Water-based conductive agent for alkaline manganese battery, preparation method of water-based conductive agent and alkaline manganese battery

Abstract

The invention provides a water-based conductive agent for an alkaline manganese battery, a preparation method of the water-based conductive agent and the alkaline manganese battery, and belongs to the technical field of batteries. The water-based conductive agent comprises a water-based adhesive, an electrolyte and a carbon-based material, the water-based adhesive is obtained by polymerizing a hydrophilic monomer and an acrylic monomer, and different particle sizes of the water-based adhesive can be designed to be matched with carbon-based materials with different sizes, so that the water-based conductive agent with different use requirements is prepared. The water-based conductive agent has high surface energy and high electrolyte retention capacity, the electron transmission capacity of the conductive agent can be effectively improved, and the alkaline manganese battery prepared from the conductive agent has low discharge internal resistance and excellent discharge characteristic.

Description

Technical Field

[0001] The present invention relates to an alkaline manganese battery, and more specifically, to an aqueous conductive agent for an alkaline manganese battery, a preparation method thereof, and an alkaline manganese battery.

Background Art

[0002] Alkaline manganese batteries have the characteristics of high discharge power, long shelf life, convenient and fast use, high cost performance, etc., and have always been in a dominant position among many primary batteries. With the increasingly wide application range of alkaline manganese batteries, people have put forward higher and higher requirements for the improvement of their discharge capacity, use under high-power conditions, longer storage life, and safety. Therefore, it is necessary to optimize the materials, formulations, and structural components selected for alkaline manganese batteries to enable the electrode materials to exert their electrical properties to a greater extent. In particular, it is necessary to reduce the internal resistance of the battery and reduce the electrode passivation behavior during the discharge process of the battery.

[0003] For alkaline manganese batteries, a certain amount of conductive agent is added during the electrode manufacturing process to increase the electronic conductivity between active substances and between active substances and current collectors, ensure the formation of a conductive network on the surface of the active substances to accelerate the electron transfer rate, and enable alkaline manganese batteries to have excellent discharge characteristics and a longer storage life. However, the currently used conductive agents are basically carbon-based materials (such as conductive carbon black, ultrafine graphite powder), which have a low surface energy, strong hydrophobicity, and weak adsorption capacity for electrolytes. Therefore, to significantly improve the discharge performance of alkaline manganese batteries, it is necessary to optimize the conductive agent to make it have strong hydrophilicity to ensure that the positive electrode has good liquid absorption capacity, so that there is enough electrolyte to quickly penetrate into each part of the positive electrode during high-current discharge, enabling the electrode reaction to proceed rapidly.

Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide an aqueous conductive agent for an alkaline manganese battery, a preparation method thereof, and an alkaline manganese battery. The aqueous conductive agent has a high surface energy, strong liquid retention capacity for electrolytes, can effectively improve the electron transfer ability of the conductive agent, and the prepared alkaline manganese battery has a low discharge internal resistance and excellent discharge characteristics.

[0005] In a first aspect, to achieve the foregoing invention object, the present invention provides an aqueous conductive agent for an alkaline manganese battery, comprising an aqueous binder, an electrolyte, and a carbon-based material; the aqueous binder is obtained by polymerizing a hydrophilic monomer and an acrylic monomer in the electrolyte; the particle size of the aqueous binder has designability; the carbon-based material is uniformly dispersed in the aqueous binder.

[0006] Further, the hydrophilic monomer is selected from one or a combination of more than one of sodium methallyl hydroxypropyl sulfonate, sodium alkylamide vinyl sulfonate, sodium methallyl sulfonate, sodium tetradecene sulfonate, sodium styrene sulfonate, and sodium alkylphenol allyl polyether sulfate.

[0007] The acrylic monomer is selected from one or a combination of more than one of methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl acrylate.

[0008] The electrolyte is selected from sodium hydroxide solutions, and the mass concentration of the sodium hydroxide solution is 30% to 50%.

