generated, and PbSO4 crystals are condensed on the surfaces of electrodes to hinder electrochemical reaction, so that the conductivity is reduced, the capacity of the battery is gradually reduced, and finally the battery fails. However, this problem is not solved well, so that the reduction of water loss in the electrolyte to prevent continuous precipitation of PbSO4 crystals due to the saturation of the electrolyte and the improvement of the effect of PbSO4 crystals on the active material on the negative plate are technical defects to be overcome.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a component for improving the sulfation of a negative plate of a lead-acid storage battery, which reduces the water loss in an electrolyte, thereby preventing PbSO4 crystals from being continuously precipitated due to the saturation of the electrolyte and improving the influence of the PbSO4 crystals on active substances on the negative plate.

The technical scheme for realizing the purpose of the invention is as follows: a component for improving the sulfation of a negative plate of a lead-acid storage battery comprises a negative lead plaster component and an electrolyte component; the negative lead plaster comprises the following components in percentage by mass: 100 parts of lead powder, 10-11.5 parts of deionized water, 11.5-12 parts of sulfuric acid, 0.1-0.15 part of short fibers, 1.4-1.6 parts of barium sulfate, 0.2-0.23 part of sodium lignosulfonate, 0.19-0.22 part of carbon black and 0.3-0.6 part of titanium dioxide-graphene hybrid; 0.1-0.5 wt.% sodium hexametaphosphate was added to the electrolyte composition.

Preferably, the titanium dioxide-graphene hybrid is prepared by a solvothermal method, and the ratio of titanium dioxide: the graphene ratio was 6: 1.

Preferably, the electrolyte is sulfuric acid.

After the technical scheme is adopted, the invention has the following positive effects:

(1) the titanium dioxide-graphene hybrid prepared by a hot melting method is added into the negative lead plaster component, wherein the graphene can increase the conductivity of an active substance, and the titanium dioxide occupies the pores of the negative active substance, so that electrolyte can enter the active substance, the interaction between the electrolyte and the active substance is enhanced, the interconversion between PbSO4 crystal particles and Pb and PbO2 is promoted, and the growth of PbSO4 crystals is inhibited.

(2) According to the invention, sodium hexametaphosphate is added into the electrolyte, so that the water loss in the electrolyte can be reduced, and the phenomenon that the precipitation of PbSO4 crystals and the condensation on the surface of an electrode are accelerated due to the water loss is avoided.

(3) Experiments prove that the problem of sulfation of the lead-acid storage battery is improved to a certain extent by adding the titanium dioxide-graphene hybrid into the negative lead plaster component and adding the sodium hexametaphosphate into the electrolyte component, the cycle life of the lead-acid storage battery is prolonged, the added cost is wide in source, the adding mode is convenient and fast, and the industrial production period is not influenced.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a table of experimental data for an embodiment of the present invention;

FIG. 2 is a 100% cycle life test curve for lead acid batteries.

Detailed Description

The invention comprises a negative lead plaster component and an electrolyte component; the negative lead plaster comprises the following components in percentage by mass: 100 parts of lead powder, 10-11.5 parts of deionized water, 11.5-12 parts of sulfuric acid, 0.1-0.15 part of short fibers, 1.4-1.6 parts of barium sulfate, 0.2-0.23 part of sodium lignosulfonate, 0.19-0.22 part of carbon black and 0.3-0.6 part of titanium dioxide-graphene hybrid. The titanium dioxide-graphene hybrid is prepared by a solvothermal method, and the ratio of titanium dioxide: the graphene ratio was 6: 1. 0.1-0.5 wt.% of sodium hexametaphosphate is added into the electrolyte, wherein the electrolyte is sulfuric acid, and the sodium hexametaphosphate added into the electrolyte is white powder.

(example 1)

The formula of the negative lead plaster comprises the following components in percentage by mass: 100 parts of lead powder, 10 parts of deionized water, 12 parts of sulfuric acid, 0.15 part of short fibers, 1.6 parts of barium sulfate, 0.22 part of sodium lignosulfonate, 0.2 part of carbon black and 0.6 part of titanium dioxide-graphene hybrid. 0.1 wt.% sodium hexametaphosphate was added to the electrolyte.

(example 2)

The formula of the negative lead plaster comprises the following components in percentage by mass: 100 parts of lead powder, 11.5 parts of deionized water, 11.5 parts of sulfuric acid, 0.1 part of short fibers, 1.4 parts of barium sulfate, 0.2 part of sodium lignosulfonate, 0.22 part of carbon black and 0.3 part of titanium dioxide-graphene hybrid. 0.5 wt.% sodium hexametaphosphate was added to the electrolyte.

(example 3)

The formula of the negative lead plaster comprises the following components in percentage by mass: 100 parts of lead powder, 10.5 parts of deionized water, 11.8 parts of sulfuric acid, 0.2 part of short fibers, 1.6 parts of barium sulfate, 0.23 part of sodium lignosulfonate, 0.19 part of carbon black and 0.4 part of titanium dioxide-graphene hybrid. 0.4 wt.% sodium hexametaphosphate was added to the electrolyte.

The negative lead paste and the electrolyte are prepared according to the proportion of the embodiment 1-3, the sample battery is prepared by adopting the conventional positive plate, and the 100 percent cycle life test and the water loss test are carried out on the sample battery according to the national standard GBT 22473-. The contrast item is that titanium dioxide-graphene hybrid is not added in the negative lead paste, and sodium hexametaphosphate is not added in the electrolyte. The results of the test are shown in FIG. 1 and FIG. 2.

According to the test results, compared with the comparative items, the water loss of the examples 1 to 3 in the invention is reduced by 28 to 53 percent, which shows that the water loss phenomenon of the battery can be improved by adding the sodium hexametaphosphate; in addition, the capacity of the 100% cycle of the comparative item is lower than 80% of the rated capacity after 108 cycles, and the capacity of the battery prepared according to the formula of the invention, namely the batteries of examples 1 to 3 are cycled for 279-299 times, is 80% of the rated capacity, which shows that the effect of adding the titanium dioxide-graphene hybrid and the sodium hexametaphosphate to improve the cycle life of the battery is obvious.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.