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Preparation method of lead battery grid alloy containing lead-tin-rare earth-graphene

A lead-acid battery and graphene technology, which is applied in lead-acid batteries, battery electrodes, circuits, etc., can solve the problem of not achieving uniform dispersion of graphene, and achieve the effects of reduced grain size, reduced corrosion, and simple preparation process

Active Publication Date: 2019-02-15
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention still does not realize the uniform dispersion of graphene in the metal matrix

Method used

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  • Preparation method of lead battery grid alloy containing lead-tin-rare earth-graphene
  • Preparation method of lead battery grid alloy containing lead-tin-rare earth-graphene
  • Preparation method of lead battery grid alloy containing lead-tin-rare earth-graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Preparation of lead-graphene composite materials

[0053] (1) Surfactant treatment of graphene powder

[0054] The commercial graphene powder was added to the surfactant solution at a ratio of 80g / L, soaked for 60 minutes, and the soaking process was assisted by ultrasound. After soaking, the graphene powder is washed to neutrality, filtered by suction, and then dried at 100°C. Sodium dodecylbenzene sulfonate was used as the surfactant, and the concentration of the surfactant was 2g / L.

[0055] (2) Configure dispersion plating solution

[0056] The dispersion electroplating solution uses lead citrate plating solution, and the specific formula is: citric acid 90g / L, potassium hydroxide 25g / L, ammonium acetate 85g / L, lead acetate 45g / L, and brightener BD-1 80g / L.

[0057] (3) Add 5g / L graphene powder with surface active treatment to the dispersion electroplating solution, using titanium plate, platinum plate or other inert conductive substrate as anode, pure lead plate of the ...

Embodiment 2

[0088] 1. Preparation of lead-graphene composite materials

[0089] (1) Surfactant treatment of graphene powder. The commercial graphene powder was added to the surfactant solution at a ratio of 300g / L and soaked for 30 minutes. The soaking process was assisted by ultrasound. After soaking, the graphene powder is washed to neutrality, filtered by suction, and then dried at 100°C. The surfactant is cetyltrimethylammonium bromide, and the concentration of the surfactant is 0.1g / L.

[0090] (2) Configure dispersion electroplating solution. The dispersion electroplating solution adopts lead methanesulfonate plating solution, and the specific formula is: 40g / L lead methanesulfonate, 125g / L methanesulfonic acid, 0.25g / L salicylaldehyde alkyl ether, and 0.1g / L bismuth nitrate.

[0091] (3) Add 15g / L graphene powder with surface active treatment to the dispersion electroplating solution, using titanium plate, platinum plate or other inert conductive substrate as anode, pure lead plate of ...

Embodiment 3

[0106] 1. Preparation of lead-graphene composite materials

[0107] The preparation method is the same as in Example 2.

[0108] 2. Preparation of master alloy

[0109] The master alloy formula is as follows: tin 5.0%, lanthanum 0.2%, cerium 0.5%, lead as the balance, the above proportions are all weight percentages.

[0110] The preparation process steps of the mother gold are the same as in Example 1.

[0111] 3. Preparation of lead-acid battery grid

[0112] The grid alloy formula is as follows: tin 0.5%, lanthanum 0.02%, cerium 0.05%, lead-graphene composite material 4.0%, lead as the balance, the above proportions are all weight percentages.

[0113] The process steps for preparing the grid alloy are the same as in Example 1.

[0114] 4. Grid performance test of lead battery

[0115] The detection method is the same as in Example 1.

[0116] The results are shown in Table 3.

[0117] table 3

[0118]

[0119] The alloy formula of the above control 1 is tin: 0.5%, and lead as the balance. ...

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Abstract

The present invention discloses a preparation method of a lead-acid battery grid alloy containing lead tin-rare earth-graphene. The method includes a first step of preparing a lead-graphene composite material; a second step of preparing a grid mother alloy; and a third step of preparing the grid alloy, wherein the grid alloy includes the following components by mass percentage: 0.1-1.0% of tin, 0.01-0.2% of lanthanum, 0.05-0.5% of cerium, 0.5-10.0% of lead-graphene composite material, and the balance of lead. In the method, due to addition of the rare earth element, grain and grain boundary characteristics of the alloy are improved remarkably, grain size is reduced substantially, grain boundary area is increased, and corrosion amount is reduced substantially under the same current density. A lead-graphene composite material is deposited on a pure lead plate by using a composite electroplating technology, so as to be directly used as a material to be smelted in later preparation process of the grid alloy, so that the preparation method of the grid alloy is simplified.

Description

Technical field [0001] The invention relates to the technical field of lead storage battery manufacturing, in particular to a method for preparing a lead storage battery grid alloy containing lead-tin-rare earth-graphene. Background technique [0002] Lead alloy is the battery grid material, and its corrosion resistance directly affects the cycle life of the battery. At present, lead-calcium-tin-aluminum alloy is mainly used as the grid material, which has high hardness and can ensure industrial production. However, because elemental calcium mainly exists in the grain boundary in the form of calcified lead, its corrosion resistance is poor, and the alloy is likely to cause early capacity loss of the battery. Therefore, new additives are selected to ensure the hardness of the alloy while improving its resistance. Corrosion performance is the focus of lead battery research. [0003] Since the corrosion of lead alloys mainly starts from the grain boundaries and continues to deepen, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/68H01M10/06
CPCH01M4/665H01M4/685H01M10/06Y02E60/10
Inventor 陈飞张峰博陈跃武孔春凤郭志刚梅园何英朱铭
Owner TIANNENG BATTERY GROUP
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