CN103695714A - Preparation method of zinc paste of alkaline zinc-manganese battery - Google Patents
Preparation method of zinc paste of alkaline zinc-manganese battery Download PDFInfo
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- CN103695714A CN103695714A CN201310676722.4A CN201310676722A CN103695714A CN 103695714 A CN103695714 A CN 103695714A CN 201310676722 A CN201310676722 A CN 201310676722A CN 103695714 A CN103695714 A CN 103695714A
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Abstract
The invention discloses a method for preparing zinc paste of an alkaline zinc-manganese dioxide battery, which comprises the following steps: (1) Putting aluminum, bismuth and rare earth metal into a pressure melter, heating to a molten state, pressing into zinc liquid to generate zinc alloy, and crushing to prepare zinc alloy particles; (2) Mixing the zinc alloy particles with polyacrylic acid or methacrylic acid, polyacrylate or methacrylate and indium oxide powder, and grinding into a zinc powder mixture with the particle size of 50-100 microns; (3) And (2) putting the zinc powder mixture and the electrolyte prepared in advance into a mixing reaction container according to the volume ratio of 1. The zinc paste for the alkaline zinc-manganese dioxide battery prepared by the preparation method provided by the invention has the advantages that the discharge capacity is greatly improved, the service life is effectively prolonged, and the zinc paste is lead-free and mercury-free and is more environment-friendly.
Description
Technical Field
The invention relates to the field of alkaline zinc-manganese dioxide battery preparation, in particular to a preparation method of a zinc paste of an alkaline zinc-manganese dioxide battery which has strong discharge capacity, long service life and no lead or mercury.
Background
Alkaline zinc-manganese batteries are the most widely used commercial battery products to date. With the popularization of digital technology, the functions of small-sized electric appliances are increasing day by day, and the requirement on high-power discharge of alkaline batteries is higher and higher. The zinc paste is used as an important component material for preparing the alkaline zinc-manganese battery, and the performance of the zinc paste plays a key role in the discharge capacity and the service life of the alkaline battery. In addition, most of the zinc pastes of the current alkaline zinc-manganese dioxide batteries contain mercury and lead, so that the discarded batteries have adverse effects on the environment.
It is therefore highly desirable to provide a lead-free and mercury-free zinc paste for alkaline batteries that has a high discharge capacity and a long service life.
Disclosure of Invention
The invention aims to provide a method for preparing zinc paste for an alkaline zinc-manganese dioxide battery, which is used for preparing the zinc paste for the alkaline zinc-manganese dioxide battery, which has strong discharge capacity, long service life and no lead or mercury.
In order to achieve the aim, the invention provides a method for preparing zinc paste of an alkaline zinc-manganese dioxide battery, which comprises the following steps:
(1) Putting aluminum, bismuth and rare earth metal into a pressure melter, heating to a molten state, pressing into zinc liquid to generate zinc alloy, crushing to prepare zinc alloy particles, wherein the mass fraction of the aluminum is 20-30ppm, the mass fraction of the bismuth is 20-70ppm, the mass fraction of the rare earth metal is 200-300ppm, and the balance is the zinc liquid; (2) Mixing the zinc alloy particles with polyacrylic acid or methacrylic acid, polyacrylate or methacrylate and indium oxide powder, and grinding the mixture into a zinc powder mixture with the particle size of 50-100 microns, wherein the mass part ratio of the zinc alloy particles is 80-90, the mass part ratio of the polyacrylic acid or the methacrylic acid is 0.5-1, the mass part ratio of the polyacrylate or the methacrylate is 1-2, the mass part ratio of the polyacrylate or the methacrylate is 0.2-0.5, and the mass part ratio of the indium oxide powder is 1-1.5; (3) Putting the zinc powder mixture and a prepared electrolyte into a mixing reaction container according to a volume ratio of 1: 10-15:35-50 parts by mass.
Wherein the rare earth metal consists of lanthanum, yttrium and cerium.