[0009] The carbon-based material is selected from one or a combination of more than one of conductive carbon black, conductive graphite, carbon nanotubes, graphene, and carbon fiber.

[0010] The dosage of the hydrophilic monomer accounts for a mass ratio of 10% to 40% of the dosage of the acrylic monomer.

[0011] The mass ratio of the carbon-based material to the aqueous binder is 60 to 90:10 to 40.

[0012] In a second aspect, to achieve the purpose of the foregoing invention, the present invention provides a preparation method of an aqueous conductive agent for an alkaline manganese battery, including the following steps:

[0013] S1. Add the hydrophilic monomer and the acrylic monomer into the electrolyte in a certain proportion, and stir evenly at high speed to obtain a pre-emulsion;

[0014] Add sodium persulfate into deionized water, and mix evenly to obtain an initiator solution;

[0015] S2. Add a part of the pre-emulsion into a reaction kettle, heat up to 80 °C, add the initiator solution to carry out a reaction to obtain a blue fluorescent seed emulsion;

[0016] S3. Constantly and slowly drop the remaining part of the pre-emulsion into the blue fluorescent seed emulsion, cool down after the reaction is completed and discharge to obtain an aqueous binder;

[0017] S4. Uniformly disperse the carbon-based material in the aqueous binder to obtain an aqueous conductive agent.

[0018] Further, the hydrophilic monomer is selected from one or a combination of more than one of sodium methallyl hydroxypropyl sulfonate, sodium alkylamide vinyl sulfonate, sodium methallyl sulfonate, sodium tetradecene sulfonate, sodium styrene sulfonate, and sodium alkylphenol allyl polyether sulfate;

[0019] The acrylic monomer is selected from one or a combination of more than one of methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl acrylate;

[0020] The mass ratio of the dosage of the hydrophilic group monomer to the dosage of the acrylic monomer is 10% - 40%.

[0021] The electrolyte is a sodium hydroxide solution with a mass concentration of 30% - 50%.

[0022] The carbon-based material is selected from one or a combination of conductive carbon black, conductive graphite, carbon nanotubes, graphene, and carbon fibers.

[0023] The mass ratio of the carbon-based material to the water-based binder is 60 - 90:10 - 40.

[0024] In a second aspect, to achieve the object of the foregoing invention, the present invention provides an alkaline manganese battery, which includes the water-based conductive agent described in the first aspect, or includes a water-based conductive agent prepared by the preparation method described in the second aspect.

[0025] The advantages of the present invention are as follows:

[0026] (1) In the present invention, the water-based conductive agent is obtained by compounding a water-based binder formed by polymerizing a hydrophilic group monomer and an acrylic monomer with a carbon-based material. This water-based binder has a relatively high surface energy, which can promote the water-based conductive agent to have good hydrophilicity, maintain good liquid absorption and liquid retention capacity for the electrolyte, and enable the positive electrode of the alkaline manganese battery to have a lower resistance and a faster electrode reaction rate.

[0027] (2) After the carbon-based material in the water-based conductive agent of the present invention is uniformly dispersed in the water-based binder, the water-based binder adheres to the surface of the carbon-based material. The hydrophilic groups on the outside can repel each other in the electrolyte to form a steric hindrance, which can alleviate the problem that the secondary aggregated particles are dispersed and then re-aggregated during the physical dispersion process of the carbon-based material, thereby improving the dispersion stability of the conductive agent, which has positive significance for both the manufacturing process of the battery and long-term transportation and storage.

[0028] (3) In the present invention, an acrylic monomer is selected as the comonomer of the hydrophilic group monomer. It has excellent bonding strength and good flexibility, can ensure a tight connection between the active substance and the conductive agent, and its polar large functional group molecules have good solvent resistance and can maintain the structural stability even when present in the electrolyte for a long time. When used in an alkaline manganese battery, it can ensure the long-term service life of the battery.

