Nickel oxyhydroxide, manufacturing method therefor, and alkaline primary battery

A nickel oxyhydroxide, nickel hydroxide technology, applied in nickel oxide/nickel hydroxide, alkaline storage battery electrodes, electrodes of primary batteries, etc., can solve problems such as difficulties and oxidation difficulties, and achieve the effect of improving pulse discharge performance

Inactive Publication Date: 2007-06-20
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is very difficult to apply this nickel hydroxide in alkaline storage batteries
[0004] Also in alkaline primary batteries, when the crystallinity of nickel hydroxide, the starting material of nickel oxyhydroxide, is quite high, it is very difficult to oxidize with the aid of an oxidizing agent.

Method used

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  • Nickel oxyhydroxide, manufacturing method therefor, and alkaline primary battery
  • Nickel oxyhydroxide, manufacturing method therefor, and alkaline primary battery
  • Nickel oxyhydroxide, manufacturing method therefor, and alkaline primary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] (1) Synthesis of nickel hydroxide

[0104] A 2L aqueous solution containing 2mol / L ammonia and 0.05mol / L ammonium sulfate was put into a reaction vessel (2L) with a stirring blade, an oxygen nozzle, a pH electrode, a voltage test electrode, and a thermometer. Add 25% by weight of ammonia water and stir appropriately so that the pH value of the aqueous solution is maintained at 10.5, and the temperature under ambient pressure is maintained at 50°C. A linear nickel powder obtained by pyrolysis of nickel carbonyl (255 type: manufactured by INCO) was added to the aqueous solution in an amount of 250 g to obtain a suspension. In this step, nickel is activated. From the moment when the oxidation-reduction potential of the above suspension reached about -600 mV (compared to SCE), oxygen (50 mL / min) was supplied from the oxygen nozzle. Oxygen supply was performed for 15 hours to obtain a slurry containing nickel hydroxide. Use a magnet to remove unreacted metallic nickel powder fro...

Embodiment 2

[0138] The crystallinity, average particle size and metallic nickel content of nickel oxyhydroxide were evaluated.

[0139] The nickel hydroxide "a" prepared in Example 1 in an amount of 5 kg was put into a 0.1 mol / L sodium hydroxide aqueous solution in an amount of 20 L. 1.5 equivalents of sodium hypochlorite aqueous solution (concentration of available chlorine: 10% by weight) as an oxidizing agent was added and stirred to be converted into nickel oxyhydroxide. At this time, the reaction environment temperature was set to 50°C, and the treatment time after the sodium hypochlorite aqueous solution was put in was set to 6 hours. The obtained particles were thoroughly washed with water and filtered, and they were used as nickel oxyhydroxide slurry A1. The nickel oxyhydroxide paste A1 is a product of substantially the same magnification as the nickel oxyhydroxide A prepared in Example 1.

[0140] 5 kg of nickel hydroxide "a" was put into 20L of 1mol / L sodium hydroxide aqueous soluti...

Embodiment 3

[0154] When nickel oxyhydroxide is a solid solution containing metal elements (such as cobalt and manganese), examples are introduced to observe the effect.

[0155] A solid solution nickel hydroxide c1 containing cobalt was obtained in the same manner as in Example 1, except that metal cobalt powder was added when the nickel powder was added. The amount added is set so that the content of cobalt is 0.05 mol% with respect to the total amount of metal elements contained in nickel hydroxide. Similarly, except for adding cobalt so that the cobalt content relative to the total amount of metal elements contained in nickel hydroxide is 0.1 mol%, 1 mol%, 3 mol%, 7 mol%, 10 mol%, and 12 mol% , The nickel hydroxide c2 to c7 were obtained in the same manner as above.

[0156] Also, except for using metal manganese powder (a reagent produced by Sigma-Aldrich) instead of metal cobalt powder, nickel hydroxide d1 to d7 were prepared in the same manner as above, that is, containing manganese and...

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Abstract

A nickel oxyhydroxide having a beta-type structure is used to greatly improve low-temperature discharge performance and pulse discharge performance under high-load of an alkaline primary battery including a positive electrode containing nickel oxyhydroxide. In the nickel oxyhydroxide having beta-type structure, a half-width of a peak of the (001) plane is 0.2 to 0.49 DEG in a powder X-ray diffraction, an average particle size (D50) based on the secondary particle volume is 5 to 10 mum, and an average valence of nickel is 2.9 to 3.0.

Description

Technical field [0001] The present invention relates to a method for preparing nickel oxyhydroxide, nickel oxyhydroxide, and an alkaline primary battery (such as a nickel dry battery) having a positive electrode containing the nickel oxyhydroxide. Background technique [0002] The alkaline dry (primary) battery has such a structure from the inside to the outside: in the positive case that also serves as the positive terminal, the cylindrical manganese dioxide positive electrode mixture sheet and the positive electrode case are placed in close contact, and the cylindrical positive electrode mixture is placed in close contact with the positive electrode case. In the cavity of the sheet, a colloidal zinc negative electrode is placed, and the separator is sandwiched between the two. With the popularization of digital devices nowadays, the electrical load of the devices using the above-mentioned battery is gradually increasing. Thus, a battery with excellent discharge performance unde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/02C01G53/04H01M4/52H01M4/06H01M4/02H01M6/06C01B15/055H01M6/08
CPCH01M2004/021H01M4/46H01M4/38Y02E60/124C01P2006/12C01P2002/72H01M4/32C01P2004/61C01P2006/40H01M2004/028C01G53/04H01M4/02H01M4/28H01M6/08Y02E60/10
Inventor 加藤文生生驹宗久
Owner PANASONIC CORP
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