CN117525307A - Alkaline battery cathode material and preparation method and application thereof - Google Patents

Alkaline battery cathode material and preparation method and application thereof Download PDF

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CN117525307A
CN117525307A CN202410016289.XA CN202410016289A CN117525307A CN 117525307 A CN117525307 A CN 117525307A CN 202410016289 A CN202410016289 A CN 202410016289A CN 117525307 A CN117525307 A CN 117525307A
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negative electrode
zinc oxide
zinc
alkaline battery
parts
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CN117525307B (en
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吴书丞
王嘉军
李汉祥
王能军
周胜欣
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Shandong Huatai New Energy Battery Co ltd
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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
    • H01M4/24—Electrodes for alkaline accumulators
    • H01M4/26—Processes of manufacture
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G9/00—Compounds of zinc
    • C01G9/02—Oxides; Hydroxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/24—Alkaline accumulators
    • H01M10/30—Nickel accumulators
    • 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
    • H01M4/24—Electrodes for alkaline accumulators
    • H01M4/244—Zinc electrodes
    • 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
    • H01M4/24—Electrodes for alkaline accumulators
    • H01M4/26—Processes of manufacture
    • H01M4/28—Precipitating active material on the carrier
    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/40—Electric properties
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention discloses an alkaline battery cathode material, a preparation method and application thereof, and belongs to the technical field of battery energy materials. The appearance of the modified active zinc oxide prepared by the method is of a multilayer three-dimensional structure, the contact area of electrolyte can be increased, so that faster electron transmission and speed capability are realized, meanwhile, lanthanum and silver are doped, la and Ag can both improve hydrogen evolution overpotential, the synergistic effect of the lanthanum and silver can be realized, the hydrogen evolution overpotential of an electrode is improved, the occurrence of hydrogen evolution reaction can be reduced, the growth mechanism of zinc precipitation is influenced, the corrosion inhibition effect is obvious, meanwhile, the doping modification of metal is beneficial, and the structural stability and capacity performance of a zinc electrode are greatly improved. Meanwhile, the conductivity of the material is improved, so that the electrochemical polarization of the electrode in the charge and discharge process is reduced, and the rate capability and the cycle performance of the battery are improved. The material can be applied to the zinc cathode of the alkaline battery, in particular to an alkaline zinc-nickel secondary battery, and has wide application prospect.

Description

Alkaline battery cathode material and preparation method and application thereof
Technical Field
The invention belongs to the technical field of battery energy materials, and particularly relates to an alkaline battery negative electrode material, a preparation method and application thereof.
Background
The zinc-nickel secondary battery consists of a nickel positive electrode, a zinc negative electrode and electrolyte, wherein the positive electrode is Ni (OH) 2 NiOOH, znO/Zn as negative electrode and KOH solution as electrolyte. Ni (OH) during charging 2 The electrons are lost to be converted into NiOOH, znO is converted into Zn, and when the ZnO is discharged, the electrolyte KOH aqueous solution plays a role in providing ion migration charge in the charge-discharge reaction of the zinc-nickel battery.
There are a number of problems with current alkaline zinc cells. The cycle performance of the zinc-nickel secondary battery is reduced due to the problems of deformation, dendrite and the like of the zinc negative electrode used by the zinc-nickel secondary battery. In view of this problem, research efforts have been made by researchers on the improvement of zinc cathodes, wherein various additives are employed to alleviate these problems, including negative electrode additives, electrolyte additives, and the like. For example, improvements in electrolyte formulation have greatly reduced the solubility of zinc in alkaline solutions through the use of beneficial additives such as sodium fluoride, sodium phosphate, and the like, in addition to saturated zinc oxide, thereby improving the performance of the zinc electrode. In addition, some novel negative electrode materials such as calcium zincate, zinc aluminum hydrotalcite and the like have been proposed by researchers as zinc negative electrode active materials, and these novel materials also improve the cycle performance of zinc-nickel secondary batteries to some extent. For example, application No. 202211433796.0, which incorporates a series of organic and inorganic additives to enhance the discharge performance of the zinc electrode.
