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Electrode sheet and its manufacturing method and application

A production method and electrode sheet technology, which are applied in the directions of alkaline storage battery electrodes, hybrid capacitor electrodes, nickel storage batteries, etc., can solve the problems of difficult electrode sheets in the preparation process, and achieve the effect of good performance.

Active Publication Date: 2017-02-22
SHENZHEN HIGHPOWER TECH CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, it is necessary to provide a method for making electrode sheets that can avoid the problem that hydroxide ions affect the thickening effect in the process of making electrode sheets and cause difficulties in the preparation process.

Method used

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  • Electrode sheet and its manufacturing method and application
  • Electrode sheet and its manufacturing method and application
  • Electrode sheet and its manufacturing method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Put spherical nickel and water in a beaker according to the mass ratio of 100:20, mix and stir evenly to obtain an aqueous solution of spherical nickel.

[0038] (2) Add polyacrylic acid to the aqueous solution of spherical nickel in step (1), and stir evenly, wherein the mass ratio of spherical nickel to polyacrylic acid is 100:0.01 to obtain an electrode slurry.

[0039] (3) Coating the electrode slurry on the foamed nickel, drying at 40°C, and rolling to obtain an electrode sheet.

[0040] Store and observe the electrode slurry prepared in step (2), and record the time when the electrode slurry begins to settle. See Table 1 for the settling time. The electrode sheet obtained in step (3) is used as the positive electrode sheet, cut and spot-welded with nickel tabs, wound together with the negative electrode sheet and separator, and then injected, sealed and formed in sequence to make an AAA700 battery, and the battery is tested See Table 1 for the test data of th...

Embodiment 2

[0042] (1) Put spherical nickel and water in a beaker according to the mass ratio of 100:20, mix and stir evenly to obtain an aqueous solution of spherical nickel.

[0043] (2) Add polyacrylic acid to the aqueous solution of spherical nickel in step (1), and stir evenly, wherein the mass ratio of spherical nickel to polyacrylic acid is 100:0.3 to obtain an electrode slurry.

[0044] (3) Coating the electrode slurry on the foamed nickel, drying at 100°C, and rolling to obtain an electrode sheet.

[0045] Store and observe the electrode slurry prepared in step (2), and record the time when the electrode slurry begins to settle. See Table 1 for the settling time. The electrode sheet obtained in step (3) is used as the positive electrode sheet, cut and spot-welded with nickel tabs, wound together with the negative electrode sheet and separator, and then injected, sealed and formed in sequence to make an AAA700 battery and test the battery The internal resistance, the discharge pl...

Embodiment 3

[0047](1) Put spherical nickel and water in a beaker according to the mass ratio of 100:30, mix and stir evenly to obtain an aqueous solution of spherical nickel.

[0048] (2) Add polyacrylic acid to the aqueous solution of spherical nickel in step (1), and stir evenly, wherein the mass ratio of spherical nickel to polyacrylic acid is 100:0.5 to obtain an electrode slurry.

[0049] (3) Coat the electrode slurry on the steel mesh, dry at 270°C, and roll to obtain the electrode sheet.

[0050] Store and observe the electrode slurry prepared in step (2), and record the time when the electrode slurry begins to settle. See Table 1 for the settling time. The electrode sheet obtained in step (3) is used as the positive electrode sheet, cut and spot-welded with nickel tabs, wound together with the negative electrode sheet and separator, and then injected, sealed and formed in sequence to make an AAA700 battery, and the battery is tested See Table 1 for the test data of the internal r...

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Abstract

The invention relates to a production method of an electrode plate. The production method comprises the following steps of mixing nickel balls with water according to the mass ratio of 100:(10 to 30) to obtain a nickel ball aqueous solution; adding a precursor into the nickel ball aqueous solution to obtain an electrode slurry, wherein the mass ratio of the precursor to the nickel ball is (0.01 to 1):100, the precursor is polyacrylic acid, acrylic resin or a cross-linked high-molecular polymer, and the cross-linked high-molecular polymer is formed by copolyerizing acrylic ester and metacrylic acid ester; coating an electrode carrier with the electrode slurry, and drying and rolling the electrode carrier to obtain the electrode plate. By adopting the production method of the electrode plate, the problem of a conventional method that a thickening agent is directly added, so as to cause that the preparation process is difficult can be avoided; moreover, a battery utilizing an electrode which is produced by adopting the production method is good in performance. In addition, the invention also provides an electrode plate and an application of the electrode plate.

Description

technical field [0001] The invention relates to an electrode sheet and its manufacturing method and application. Background technique [0002] In the process of preparing spherical nickel hydroxide (spherical nickel for short) as a positive electrode material for nickel power supply, because the nickel hydroxide crystals are not very densely packed and there are pores, alkali (such as sodium hydroxide) will remain inside the spherical nickel, even after washing. , there will still be part of the alkali remaining in the spherical nickel. In the process of preparing the positive electrode of the nickel-based power supply, when the spherical nickel is mixed with water and a thickener, the alkali remaining in the spherical nickel will dissolve and form hydroxide ions. It has a destructive effect on the molecular chain of the thickener, affects the thickening effect of the thickener, and makes the preparation process difficult. The general solution is to increase the amount of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/26H01M4/32
CPCH01G11/30H01M4/26H01M4/32H01M10/30Y02E60/10
Inventor 谢红波曾小娜张兴蔡小娟廖兴群
Owner SHENZHEN HIGHPOWER TECH CO LTD
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