CN115275198A - Low molecular weight sodium polyacrylate binder alkaline manganese battery cathode and preparation method thereof - Google Patents
Low molecular weight sodium polyacrylate binder alkaline manganese battery cathode and preparation method thereof Download PDFInfo
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- CN115275198A CN115275198A CN202210859103.8A CN202210859103A CN115275198A CN 115275198 A CN115275198 A CN 115275198A CN 202210859103 A CN202210859103 A CN 202210859103A CN 115275198 A CN115275198 A CN 115275198A
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- molecular weight
- sodium polyacrylate
- alkaline manganese
- paana
- low molecular
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention belongs to the field of battery preparation, and particularly relates to a low molecular weight sodium polyacrylate binder alkaline manganese battery cathode and a preparation method thereof, wherein the cathode of the alkaline manganese battery is mainly made of a zinc paste, the zinc paste is prepared from zinc powder, electrolyte, polyacrylic acid cross-linked resin and low molecular weight sodium polyacrylate (PAANa-L), and the preparation method comprises the following steps: (1) Mixing 100g of zinc powder and 0.1-1g of polyacrylic acid cross-linked resin, and uniformly stirring; (2) Adding 0.1-1g of sodium polyacrylate into the mixture in the step (1) and continuously stirring fully; (3) And (3) adding the mixed materials in the step (2) into 40-60 g of electrolyte, continuously stirring, and defoaming along with negative pressure to form qualified calamine cream. The invention selects PAANa with low molecular weight, fundamentally solves the problem of product wire drawing, and is matched with polyacrylate products with high viscosity, thereby ensuring the viscosity of the product and having stable diffusion effect.
Description
Technical Field
The invention belongs to the field of battery preparation, and particularly relates to a low-molecular-weight sodium polyacrylate binder alkaline manganese battery cathode and a preparation method thereof.
Background
Sodium polyacrylate (PAANa) is a novel functional polymer electrolyte, and the application of PAANa is greatly related to the molecular weight of PAANa. The low molecular weight sodium polyacrylate (PAANa-L) is mainly used as a dispersing agent, a water treatment agent and the like of the pigment, and the medium molecular weight sodium polyacrylate (PAANa-M) is mainly used as a thickening agent, a viscosity stabilizing agent, a water-retaining agent and the like; the higher molecular weight sodium polyacrylate (PAANa-DK) is mainly used as flocculant, thickener, etc.
In the alkaline manganese battery industry, the PAANa also plays a role in thickening and bonding, the applied PAANa are large-molecular-weight products, so that the products have the functions of thickening, bonding and frame stabilizing, but the large-molecular-weight PAANa generally has large viscosity, and simultaneously can cause a thickening object to be accompanied with a wire drawing phenomenon, and the wire drawing phenomenon is more serious along with the larger molecular weight and the larger viscosity of the products, so that the application range of the large-molecular-weight PAANa is limited to a certain extent.
Disclosure of Invention
In order to solve the wire drawing problem of the sodium polyacrylate used in the alkaline manganese battery, the invention selects PAANa with low molecular weight to fundamentally solve the wire drawing problem of the product, and simultaneously, the invention is matched with polyacrylate products with high viscosity to ensure the viscosity of the product and have the effect of stable diffusion.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the negative electrode of the alkaline manganese battery is mainly made of zinc paste, and is characterized in that the zinc paste is prepared from zinc powder, electrolyte, polyacrylic acid cross-linked resin and low molecular weight sodium polyacrylate (PAANa-L).
Furthermore, the formula of the zinc paste comprises 100 parts of zinc powder, 40-60 parts of electrolyte, 0.1-1 part of polyacrylic acid cross-linked resin and 0.1-1 part of PAANa-L.
Further, the concentration of the electrolyte is 20% -40%, and the molecular weight of the PAANa-L is 5 x 103-5*104g/mol。
Further, the preparation method of the low molecular weight sodium polyacrylate binder alkaline manganese battery negative electrode comprises the following steps:
(1) Mixing 100g of zinc powder and 0.1-1g of polyacrylic acid cross-linked resin, and uniformly stirring;
(2) Adding 0.1-1g of sodium polyacrylate into the mixture in the step (1) and continuously stirring fully;
(3) And (3) adding the mixed materials in the step (2) into 40-60 g of electrolyte, continuously stirring, and defoaming along with negative pressure to form qualified calamine cream.
