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Zinc alloy powder for alkaline battery

A technology of alkaline batteries and zinc alloys, applied in battery electrodes, circuits, electrical components, etc., can solve the problem that the volume of hydrogen cannot be reduced at the same time, and achieve the effect of small hydrogen volume

Inactive Publication Date: 2014-05-21
吴雅萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current technology reduces the volume of hydrogen gas produced before battery discharge by adding additives, but the problem is that it cannot reduce the volume of hydrogen gas produced before and after battery discharge at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] The preparation method of described zinc alloy powder is:

[0015] Ingredients, the composition by weight percentage is 0.0003-0.0005% indium, 0.1-0.2% magnesium, 0.03-0.15% calcium, 0.01-0.015% iron, 0.0002-0.0005% strontium, 0.05-0.35% aluminum-free, 0.08-0.1% bismuth, the balance is mixed with zinc and unavoidable impurities, and passed through nitrogen to melt to obtain molten zinc alloy, spray the zinc alloy into the air, and pulverize by gas pulverization method;

[0016] Then, the zinc alloy powder obtained above is heat-treated in a heat treatment furnace for 25 minutes at a temperature of 350° C. under a nitrogen atmosphere, and then cooled to room temperature at a uniform speed in a nitrogen atmosphere at a cooling rate of 5-15° C. / second.

Embodiment 1

[0018] A zinc alloy powder for alkaline batteries, the composition of which is, by weight percentage, 0.0005% indium, 0.2% magnesium, 0.15% calcium, 0.015% iron, 0.0005% strontium, 0.35% aluminum-free, 0.1% bismuth , and the balance is zinc and unavoidable impurities.

Embodiment 2

[0020] A zinc alloy powder for alkaline batteries, the composition of which is by weight percentage: 0.00035% indium, 0.1% magnesium, 0.03% calcium, 0.01% iron, 0.00035% strontium, 0.05% aluminum-free, 0.08% bismuth , and the balance is zinc and unavoidable impurities.

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PUM

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Abstract

The invention relates to zinc alloy powder for an alkaline battery. The zinc alloy powder is characterized by containing the following ingredients in percentage by weight: 0.0003-0.0005% of indium, 0.1-0.2% of magnesium, 0.03-0.15% calcium, 0.01-0.015% of iron, 0.0002-0.0005% of strontium, 0.05-0.35% of aluminum, 0.08-0.1% of bismuth and the balance of zinc and unavoidable impurities. When the zinc alloy powder disclosed by the invention is used as a negative active material, the volume of hydrogen gas generated before the discharge of the battery is very small, and the volume of hydrogen gas generated after the discharge of the battery is also very small.

Description

technical field [0001] The invention belongs to the field of metal alloys, in particular to a zinc alloy powder for alkaline batteries. Background technique [0002] The active material currently used for the negative electrode of the battery is mainly zinc powder. However, if zinc is used alone as the active material of the negative electrode of the battery, there is a problem that a large amount of hydrogen gas is generated during the use of the battery, thus electrolyte leakage occurs. [0003] In order to solve the above problems, zinc, which is an active material of the negative electrode of batteries, has been amalgamated with mercury for a long time, however, when waste batteries are discarded, the mercury therein causes environmental pollution problems. [0004] The prior art proposes the use of mercury-free zinc powder, using zinc alloy powder obtained by alloying zinc with other elements such as bismuth, aluminum, indium, gallium, thallium, magnesium, calcium, stro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38C22C18/00C22C18/04
CPCB22F1/0003B22F2301/052B22F2301/056B22F2301/058B22F2301/30B22F2301/35B22F2303/01C22C18/00C22C18/04H01M4/42H01M4/463H01M4/466Y02E60/10
Inventor 吴雅萍
Owner 吴雅萍