[0029] (4) The conductive agent prepared by the present invention is a conductive agent containing a water-based binder. When making a battery electrode, the active substance can be directly added to the conductive agent, and its solid content, viscosity and other parameters can be adjusted within a wide range according to requirements, and it can adapt to various forming processes of the electrode, making the production of the battery electrode more convenient and efficient.

Specific Embodiments

[0030] In an embodiment of the present invention, by providing an aqueous conductive agent for an alkaline manganese battery, a preparation method thereof, and an alkaline manganese battery, the aqueous conductive agent has a relatively high surface energy and a strong liquid retention ability for the electrolyte, can effectively improve the electron transport ability of the conductive agent, and the prepared alkaline manganese battery has a low discharge internal resistance and excellent discharge characteristics.

[0031] The technical solution in the embodiment of the present invention to solve the above problems has the following general idea: First, a hydrophilic monomer and an acrylic monomer are polymerized in an electrolyte, and then compounded with a carbon-based material to obtain the aqueous binder of the present invention. This aqueous binder has a relatively high surface energy, can promote the conductive agent to have good hydrophilicity, maintain good liquid absorption and liquid retention ability for the electrolyte, and enable the positive electrode of the alkaline manganese battery to have a low resistance and a fast electrode reaction rate. When compounding, the aqueous binder adheres to the surface of the carbon-based material, and the hydrophilic groups on the outside can repel each other in the electrolyte to form a steric hindrance, which can alleviate the problem that the secondary aggregated particles are dispersed and then re-aggregated during the physical dispersion process of the carbon-based material, thereby improving the dispersion stability of the conductive agent, which is of positive significance for both the manufacturing process of the battery and long-term transportation and storage. When manufacturing the battery electrode, the active substance can be directly added to the conductive agent, and parameters such as its solid content and viscosity can be adjusted within a wide range according to requirements, and it can adapt to various forming processes of the electrode, making the production of the battery electrode more convenient and efficient.

[0032] The present invention provides an aqueous conductive agent for an alkaline manganese battery, comprising an aqueous binder, an electrolyte, and a carbon-based material; the aqueous binder is obtained by polymerizing a hydrophilic monomer and an acrylic monomer in an electrolyte; the particle size of the aqueous binder has designability; the carbon-based material is uniformly dispersed in the aqueous binder.

[0033] Among them, the particle size of the aqueous binder is designed by the amount of the pre-emulsion used. The amount of the pre-emulsion is one of the important factors affecting the particle size of the aqueous binder. Generally speaking, when the amount of the pre-emulsion increases, the average particle size of the latex particles will become larger and the particle size distribution will become wider. This is because the monomers in the pre-emulsion form micelles in water. When the amount of the pre-emulsion increases, the number of micelles increases, and the polymerization reaction of the monomers occurs in more micelles, thus forming more latex particles, resulting in an increase in particle size.

[0034] Among them, the hydrophilic monomer is selected from one or a combination of more of sodium methylallyl hydroxypropyl sulfonate, sodium alkylamide vinyl sulfonate, sodium methallyl sulfonate, sodium tetradecene sulfonate, sodium styrene sulfonate, and sodium alkylphenol allyl polyether sulfate.

[0035] The acrylic monomer is selected from one or a combination of more than one of methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl acrylate.

[0036] The electrolyte is selected from sodium hydroxide solutions, and the mass concentration of the sodium hydroxide solution is 30% - 50%.

[0037] The carbon-based material is selected from one or a combination of more than one of conductive carbon black, conductive graphite, carbon nanotubes, graphene, and carbon fibers.

[0038] The dosage of the hydrophilic monomer accounts for a mass ratio of 10% - 40% of the dosage of the acrylic monomer.

[0039] The mass ratio of the carbon-based material to the water-based binder is 60 - 90:10 - 40.

