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Alkaline secondary battery positive electrode material and alkaline secondary battery

A cathode material, secondary battery technology, applied in the direction of alkaline storage battery electrodes, alkaline storage batteries, battery electrodes, etc., can solve problems such as poor self-discharge performance, improve self-discharge performance, delay dissolution, and reduce cobalt precipitation Effect

Inactive Publication Date: 2009-07-08
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the disadvantage of poor self-discharge performance of the existing alkaline secondary battery positive electrode material, and provide a kind of alkaline secondary battery positive electrode material with better self-discharge performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation method of the negative electrode is known to those skilled in the art. For example, the main components of the negative electrode material, the binder and the solvent and the conductive material optionally contained are mixed into a paste, coated and / or filled in a paste. On the conductive substrate, dry and press-molded or not, it becomes the negative electrode of the battery.

[0031] The electrolyte is the electrolyte used in alkaline secondary batteries, such as one or more of potassium hydroxide aqueous solution, sodium hydroxide aqueous solution, and lithium hydroxide aqueous solution. The concentration of the electrolyte solution is generally 4-9 equivalents / liter.

[0032] A separator is arranged between the prepared positive electrode and the negative electrode to form an electrode group, the electrode group is accommodated in a battery case, an electrolyte solution is injected, and then the battery case is sealed to obtain an alkaline secondary...

Embodiment 1

[0035] This embodiment illustrates the positive electrode material provided by the present invention, the alkaline secondary battery containing the positive electrode material, and the preparation method thereof.

[0036] (1) Preparation of positive electrode

[0037] 100 parts by weight of spherical nickel hydroxide, 5 parts by weight of cobaltous oxide, 0.5 parts by weight of metal molybdenum powder, 5 parts by weight of carboxymethyl cellulose aqueous dispersion (containing 1% by weight of carboxymethyl cellulose) , 2 parts by weight of polytetrafluoroethylene (PTFE) dispersion (a standard commodity with a solid content of 60% by weight), 20 parts by weight of water are mixed and stirred to form a paste slurry, and the slurry is filled with a surface density of 430g / m 2 , One side is welded with nickel foam with strip-shaped drainage terminals, and then dried, rolled, and cut to obtain a positive plate with a size of 85 mm × 40 mm × 0.65 mm. Among them, the content of nick...

example 2-9

[0046] This embodiment illustrates the positive electrode material provided by the present invention, the alkaline secondary battery containing the positive electrode material, and the preparation method thereof.

[0047] The battery positive electrode material and battery were prepared according to the method of Example 1, except that when preparing the positive electrode, metal powder was added as shown in Table 1, and the amount of cobalt oxide added was 2.5 parts by weight to prepare batteries B2-B9.

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PUM

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Abstract

A positive electrode material of basic secondary battery is formed by nickel hydroxide powder, Co additive, binder and metal powder being prepared by one or a numbers of metals as V, Ti, Mo, Mn, Nb, Hf, Zr, Y and Ta. The basic secondary battery applying said positive electrode material is also disclosed.

Description

technical field [0001] The present invention relates to an alkaline secondary battery positive electrode material and an alkaline secondary battery. Background technique [0002] Alkaline secondary batteries, such as nickel-cadmium secondary batteries, nickel-zinc secondary batteries, or nickel-hydrogen secondary batteries, generally include an electrode group and an alkaline electrolyte that are sealed in a battery case. The electrode group includes a positive electrode, a negative electrode and a separator. The positive electrode includes a conductive substrate and a positive electrode material coated and / or filled on the conductive substrate, the positive electrode material containing nickel hydroxide powder and a binder as main components. The negative electrode comprises a negative electrode conductive substrate and a negative electrode material coated and / or filled on the negative electrode conductive substrate, the negative electrode material contains a main componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/52H01M4/38H01M4/36H01M4/62H01M4/24H01M10/24
CPCY02E60/124Y02E60/10
Inventor 周文会
Owner BYD CO LTD
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