Preferably, the mass ratio of lanthanum to yttrium to cerium in the rare earth metal is 2: 1.
Wherein the polyacrylate is sodium polyacrylate.
Wherein the methyl polyacrylate is sodium methyl polyacrylate.
The zinc paste for the alkaline zinc-manganese dioxide battery prepared by the preparation method is tried by battery manufacturers, compared with other zinc paste materials in the market, the discharge capacity is greatly improved, the service life is effectively prolonged, and the zinc paste is lead-free and mercury-free and is more environment-friendly.
Detailed Description
The preparation method of the zinc paste for alkaline zinc-manganese dioxide batteries provided by the invention is described in detail by combining the examples.
Example one
Preparation of Zinc alloy particles
Putting the tiny scrap-shaped aluminum, bismuth and rare earth metal into a pressure melting device, heating to be molten, pressing into zinc liquid to directly generate zinc alloy, and crushing to prepare zinc alloy particles. The prepared zinc alloy particles are lead-free and mercury-free. In this example, the raw material of the zinc alloy was prepared in the following mass fractions, aluminum 20ppm by mass, bismuth 20ppm by mass, rare earth metal 200ppm by mass, and the balance zinc liquid. The rare earth metal consists of lanthanum, yttrium and cerium, and the mass ratio of lanthanum to yttrium to cerium is 2: 1.
Preparing a mixture of zinc powders
Mixing the prepared zinc alloy particles with polyacrylic acid, polyacrylate and indium oxide powder, and grinding into a zinc powder mixture with the particle size of 50 microns. In this example, sodium polyacrylate powder was used as the polyacrylate. The zinc alloy particles are 80 parts by mass, the polyacrylic acid is 0.5 part by mass, the polyacrylate is 1 part by mass, the sodium polyacrylate powder is 0.2 part by mass, and the indium oxide powder is 1 part by mass.
Preparation of calamine cream
The ground zinc powder mixture and the electrolyte prepared in advance are put into a mixing reaction container according to the volume ratio of 1. Wherein the electrolyte is prepared from potassium hydroxide, zinc oxide and pure water according to the weight ratio of 40:10:50 parts by mass.
Example two
Preparation of Zinc alloy particles
Putting the tiny scrap-shaped aluminum, bismuth and rare earth metal into a pressure melting device, heating to be molten, pressing into zinc liquid to directly generate zinc alloy, and crushing to prepare zinc alloy particles. The prepared zinc alloy particles are lead-free and mercury-free. In this example, the raw material of the zinc alloy was prepared in the following mass fractions, aluminum 30ppm by mass, bismuth 70ppm by mass, rare earth 300ppm by mass, and the balance zinc liquid. The rare earth metal consists of lanthanum, yttrium and cerium, and the mass ratio of lanthanum to yttrium to cerium is 2: 1.
Preparing a mixture of zinc powders
Mixing the prepared zinc alloy particles with methacrylic acid, methacrylate and indium oxide powder, and grinding into a zinc powder mixture with the particle size of 100 microns. In this example, sodium methacrylate powder was used as the methacrylate. The zinc alloy particles are 90 parts by mass, the methacrylic acid is 1 part by mass, the methacrylate is 2 parts by mass, the sodium methacrylate powder is 0.5 part by mass, and the indium oxide powder is 1.5 parts by mass.
Preparation of calamine cream
The ground zinc powder mixture and the electrolyte prepared in advance are put into a mixing reaction container according to the volume ratio of 1. Wherein the electrolyte is prepared from potassium hydroxide, zinc oxide and pure water according to the weight ratio of 50:15:35 parts by mass.
Comparative example
The zinc powder mixture was prepared by a conventional method different from examples one and two, using zinc alloy particles to which 100ppm of rare earth metals lanthanum, yttrium and cerium were added. The zinc powder mixture comprises the following components: 91-94.2 zinc alloy particles, 0.9-1.5 polyacrylic acid, 0.9-1.5 polyacrylate, and 3.5-6.5 indium hydroxide. The electrolyte comprises the following components: 50-55 parts of potassium hydroxide, 7-8 parts of zinc oxide and 37-43 parts of pure water. The other operations are the same as those of the first and second embodiments.
