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 bat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] 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] 100 parts by weight of spherical nickel hydroxide, 5 parts by weight of cobalt oxide, 0.5 parts by weight of metal tungsten powder, and 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 product 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 430 g / m2, in the nickel foam with a nickel strip drain terminal welded on one side, and then dried, rolled, and cut to obtain a positive electrode plate with a size of 85 mm × 40 mm × 0.65 mm, in which the hydroxi...

Example Embodiment

[0039] 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 the preparation method thereof.

[0041] The battery cathode material and battery were prepared according to the method of Example 1, respectively, except that when preparing the cathode, the amount of metal tungsten powder added was 1 part by weight, and the amount of cobalt oxide added was 2.5 parts by weight to form battery B2.

Example Embodiment

[0042] 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 the preparation method thereof.

[0044] The battery cathode material and battery were prepared according to the method of Example 1 respectively. The difference is that when preparing the cathode, the amount of metal tungsten powder added in Example 3 was 2 parts by weight, and cobalt metal powder and cobalt trioxide were used instead of cobalt oxide. Based on the cobalt element, the amounts of cobalt metal powder and cobalt trioxide are 4 parts by weight and 3 parts by weight to form battery B3.

[0045] The following describes the performance of the battery provided by the present invention.

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

[0047] ...

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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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