Further, the pressure of the negative pressure defoaming is 45-55 KPa.
The invention has the beneficial effects that:
in the prior art, the calamine cream binder adopts high molecular weight sodium polyacrylate with the molecular weight of 106-107g/mol, and has wire drawing phenomenon in the using process; the invention researches a cathode zinc paste binder of an alkaline manganese battery by using low molecular weight sodium polyacrylate (PAANa-L) with the molecular weight of 5 x 103-5*104Avoiding wire drawing; and the structure of the zinc paste is stabilized by adding polyacrylic acid cross-linked resin.
Detailed Description
In order to enhance the understanding of those skilled in the art, the present invention will be further described in conjunction with the specific embodiments.
Example 1
The low molecular weight sodium polyacrylate binder alkaline manganese battery negative electrode and the preparation method thereof are characterized in that the zinc paste is prepared from zinc powder, electrolyte, polyacrylic acid cross-linked resin and low molecular weight sodium polyacrylate (PAANa-L).
Furthermore, the formula of the zinc paste comprises 100 parts of zinc powder, 40-60 parts of electrolyte, 0.1-1 part of polyacrylic acid cross-linked resin and 0.1-1 part of PAANa-L.
Further, the concentration of the electrolyte is 20% -40%, and the molecular weight of the PAANa-L is 5 x 103-5*104g/mol。
The preparation method of the low molecular weight sodium polyacrylate binder alkaline manganese battery cathode comprises the following steps:
(1) Mixing 100g of zinc powder and 0.3g of polyacrylic acid cross-linked resin, and uniformly stirring;
(2) Adding 0.6g of sodium polyacrylate with the molecular weight of 40000g/mol into the mixture in the step (1) and continuously stirring the mixture fully;
(3) And (3) adding the mixed material in the step (2) into 55g of 30% electrolyte, continuously stirring, and defoaming along with negative pressure to form qualified calamine cream, wherein the calamine cream has no wire drawing phenomenon.
Example 2
The preparation method of the low molecular weight sodium polyacrylate binder alkaline manganese battery cathode comprises the following steps:
(1) Mixing 100g of zinc powder and 0.3g of polyacrylic acid cross-linked resin and uniformly stirring;
(2) Adding 0.6g of sodium polyacrylate with molecular weight of 6000g/mol into the mixture in the step (1) and continuously stirring fully;
(3) And (3) adding the mixed material in the step (2) into 55g of 30% electrolyte, continuously stirring, and forming qualified calamine cream along with negative pressure defoaming, wherein the calamine cream has no wire drawing phenomenon.
Example 3
The preparation method of the low molecular weight sodium polyacrylate binder alkaline manganese battery cathode comprises the following steps:
(1) Mixing 100g of zinc powder and 0.3g of polyacrylic acid cross-linked resin, and uniformly stirring;
(2) Adding 0.6g of sodium polyacrylate with the molecular weight of 4000g/mol into the mixture in the step (1) and continuously stirring the mixture fully;
(3) And (3) adding the mixed material in the step (2) into 55g of 30% electrolyte, continuously stirring, and defoaming along with negative pressure to form qualified calamine cream, wherein the viscosity of the calamine cream is low, and the stability of the calamine cream is poor.
Example 4
The preparation method of the low molecular weight sodium polyacrylate binder alkaline manganese battery cathode comprises the following steps:
(1) Mixing 100g of zinc powder and 0.3g of polyacrylic acid cross-linked resin, and uniformly stirring;
(2) Adding 0.6g of sodium polyacrylate with the molecular weight of 48000g/mol into the mixture in the step (1) and continuously stirring the mixture fully;
(3) And (3) adding the mixed material in the step (2) into 55g of 30% electrolyte, continuously stirring, and forming qualified calamine cream along with negative pressure defoaming, wherein the calamine cream has no wire drawing and is stable in structure.