In the prior art, the components are complex, and additionally added metal or nonmetal components increase the preparation cost, and more importantly, the simple doping of various additives can generate certain negative effects on the battery performance, such as poor battery capacity and corrosion resistance, unstable circulation and the like, so that the battery is difficult to effectively apply and popularize in actual production.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an active zinc anode material which can greatly improve the battery performance on one hand and effectively inhibit the corrosion of zinc on the other hand, and can prolong the cycle service life of the zinc.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the alkaline battery cathode material is prepared from the following raw materials in parts by weight: 60-70 parts of modified layered zinc oxide, 0.5-1 part of dispersing agent, 1-3 parts of carboxymethyl cellulose, 35-45 parts of electrolyte and 0.1-0.5 part of additive.
Preferably, the dispersing agent is sodium dodecyl benzene sulfonate and/or fatty alcohol polyoxyethylene ether.
Preferably, the preparation method of the modified layered zinc oxide comprises the following steps:
(1) Preparing 50mL of 0.2mol/L zinc nitrate solution, adding 50mL of 0.8mol/L sodium hydroxide solution under magnetic stirring, adding 10mmol of hexamethylenetetramine HMTA and 10mmol of sodium lauryl sulfate, and magnetically stirring at room temperature for 30min;
(2) Adding 15mmol of trisodium citrate, 15mg of lanthanum nitrate and 15mg of silver nitrate under continuous stirring, stirring at room temperature for 30min, transferring the solution into a hydrothermal reaction kettle, maintaining at 160 ℃ for 12 hours, cooling the hydrothermal reaction kettle to room temperature, centrifuging at high speed, and washing the precipitate with absolute ethyl alcohol and deionized water for several times; the precipitate is dried at 60 ℃ for overnight, and then is calcined and activated for 3 hours at 400 ℃ to obtain the modified layered zinc oxide.
Preferably, the electrolyte is an aqueous solution of potassium hydroxide, wherein the mass concentration of the potassium hydroxide is 40-50%, and the balance is purified water.
Preferably, the additive is at least one or more of indium oxide, bismuth oxide and stannous oxide.
The preparation method of the alkaline battery cathode material comprises the following preparation steps:
(1) Preparing modified layered zinc oxide;
(2) Uniformly mixing modified layered zinc oxide, carboxymethyl cellulose and additives to obtain powder, adding the electrolyte and the dispersing agent, uniformly mixing, vacuumizing to obtain a negative electrode material, coating the negative electrode material on two sides of a copper strip through a slurry drawing die, drying, rolling and cutting to obtain a negative plate, and then using the negative electrode plate.
An application of an alkaline battery cathode material is used for an alkaline zinc-nickel secondary battery.
The appearance of the modified active zinc oxide prepared by the method is of a multilayer three-dimensional structure, the contact area of electrolyte can be increased, so that faster electron transmission and speed capability are realized, meanwhile, lanthanum and silver are doped, la and Ag can both improve hydrogen evolution overpotential, the synergistic effect of the lanthanum and silver can be realized, the hydrogen evolution overpotential of an electrode is improved, the occurrence of hydrogen evolution reaction can be reduced, the growth mechanism of zinc precipitation is influenced, the corrosion inhibition effect is obvious, meanwhile, the doping modification of metal is beneficial, and the structural stability and capacity performance of a zinc electrode are greatly improved. Meanwhile, the conductivity of the material is improved, so that the electrochemical polarization of the electrode in the charge and discharge process is reduced, and the rate capability and the cycle performance of the battery are improved. The material can be applied to the zinc cathode of the alkaline battery, in particular to an alkaline zinc-nickel secondary battery, and has wide application prospect.