[0040] The present invention also provides a preparation method of a water-based conductive agent for an alkaline manganese battery, including the following steps:

[0041] S1. Add the hydrophilic monomer and the acrylic monomer into the electrolyte in a certain proportion, and stir evenly at high speed to obtain a pre-emulsion;

[0042] Add sodium persulfate into deionized water and mix evenly to obtain an initiator solution;

[0043] S2. Add part of the pre-emulsion into a reaction kettle, heat up to 80°C, and add the initiator solution for reaction to obtain a blue fluorescent seed emulsion;

[0044] S3. Constantly and slowly drop the remaining part of the pre-emulsion into the blue fluorescent seed emulsion. After the reaction is completed (usually, the reaction is completed 1 hour after the dropping is completed and the temperature is kept constant), cool down and discharge to obtain a water-based binder;

[0045] S4. Uniformly disperse the carbon-based material in the water-based binder to obtain a water-based conductive agent.

[0046] To better understand the above technical solution, the following will describe the above technical solution in detail in combination with specific embodiments

[0047] (Note: Unless otherwise specified, the parts in the following embodiments all refer to parts by mass, and the concentrations all refer to mass concentrations; and in each of the following embodiments, when constantly and slowly dropping the remaining part of the pre-emulsion into the blue fluorescent seed emulsion, the speeds used are the same or basically the same).

[0048] Example 1

[0049] This example provides a water-based conductive agent, and the preparation method of the water-based conductive agent is as follows:

[0050] (1) Add 10 parts of sodium allyl hydroxypropyl sulfonate and 100 parts of methyl methacrylate to a sodium hydroxide electrolyte solution with a concentration of 35%, and stir evenly at high speed to obtain a pre-emulsion;

[0051] (2) Add sodium persulfate to deionized water with a mass concentration of 1%, and mix evenly to obtain an initiator solution;

[0052] (3) Add 5% of the pre-emulsion to a reaction kettle and heat up to 80 °C, then add the initiator solution to carry out the reaction to obtain a blue fluorescent seed emulsion;

[0053] (4) Continuously and uniformly add the remaining 95% of the pre-emulsion dropwise to the blue fluorescent seed emulsion in (3). After the reaction is completed, cool down and discharge to obtain an aqueous adhesive with an average particle size of 150 nm.

[0054] (5) Uniformly disperse 70 parts by mass of conductive carbon black with an average particle size of 100 nm in 30 parts by mass of the aqueous adhesive to obtain an aqueous conductive agent.

[0055] Example 2

[0056] This example provides an aqueous conductive agent, and the preparation method of the aqueous conductive agent is as follows:

[0057] (1) Add 10 parts of sodium allyl hydroxypropyl sulfonate and 100 parts of methyl methacrylate to a sodium hydroxide electrolyte solution with a concentration of 35%, and stir evenly at high speed to obtain a pre-emulsion;

[0058] (2) Add sodium persulfate to deionized water with a mass concentration of 1%, and mix evenly to obtain an initiator solution;

[0059] (3) Add 10% of the pre-emulsion to a reaction kettle and heat up to 80 °C, then add the initiator solution to carry out the reaction to obtain a blue fluorescent seed emulsion;

[0060] (4) Continuously and uniformly add the remaining 90% of the pre-emulsion dropwise to the blue fluorescent seed emulsion in (3). After the reaction is completed, cool down and discharge to obtain an aqueous adhesive with an average particle size of 200 nm.

[0061] (5) Uniformly disperse 70 parts of conductive carbon black with an average particle size of 100 nm in 30 parts of the aqueous adhesive to obtain an aqueous conductive agent.

[0062] Example 3

[0063] This example provides an aqueous conductive agent, and the preparation method of the aqueous conductive agent is as follows:

[0064] (1) Add 15 parts of sodium alkylamide vinyl sulfonate and 100 parts of methyl methacrylate to a 30% sodium hydroxide electrolyte solution, and stir evenly at high speed to obtain a pre-emulsion;

[0065] (2) Add sodium persulfate to deionized water at a mass concentration of 1%, and mix evenly to obtain an initiator solution;

[0066] (3) Add 5% of the pre-emulsion to a reaction kettle and heat up to 80 °C, then add the initiator solution to carry out the reaction to obtain a blue fluorescent seed emulsion;

[0067] (4) Drop the remaining 95% of the pre-emulsion into the blue fluorescent seed emulsion in (3) at a constant speed. After the reaction is completed, cool down and discharge to obtain an aqueous binder with an average particle size of 150 nm.