Example 5
The preparation method of the high molecular weight sodium polyacrylate (PAANa-DK) binder alkaline manganese battery negative electrode comprises the following steps:
(1) Mixing 100g of zinc powder and 0.3g of polyacrylic acid cross-linked resin, and uniformly stirring;
(2) Adding 0.6g of sodium polyacrylate with the molecular weight of 60000g/mol into the mixture in the step (1), and continuously and fully stirring;
(3) And (3) adding the mixed material in the step (2) into 55g of 30% electrolyte, continuously stirring, and defoaming along with negative pressure to form qualified calamine cream, wherein the calamine cream has a wire drawing phenomenon.
The calamine cream prepared in example 1 and the calamine cream prepared in example 5 were injected into the present shop semi-finished battery, respectively, and observed between 1.5w/0.65w, between 1000mA and 250mA, and between 3.9 Ω continuous and intermittent, and their new electricity and the stored discharge data are shown in table 1 below.
TABLE 1 comparison of the discharge performance of the PAANa-L calamine in example 1 and the PAANa-DK calamine in example 5 cells
From the data in the table above, it can be seen that the discharge performance of the existing high molecular weight PAANa-DK workshop cell is compared with that of the low molecular weight PAANa-L, and the discharge performance of the low molecular weight PAANa-L is higher than that of the high molecular weight PAANa-DK and the storage rate of the PAANa-L is higher than that of the high molecular weight PAANa-DK under the discharge of 1.5w/0.65w of large current, no matter new electricity, high-temperature storage or room-temperature storage. The battery discharge performance of the PAANa-L with low molecular weight is higher than that of the existing PAANa-DK in different degrees under the discharge of other items, and the gas evolution volume after discharge is not large.
The above test results show that low molecular weight PAANa-L can also be used as a calamine paste binder in alkaline zinc-manganese batteries.
Claims (6)
1. The low molecular weight sodium polyacrylate binder alkaline manganese battery negative electrode and the preparation method thereof are characterized in that the zinc paste is prepared from zinc powder, electrolyte, polyacrylic acid cross-linked resin and low molecular weight sodium polyacrylate (PAANa-L).
2. The alkaline manganese cell cathode of claim 1, wherein said zinc paste is formulated with 100 parts zinc powder, 40-60 parts electrolyte, 0.1-1 part polyacrylic acid cross-linked resin, 0.1-1 part PAANa-L.
3. The alkaline manganese cell negative electrode of claim 2, wherein said electrolyte concentration is 20% to 40%.
4. The alkaline manganese cell negative electrode of claim 2, wherein said PAANa-L has a molecular weight of 5 x 103-5*104g/mol。
5. The method for preparing the negative electrode of the alkaline manganese cell according to claim 1, comprising the steps of:
(1) Mixing 100g of zinc powder and 0.1-1g of polyacrylic acid cross-linked resin, and uniformly stirring;
(2) Adding 0.1-1g of sodium polyacrylate into the mixture in the step (1) and continuously stirring fully;
(3) And (3) adding the mixed materials in the step (2) into 40-60 g of electrolyte, continuously stirring, and defoaming along with negative pressure to form qualified calamine cream.
6. The method for preparing the negative electrode of the alkaline manganese battery according to claim 5, wherein the pressure for negative pressure defoaming is 45 to 55Kpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210859103.8A CN115275198A (en) | 2022-07-20 | 2022-07-20 | Low molecular weight sodium polyacrylate binder alkaline manganese battery cathode and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210859103.8A CN115275198A (en) | 2022-07-20 | 2022-07-20 | Low molecular weight sodium polyacrylate binder alkaline manganese battery cathode and preparation method thereof |
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| CN115275198A true CN115275198A (en) | 2022-11-01 |
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| CN202210859103.8A Pending CN115275198A (en) | 2022-07-20 | 2022-07-20 | Low molecular weight sodium polyacrylate binder alkaline manganese battery cathode and preparation method thereof |
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2022
- 2022-07-20 CN CN202210859103.8A patent/CN115275198A/en active Pending
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