Drawings
FIG. 1 is a graph showing the microscopic morphology of the modified layered zinc oxide obtained in example 8 of the present invention;
FIG. 2 is a graph showing cyclic voltammogram measurements of electrochemical performance using the negative electrode materials of example 8 and comparative examples 1-4 of the present invention.
Detailed Description
The technical scheme of the present invention is further described below with reference to specific examples, but is not limited thereto.
Example 1
The alkaline battery cathode material is prepared from the following raw materials in parts by weight: 60 parts of modified layered zinc oxide, 0.5 part of dispersing agent, 1 part of carboxymethyl cellulose, 35 parts of electrolyte and 0.1 part of additive.
The dispersing agent is sodium dodecyl benzene sulfonate.
The preparation method of the modified layered zinc oxide comprises the following steps:
(1) Preparing 50mL of 0.2mol/L zinc nitrate solution, adding 50mL of 0.8mol/L sodium hydroxide solution under magnetic stirring, adding 10mmol of hexamethylenetetramine HMTA and 10mmol of sodium lauryl sulfate, and magnetically stirring at room temperature for 30min;
(2) Adding 15mmol of trisodium citrate, 15mg of lanthanum nitrate and 15mg of silver nitrate under continuous stirring, stirring at room temperature for 30min, transferring the solution into a hydrothermal reaction kettle, maintaining at 160 ℃ for 12 hours, cooling the hydrothermal reaction kettle to room temperature, centrifuging at high speed, and washing the precipitate with absolute ethyl alcohol and deionized water for several times; the precipitate is dried at 60 ℃ for overnight, and then is calcined and activated for 3 hours at 400 ℃ to obtain the modified layered zinc oxide.
The electrolyte is an aqueous solution of potassium hydroxide, wherein the mass concentration of the potassium hydroxide is 40%, and the balance is purified water.
The additive is indium oxide.
The preparation method of the alkaline battery cathode material comprises the following preparation steps:
(1) Preparing modified layered zinc oxide;
(2) Uniformly mixing modified layered zinc oxide, carboxymethyl cellulose and additives to obtain powder, adding the electrolyte and the dispersing agent, uniformly mixing, vacuumizing to obtain a negative electrode material, coating the negative electrode material on two sides of a copper strip through a slurry drawing die, drying, rolling and cutting to obtain a negative plate, and then using the negative electrode plate.
An application of an alkaline battery cathode material is used for an alkaline zinc-nickel secondary battery.
Example 2
The alkaline battery cathode material is prepared from the following raw materials in parts by weight: 62 parts of modified layered zinc oxide, 0.6 part of dispersing agent, 2 parts of carboxymethyl cellulose, 38 parts of electrolyte and 0.2 part of additive.
The dispersing agent is fatty alcohol polyoxyethylene ether.
The preparation method of the modified layered zinc oxide is the same as in example 1.
The electrolyte is an aqueous solution of potassium hydroxide, wherein the mass concentration of the potassium hydroxide is 41%, and the balance is purified water.
The additive is bismuth oxide.
A method for preparing a cathode material of an alkaline battery, which is the same as in example 1.
Example 3
The alkaline battery cathode material is prepared from the following raw materials in parts by weight: 65 parts of modified layered zinc oxide, 0.5 part of dispersing agent, 1 part of carboxymethyl cellulose, 37 parts of electrolyte and 0.1 part of additive.
The dispersing agent is prepared by mixing sodium dodecyl benzene sulfonate and fatty alcohol polyoxyethylene ether according to a mass ratio of 1:1.
The preparation method of the modified layered zinc oxide is the same as in example 1.
The electrolyte is an aqueous solution of potassium hydroxide, wherein the mass concentration of the potassium hydroxide is 50%, and the balance is purified water.
The additive is stannous oxide.
A method for preparing a cathode material of an alkaline battery, which is the same as in example 1.
Example 4
The alkaline battery cathode material is prepared from the following raw materials in parts by weight: 70 parts of modified layered zinc oxide, 0.5 part of dispersing agent, 1 part of carboxymethyl cellulose, 35 parts of electrolyte and 0.3 part of additive.
