A kind of active metal composite sheet and its preparation method and application
A technology of active metals and thin sheets, applied in the direction of active material electrodes, alkaline storage batteries, alkaline storage battery electrodes, etc., can solve the problems of battery performance degradation, hidden safety hazards, etc., and achieve control of metal volume expansion, long life, safety, and activity The effect of high metal content
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[0049] The invention provides a method for preparing the above-mentioned active metal composite sheet, comprising the following steps:
[0050] 1) Under the condition of an inert atmosphere, the active metal is heated and heated until the active metal melts into a liquid state;
[0051] 2) Enter the ribbon-shaped composite component into the liquid active metal at a rate of 0.1-100cm / s, and then leave the ribbon-shaped composite component from the surface of the liquid active metal at a rate of 0.1-100cm / s after 0.1-2min for 1-600S Finally, the liquid active metal dipped on the surface of the composite component solidifies to form a coating, forming a strip-shaped active metal composite material;
[0052] 4) One end of this composite metal strip is fixed on the winding shaft, and is wound in a plane perpendicular to the winding shaft by the winding shaft at a speed of 400-1000r / min, so as to obtain Rectangular metallic zinc / copper composite sheet with a wound structure.
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Embodiment 1
[0061] This embodiment provides a method for preparing an active metal composite sheet. The active metal is selected as lithium metal, and the composite component is a copper strip. The thickness of the copper strip is 25 microns, and the width is 200 microns. The selected winding shaft is circular winding shaft; the preparation method comprises the following steps:
[0062] 1) Under an atmosphere of argon (99.9% pure), put the metal lithium block into the container, and heat it to 450-500°C until the metal lithium melts into a liquid state;
[0063] 2) Pull the copper strip into the melted liquid lithium metal by slowly pulling it at a rate of 0.1-50 cm / s, and continue pulling and pulling at a rate of 0.1-50 cm / s after 1 minute to make the copper strip leave the surface of the liquid metal lithium, After the copper strip leaves the surface of the liquid metal lithium, it enters the cooling environment, and the temperature of the cooling environment is controlled to be 10°C. A...
Embodiment 2
[0073] This embodiment provides a preparation method of an active metal composite sheet. The active metal is selected as lithium metal, and the composite component is a copper strip. The thickness of the copper strip is 6 microns and the width is 100 microns. The selected winding shaft is a square roll around the shaft; the preparation method comprises the following steps:
[0074] 1) Under an atmosphere of argon (99.99% pure), put the metal lithium block into the container, and heat it to 500-600°C until the metal lithium melts into a liquid state;
[0075] 2) Pull the copper strip into the melted liquid lithium metal by slowly pulling it at a rate of 0.1-50 cm / s, and continue pulling and pulling at a rate of 0.1-50 cm / s after 1 minute to make the copper strip leave the surface of the liquid metal lithium, After the copper strip leaves the surface of the liquid metal lithium, it enters the cooling environment, and the temperature of the cooling environment is controlled to be...
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Abstract
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