The performance of the zinc pastes prepared in the first and second examples and the common zinc paste prepared in the comparative example for the alkaline zinc-manganese dioxide cell was tested as follows:
the alkaline zinc-manganese dioxide battery is discharged under the condition of 25 +/-2 ℃ by a discharge system with the cut-off voltage of 1 volt, wherein the discharge system is 2 watts and 3 seconds, 500 milliwatts and 20 seconds, 10 times per hour and 24 hours per day. The discharge results are shown in Table 1.
| Comparative example | Example one | Example two | |
| Discharge result (second) | 50 | 75 | 80 |
| Discharge capacity enhancement (%) | 100 | 150 | 160 |
| Life ratio (%) | 100 | 120 | 125 |
Table 1: summary of discharge results and service life of the example and comparative batteries
As can be seen from table 1, the zinciferous pastes prepared by the preparation methods and compositions of examples one and two are greatly improved in discharge capacity and service life, and are more environment-friendly due to no lead and mercury.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and it should be noted that, for those skilled in the art, many modifications and decorations can be made without departing from the technical solution of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A preparation method of zinc paste of an alkaline zinc-manganese dioxide battery is characterized by comprising the following steps:
(1) Putting aluminum, bismuth and rare earth metal into a pressure melter, heating to a molten state, pressing into zinc liquid to generate zinc alloy, crushing to prepare zinc alloy particles, wherein the mass fraction of the aluminum is 20-30ppm, the mass fraction of the bismuth is 20-70ppm, the mass fraction of the rare earth metal is 200-300ppm, and the balance is the zinc liquid;
(2) Mixing the zinc alloy particles with polyacrylic acid or methacrylic acid, polyacrylate or methacrylate and indium oxide powder, and grinding the mixture into a zinc powder mixture with the particle size of 50-100 micrometers, wherein the mass part ratio of the zinc alloy particles is 80-90, the mass part ratio of the polyacrylic acid or the methacrylate is 0.5-1, the mass part ratio of the polyacrylate or the methacrylate is 1-2, the mass part ratio of the polyacrylate or the methacrylate is 0.2-0.5, and the mass part ratio of the indium oxide powder is 1-1.5;
(3) Putting the zinc powder mixture and a prepared electrolyte into a mixing reaction container according to a volume ratio of 1: 10-15:35-50 parts by mass.
2. The method of claim 1 wherein the rare earth metal is comprised of lanthanum, yttrium and cerium.
3. The method of claim 2, wherein the rare earth metal has a mass ratio of lanthanum, yttrium and cerium of 2: 1.
4. The process of claim 1 wherein the polyacrylate salt is sodium polyacrylate.
5. The method of claim 1, wherein the salt of methacrylic acid is sodium methacrylate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310676722.4A CN103695714A (en) | 2013-12-11 | 2013-12-11 | Preparation method of zinc paste of alkaline zinc-manganese battery |
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| CN201310676722.4A CN103695714A (en) | 2013-12-11 | 2013-12-11 | Preparation method of zinc paste of alkaline zinc-manganese battery |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832372A (en) * | 2012-08-30 | 2012-12-19 | 上海锦众信息科技有限公司 | Preparation method of battery zinc paste |
| US8343658B2 (en) * | 2009-09-07 | 2013-01-01 | Panasonic Corporation | Alkaline battery having improved high rate discharge capability |
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- 2013-12-11 CN CN201310676722.4A patent/CN103695714A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8343658B2 (en) * | 2009-09-07 | 2013-01-01 | Panasonic Corporation | Alkaline battery having improved high rate discharge capability |
| CN102832372A (en) * | 2012-08-30 | 2012-12-19 | 上海锦众信息科技有限公司 | Preparation method of battery zinc paste |
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Application publication date: 20140402 |