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A kind of cheap zinc-silver battery pole plate and preparation method thereof

A zinc-silver battery and electrode plate technology, applied in the electrode of primary battery, electrode of alkaline battery, etc., can solve the problems of inability to compete with lithium-ion battery, increase battery cost, slow progress, etc., achieve good conductivity and improve energy density , the effect of low cost

Inactive Publication Date: 2016-11-23
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As mentioned earlier, although zinc-silver batteries have excellent performance compared to other types of batteries, the defect of high cost limits their application in the civilian field, such as: the work of Zpower in the United States has been promoting the zinc-silver battery system for notebook computers , but progress is slow and cannot compete with low-cost, high-performance lithium-ion batteries
[0005] The key to reducing the cost of zinc-silver batteries is to reduce the cost of the electrode plates. The plates of traditional zinc-silver batteries are all based on high-purity silver mesh, on which highly active silver oxide powder or zinc powder is attached to prepare positive or negative plates. Extensive use of silver nets seriously increases battery costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of the low-cost zinc-silver battery pole plate includes foam metal treatment, active slurry configuration, active material coating, drying, rolling and other processes. The metal foam needs to be rolled to adjust its thickness before use, and to be ultrasonically cleaned with solvents such as deionized water, ethanol, and acetone. For the active material slurry, the binder is completely dissolved in the solvent first, and then the uniformly mixed active material, conductive electrode, solvent and other materials are added. The mixing method of the slurry adopts one or more of mechanical stirring, ball mill stirring and ultrasonic treatment. The coating active material includes dip coating, roll coating, spray coating, blade coating, etc., which can make the paste material adhere to the surface and inside of the porous material.

[0033] In the present invention, unless otherwise specified, the percentages involved are all mass percentages.

Embodiment 1

[0036] Set the gram weight to 280g / m 2 The nickel foam was adjusted to a thickness of 250 μm by rolling, soaked in absolute ethanol for 1 hour, and dried for later use.

[0037] To prepare the positive electrode plate of zinc-silver battery, configure N-methylpyrrolidone: silver oxide powder: acetylene black: polyvinylidene fluoride = 5: 0.8: 0.1: 0.1 positive electrode active material slurry according to the mass ratio, and mechanically stir for 5 hours to ensure that the slurry is evenly mixed . The active material was coated in the nickel foam skeleton by a roller coating process and dried at 120 °C for 12 h. Finally, adjust the plate thickness to 100 μm by rolling under 100 MPa.

[0038] Prepare zinc-silver battery negative plate, configure N-methylpyrrolidone: zinc powder: acetylene black: polyvinylidene fluoride: mercuric oxide = 5: 0.8: 0.15: 0.1: 0.02 negative electrode active material slurry in mass ratio, mercuric oxide It acts as a hydrogen suppressant, and the b...

Embodiment 2

[0041] Set the gram weight to 420g / m 2 The nickel foam was adjusted to a thickness of 350 μm by rolling, soaked in acetone for 1 hour, and dried for later use.

[0042]To prepare the positive electrode plate of the zinc-silver battery, configure the positive electrode active material slurry according to the mass ratio of water: silver oxide powder: graphite: polyvinyl alcohol = 5: 1.2: 0.15: 0.1, and mechanically stir for 5 hours to ensure that the slurry is evenly mixed. The active material was coated in the nickel foam skeleton by knife coating process and dried at 100 °C for 6 h. Finally, adjust the plate thickness to 120 μm by rolling under 100 MPa.

[0043] To prepare the negative electrode plate of zinc-silver battery, configure water: zinc powder: acetylene black: polyvinyl alcohol: mercury oxide = 5: 1.5: 0.1: 0.2: 0.03 negative electrode active material slurry according to the mass ratio, and ball mill and stir for 3 hours to ensure that the slurry is evenly mixed ....

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Abstract

The invention relates to the field of preparation of zinc-silver battery polar plates, and particularly relates to a cheap zinc-silver battery polar plate and a preparation method thereof. The zinc-silver battery polar plate is composed of a foam metal skeleton and an active material coating. The foam metal skeleton has a three-dimensional pore structure, good conductivity and oxidation resistance, thereby meeting rigid requirements of the battery polar plate. A slurry formed by mixing the active material, an adhesive, a conductive agent and a solvent coats the surface and internal of the foam metal; and the battery polar plate with a certain thickness and density is obtained by drying and rolling. The foam metal is used to replace a conventional silver skeleton, so that the battery active material can be effectively prevented from falling off; manufacturing cost of electrodes can be reduced; thinner polar plate can be prepared; and energy density of the battery is increased. The preparation method of the cheap zinc-silver battery polar plate is simple in process, and can be produced in large scale and large size.

Description

technical field [0001] The invention relates to the field of preparation of zinc-silver battery pole plates, in particular to a cheap zinc-silver battery pole plate and a preparation method thereof. Background technique [0002] Zinc-silver battery is a practical high specific energy and high specific power battery developed in the 1940s. It is widely used in military equipment such as missiles, rockets, torpedoes, and satellites. It is rarely used in civilian applications, mainly in Photojournalism, electronic watches, hearing aids and pacemakers. [0003] Zinc-silver single battery is composed of plate group, single case, cell cover, pole, gas plug, etc. The plate group includes three parts: positive plate, negative plate and separator. The performance of the whole battery is determined by the above three parts. Material decision. Among them, the positive and negative plates have a key influence on the energy density, discharge performance and manufacturing cost of the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/24H01M4/30H01M4/26
CPCH01M4/06H01M4/08
Inventor 肖伟赵丽娜刘建国严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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