[0068] (5) Uniformly disperse 70 parts of conductive carbon black with an average particle size of 100 nm in 30 parts of the aqueous binder to obtain an aqueous conductive agent.

[0069] Example 4

[0070] This example provides an aqueous conductive agent, and the preparation method of the aqueous conductive agent is as follows:

[0071] (1) Add 10 parts of sodium methallyl sulfonate and 100 parts of methyl acrylate to a 50% sodium hydroxide electrolyte solution, and stir evenly at high speed to obtain a pre-emulsion;

[0072] (2) Add sodium persulfate to deionized water at a mass concentration of 1%, and mix evenly to obtain an initiator solution;

[0073] (3) Add 5% of the pre-emulsion to a reaction kettle and heat up to 80 °C, then add the initiator solution to carry out the reaction to obtain a blue fluorescent seed emulsion;

[0074] (4) Drop the remaining 95% of the pre-emulsion into the blue fluorescent seed emulsion in (3) at a constant speed. After the reaction is completed, cool down and discharge to obtain an aqueous binder with an average particle size of 150 nm.

[0075] (5) Uniformly disperse 60 parts of conductive carbon black with an average particle size of 100 nm in 40 parts of the aqueous binder to obtain an aqueous conductive agent.

[0076] Example 5

[0077] This example provides an aqueous conductive agent, and the preparation method of the aqueous conductive agent is as follows:

[0078] (1) Add 10 parts of sodium allyl hydroxypropyl sulfonate, 10 parts of sodium methallyl sulfonate, and 100 parts of methyl methacrylate to a sodium hydroxide electrolyte solution with a concentration of 35%, and stir at high speed until evenly mixed to obtain a pre-emulsion;

[0079] (2) Add sodium persulfate to deionized water to a mass concentration of 1%, and mix evenly to obtain an initiator solution;

[0080] (3) Add 5% of the pre-emulsion to a reaction kettle, heat up to 80 °C, add the initiator solution and react to obtain a blue fluorescent seed emulsion;

[0081] (4) Drop the remaining 95% of the pre-emulsion into the blue fluorescent seed emulsion in (3) at a constant rate. After the reaction is completed, cool down and discharge to obtain an aqueous binder with an average particle size of 150 nm.

[0082] (5) Uniformly disperse 70 parts of conductive carbon black with an average particle size of 100 nm in 30 parts of the aqueous binder to obtain an aqueous conductive agent.

[0083] Example 6

[0084] This example provides an aqueous conductive agent, and the preparation method of the aqueous conductive agent is as follows:

[0085] (1) Add 40 parts of sodium allyl hydroxypropyl sulfonate, 80 parts of methyl methacrylate, and 20 parts of methyl acrylate to a sodium hydroxide electrolyte solution with a concentration of 35%, and stir at high speed until evenly mixed to obtain a pre-emulsion;

[0086] (2) Add sodium persulfate to deionized water to a mass concentration of 1%, and mix evenly to obtain an initiator solution;

[0087] (3) Add 5% of the pre-emulsion to a reaction kettle, heat up to 80 °C, add the initiator solution and react to obtain a blue fluorescent seed emulsion;

[0088] (4) Drop the remaining 95% of the pre-emulsion into the blue fluorescent seed emulsion in (3) at a constant rate. After the reaction is completed, cool down and discharge to obtain an aqueous binder with an average particle size of 150 nm.

[0089] (5) Uniformly disperse 70 parts of conductive carbon black with an average particle size of 100 nm in 30 parts of the aqueous binder to obtain an aqueous conductive agent.