The dispersing agent is sodium dodecyl benzene sulfonate.
The preparation method of the modified layered zinc oxide is the same as in example 1.
The electrolyte is an aqueous solution of potassium hydroxide, wherein the mass concentration of the potassium hydroxide is 50%, and the balance is purified water.
The additive is indium oxide.
A method for preparing a cathode material of an alkaline battery, which is the same as in example 1.
Example 5
The alkaline battery cathode material is prepared from the following raw materials in parts by weight: 64 parts of modified layered zinc oxide, 1 part of dispersing agent, 3 parts of carboxymethyl cellulose, 40 parts of electrolyte and 0.4 part of additive.
The dispersing agent is fatty alcohol polyoxyethylene ether.
The preparation method of the modified layered zinc oxide is the same as in example 1.
The electrolyte is an aqueous solution of potassium hydroxide, wherein the mass concentration of the potassium hydroxide is 40%, and the balance is purified water.
The additive is bismuth oxide.
A method for preparing a cathode material of an alkaline battery, which is the same as in example 1.
Example 6
The alkaline battery cathode material is prepared from the following raw materials in parts by weight: 68 parts of modified layered zinc oxide, 0.6 part of dispersing agent, 3 parts of carboxymethyl cellulose, 41 parts of electrolyte and 0.5 part of additive.
The dispersing agent is fatty alcohol polyoxyethylene ether.
The preparation method of the modified layered zinc oxide is the same as in example 1.
The electrolyte is an aqueous solution of potassium hydroxide, wherein the mass concentration of the potassium hydroxide is 40%, and the balance is purified water.
The additive is indium oxide.
A method for preparing a cathode material of an alkaline battery, which is the same as in example 1.
Example 7
The alkaline battery cathode material is prepared from the following raw materials in parts by weight: 65 parts of modified layered zinc oxide, 0.7 part of dispersing agent, 2 parts of carboxymethyl cellulose, 42 parts of electrolyte and 0.3 part of additive.
The dispersing agent is fatty alcohol polyoxyethylene ether.
The preparation method of the modified layered zinc oxide is the same as in example 1.
The electrolyte is an aqueous solution of potassium hydroxide, wherein the mass concentration of the potassium hydroxide is 45%, and the balance is purified water.
The additive is indium oxide.
A method for preparing a cathode material of an alkaline battery, which is the same as in example 1.
Example 8
The alkaline battery cathode material is prepared from the following raw materials in parts by weight: 70 parts of modified layered zinc oxide, 1 part of dispersing agent, 3 parts of carboxymethyl cellulose, 45 parts of electrolyte and 0.5 part of additive.
The dispersing agent is sodium dodecyl benzene sulfonate.
The preparation method of the modified layered zinc oxide is the same as in example 1.
The electrolyte is an aqueous solution of potassium hydroxide, wherein the mass concentration of the potassium hydroxide is 45%, and the balance is purified water.
The additive is bismuth oxide.
A method for preparing a cathode material of an alkaline battery, which is the same as in example 1.
Comparative example 1
The alkaline battery cathode material is prepared from the following raw materials in parts by weight: 70 parts of modified layered zinc oxide, 1 part of dispersing agent, 3 parts of carboxymethyl cellulose, 45 parts of electrolyte and 0.5 part of additive.
The preparation method of the modified layered zinc oxide comprises the following steps:
(1) Preparing 50mL of 0.2mol/L zinc nitrate solution, adding 50mL of 0.8mol/L sodium hydroxide solution under magnetic stirring, adding 10mmol of hexamethylenetetramine HMTA and 10mmol of sodium lauryl sulfate, and magnetically stirring at room temperature for 30min;
(2) Adding 15mmol of trisodium citrate and 15mg of silver nitrate under continuous stirring, stirring at room temperature for 30min, transferring the solution into a hydrothermal reaction kettle, maintaining at 160 ℃ for 12 hours, cooling the hydrothermal reaction kettle to room temperature, centrifuging at high speed, and washing the precipitate with absolute ethyl alcohol and deionized water for several times; the precipitate is dried at 60 ℃ for overnight, and then is calcined and activated for 3 hours at 400 ℃ to obtain the modified layered zinc oxide.
