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Positive pole materical for alkaline secondary battery and alkaline secondary battery

A cathode material, secondary battery technology, applied in alkaline batteries, battery electrodes, nickel batteries, etc., can solve problems such as poor self-discharge performance, and achieve the effects of improving self-discharge performance, delaying dissolution, and improving self-discharge performance

Inactive Publication Date: 2006-06-14
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

example 1

[0029] This example illustrates the positive electrode material provided by the present invention, the alkaline secondary battery containing the positive electrode material and their preparation methods.

[0030] (1) Preparation of positive electrode

[0031] With 100 parts by weight of spherical nickel hydroxide, 5 parts by weight of cobaltous oxide, 0.5 parts by weight of metal tungsten powder, 5 parts by weight of carboxymethylcellulose aqueous dispersion (containing 1% by weight of carboxymethylcellulose) , 2 parts of weight of polytetrafluoroethylene (PTFE) dispersion liquid (solid content is the standard commodity of 60 weight percent), 20 parts of weight of water mixing and stirring, be mixed into pasty slurry, this slurry is filled into surface density of 430 g / m2, one side is welded in nickel foam nickel strip drain terminal, then dried, rolled, and cut to make a positive plate with a size of 85 mm × 40 mm × 0.65 mm, in which the hydrogen oxide The content of nickel ...

example 2

[0040] This example illustrates the positive electrode material provided by the present invention, the alkaline secondary battery containing the positive electrode material and its preparation method.

[0041] Prepare the positive electrode material and the battery according to the method of Example 1, except that when preparing the positive electrode, the addition of metal tungsten powder is 1 part by weight, and the addition of cobaltous oxide is 2.5 parts by weight to make battery B2.

example 3

[0043] This example illustrates the positive electrode material provided by the present invention, the alkaline secondary battery containing the positive electrode material and its preparation method.

[0044] Prepare battery positive electrode material and battery according to the method of example 1 respectively, difference is, when preparing positive pole, the add-on of metal tungsten powder in example 3 is 2 parts by weight, replaces cobaltous oxide with cobalt metal powder and dicobalt trioxide, In terms of cobalt element, the amount of cobalt metal powder and cobalt trioxide is 4 parts by weight and 3 parts by weight to make battery B3.

[0045] The performance of the battery provided by the present invention will be described below.

[0046] (1) The batteries B1-B3 made in Examples 1-3 and the comparative example BB1 ​​were respectively charged at 210mA (0.1C) for 15 hours, left for 30 minutes, and discharged at 630mA (0.3C) to 1.0V.

[0047] (2) After three cycles acc...

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PUM

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Abstract

The invention is a basic secondary cell and the anode material thereof. And the secondary cell comprises electrode group and basic electrolyte, which are sealed in a cell case together, and the electrode group comprises anode, cathode and separator, the anode comprises an anode material, and the anode material comprises the main components: nickel hydroxide powder, cobalt additive and adhesive and also comprises metallic tungsten powder. The secondary cell not only has better initial and after-circulating self-discharging property but also higher discharge capacity.

Description

technical field [0001] The invention relates to an alkaline secondary battery cathode material and the 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 sealed in a battery case. The electrode group includes a positive electrode, a negative electrode and a separator. The positive electrode contains a conductive substrate carrying a positive electrode material containing nickel hydroxide powder and a binder as main components. The negative electrode comprises a conductive substrate loaded with a negative electrode material comprising a main component selected from oxides and / or hydroxides of cadmium, oxides of zinc and / or hydrogen and a binder oxides, or hydrogen storage alloys. The separator is arranged between the positive electrode and the negative electr...

Claims

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Application Information

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IPC IPC(8): H01M4/52H01M4/38H01M4/62H01M10/30
CPCY02E60/10
Inventor 周文会
Owner BYD CO LTD
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