[0090] Example 7

[0091] This example provides an aqueous conductive agent, and the conductive carbon black in Example 1 is replaced by carbon nanotubes.

[0092] Example 8

[0093] This embodiment provides an aqueous conductive agent, in which the amount of conductive carbon black used in Example 1 is replaced from 70 parts to 90 parts, and the aqueous binder is replaced from 30 parts to 10 parts.

[0094] Comparative Example 1

[0095] This comparative example provides a conductive agent, and the preparation method of the conductive agent is as follows:

[0096] (1) Dissolve 30 parts of polymethyl acrylate in a sodium hydroxide electrolyte solution with a concentration of 35%, and stir evenly at high speed to obtain an aqueous binder;

[0097] (2) Add 70 parts of conductive carbon black with an average particle size of 100 nm to the aqueous binder and disperse evenly to obtain a conductive agent.

[0098] Comparative Example 2

[0099] This comparative example provides a conductive agent, and the preparation method of the conductive agent is as follows:

[0100] (1) Dissolve 40 parts of polymethyl acrylate in a sodium hydroxide electrolyte solution with a concentration of 40%, and stir evenly at high speed to obtain an aqueous binder;

[0101] (2) Add 60 parts of conductive graphite with an average particle size of 500 nm to the aqueous binder and disperse evenly to obtain a conductive agent.

[0102] The aqueous conductive agents of the above Examples 1-8 and the conductive agents of Comparative Examples 1-2 were applied by a wire bar on copper foil, and then baked in an oven at 90 °C to obtain a conductive coating with a thickness of 200 μm, and the volume resistivity and water contact angle of the conductive agent were measured.

[0103] Furthermore, the aqueous conductive agents of the above Examples 1-8 and the conductive agents of Comparative Examples 1-2 were applied to the production of the positive electrode of an alkaline zinc-manganese battery of model LR6 to prepare alkaline manganese batteries.

[0104] The electrical performance of the alkaline zinc-manganese batteries prepared in Examples 1-8 and Comparative Examples 1-2 was tested. 10 batteries were taken for each test group, and the average value was taken as the test result. The results are shown in Table 1, and the specific tests are as follows:

[0105] AC impedance value: The battery was discharged at a current of 500 mA to 50% SOC at 25 °C, a voltage of 10 mV was applied to the battery, and a scan was performed in the frequency range of 0.1 Hz - 100 KHz, and the impedance value was recorded;

[0106] Initial battery discharge time: The test temperature was 25 °C, and the battery was discharged under the conditions of a discharge current and a cut-off voltage of 500 mA and 0.8 V, respectively;

[0107] Battery discharge time after storage: Store the battery for 6 months in an environment with a temperature below 25°C and a relative humidity less than 75%, and then discharge it under the conditions of a test temperature of 25°C, a discharge current of 500 mA, and a cut-off voltage of 0.8 V.

[0108] Retention rate of stored battery capacity: Take the percentage of the ratio of the battery discharge time during the storage period to the battery discharge time during the initial period as the retention rate of the stored battery capacity.

[0109] Table 1 Performance test results of alkaline zinc-manganese batteries

[0110]

[0111]

[0112] As can be seen from the results in Table 1, the water contact angle of the conductive coatings in Examples 1-8 is significantly smaller than that in Comparative Examples 1-2, indicating that the water-based adhesive prepared by copolymerizing a hydrophilic monomer and an acrylic monomer provides good hydrophilicity for the carbon-based material. At the same time, its low electron resistivity shows that the water-based adhesive plays a good dispersing role for the carbon-based material, constructing a uniform and dense electron conduction network structure. According to the impedance values measured for alkaline manganese batteries, the water-based conductive agent can provide a good electron channel for the electrode, effectively reducing the internal resistance of the battery, enabling the battery to obtain a longer discharge service life during the initial period. At the same time, due to the good stability of the electrode prepared therefrom, the retention rate of the stored battery capacity is also improved, enhancing the storage life of the battery.

[0113] Although the specific embodiments of the present invention have been described above, those skilled in the art of this technology should understand that the specific embodiments we described are illustrative only and not used to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should all be covered by the scope protected by the claims of the present invention.

Claims

1. An aqueous conductive agent for alkaline manganese batteries, characterized in that: Includes water-based binders, electrolytes, and carbon-based materials; The water-based adhesive is obtained by polymerizing a hydrophilic monomer and an acrylic monomer in an electrolyte; The particle size of the water-based adhesive is designable; The carbon-based material is uniformly dispersed in the aqueous binder.

2. The aqueous conductive agent for alkaline manganese battery according to claim 1, characterized in that: The hydrophilic monomer is selected from one or more combinations of sodium methyl allyl hydroxypropane sulfonate, sodium alkyl amide vinyl sulfonate, sodium methyl propylene sulfonate, sodium tetradecene sulfonate, sodium styrene sulfonate, and sodium alkylphenol allyl polyether sulfate.

3. An aqueous conductive agent for alkaline manganese batteries according to claim 1 or 2, characterized in that: The acrylic monomer is selected from one or more combinations of methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl acrylate.

4. The aqueous conductive agent for alkaline manganese battery according to claim 1, characterized in that: The electrolyte is selected from sodium hydroxide solution, and the mass concentration of the sodium hydroxide solution is 30% to 50%.

5. The aqueous conductive agent for alkaline manganese battery according to claim 1, characterized in that: The carbon-based material is selected from one or more combinations of conductive carbon black, conductive graphite, carbon nanotubes, graphene and carbon fibers.

6. The aqueous conductive agent for alkaline manganese battery according to claim 1, characterized in that: The amount of the hydrophilic monomer used accounts for 10% to 40% by weight of the amount of the acrylic monomer used.

7. The aqueous conductive agent for alkaline manganese battery according to claim 1, characterized in that: The mass ratio of the carbon-based material to the aqueous adhesive is 60-90:10-40.

8. A method for preparing an aqueous conductive agent for alkaline manganese battery, characterized in that: The steps include: S1, adding a hydrophilic monomer and an acrylic monomer into an electrolyte according to a certain ratio, stirring at a high speed to obtain a pre-emulsion; Adding sodium persulfate into deionized water and mixing well to obtain an initiator solution; S2, adding part of the pre-emulsion into a reaction kettle and heating it to 80° C., adding the initiator solution to react, and obtaining a blue fluorescent seed emulsion; S3, adding the remaining part of the pre-emulsion to the blue fluorescent seed emulsion at a constant speed, cooling and discharging after the reaction is completed, to obtain a water-based adhesive; S4. Evenly dispersing the carbon-based material in an aqueous binder to obtain an aqueous conductive agent.

9. The method for preparing an aqueous conductive agent for alkaline manganese battery according to claim 8, characterized in that: The hydrophilic monomer is selected from the group consisting of one or more combinations of sodium methyl allyl hydroxypropane sulfonate, sodium alkyl amide vinyl sulfonate, sodium methyl propylene sulfonate, sodium tetradecene sulfonate, sodium styrene sulfonate, and sodium alkylphenol allyl polyether sulfate; The acrylic monomer is selected from one or more of methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl acrylate; The amount of the hydrophilic monomer is 10% to 40% by weight of the amount of the acrylic monomer; The electrolyte is selected from sodium hydroxide solution with a mass concentration of 30% to 50%; The carbon-based material is selected from one or more combinations of conductive carbon black, conductive graphite, carbon nanotubes, graphene and carbon fiber; The mass ratio of the carbon-based material to the aqueous adhesive is 60-90:10-40.

10. An alkaline manganese battery, characterized in that: The aqueous conductive agent comprises the aqueous conductive agent according to any one of claims 1 to 7, or comprises the aqueous conductive agent prepared by the preparation method according to claim 8 or 9.

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