A method for preparing a cathode material of an alkaline battery, which is the same as in example 1.
In this comparative example, the raw materials and the preparation method were the same as in example 8, except that lanthanum nitrate was not added to the modified layered zinc oxide.
Comparative example 2
In this comparative example, the raw materials and the production method were the same as in example 8, except that silver nitrate was not added to the modified layered zinc oxide.
The preparation method of the modified layered zinc oxide comprises the following steps:
(1) Preparing 50mL of 0.2mol/L zinc nitrate solution, adding 50mL of 0.8mol/L sodium hydroxide solution under magnetic stirring, adding 10mmol of hexamethylenetetramine HMTA and 10mmol of sodium lauryl sulfate, and magnetically stirring at room temperature for 30min;
(2) Adding 15mmol of trisodium citrate and 15mg of lanthanum nitrate under continuous stirring, stirring at room temperature for 30min, transferring the solution into a hydrothermal reaction kettle, maintaining at 160 ℃ for 12 hours, cooling the hydrothermal reaction kettle to room temperature, centrifuging at high speed, and washing the precipitate with absolute ethyl alcohol and deionized water for several times; the precipitate is dried at 60 ℃ for overnight, and then is calcined and activated for 3 hours at 400 ℃ to obtain the modified layered zinc oxide.
Comparative example 3
In this comparative example, the raw materials and the preparation method were the same as in example 8, except that lanthanum nitrate and silver nitrate were not added to the modified layered zinc oxide.
The preparation method of the modified layered zinc oxide comprises the following steps:
(1) Preparing 50mL of 0.2mol/L zinc nitrate solution, adding 50mL of 0.8mol/L sodium hydroxide solution under magnetic stirring, adding 10mmol of hexamethylenetetramine HMTA and 10mmol of sodium lauryl sulfate, and magnetically stirring at room temperature for 30min;
(2) Adding 15mmol of trisodium citrate under continuous stirring, stirring for 30min at room temperature, transferring the solution into a hydrothermal reaction kettle, keeping the solution at 160 ℃ for 12 hours, cooling the hydrothermal reaction kettle to room temperature, centrifuging at high speed, and washing the precipitate with absolute ethyl alcohol and deionized water for several times; the precipitate is dried at 60 ℃ for overnight, and then is calcined and activated for 3 hours at 400 ℃ to obtain the modified layered zinc oxide.
Comparative example 4
Commercial zinc oxide was used as the starting material, and the remainder of the starting material and preparation method were the same as in example 8. Namely: the alkaline battery cathode material is prepared from the following raw materials in parts by weight: 70 parts of zinc oxide, 1 part of dispersing agent, 3 parts of carboxymethyl cellulose, 45 parts of electrolyte and 0.5 part of additive.
The preparation method of the alkaline battery cathode material comprises the following preparation steps: uniformly mixing zinc oxide, carboxymethyl cellulose and additives to obtain powder, adding the electrolyte and the dispersing agent, uniformly mixing, vacuumizing to obtain a negative electrode material, coating the negative electrode material on two sides of a copper strip through a slurry drawing die, drying, rolling and cutting to obtain a negative plate, and then using the negative plate.
Performance test: experimental materials, negative electrode materials obtained in examples 1 to 8 and comparative examples 1 to 4.
And (3) manufacturing a negative electrode: coating the negative plate on two sides of the copper strip through a slurry drawing die, drying, rolling and cutting to obtain the negative plate, and then using the negative plate.
The testing method comprises the following steps: the prepared negative electrode and sintered nickel hydroxide electrode are taken as positive electrode, and are placed in an organic glass container to form a semi-sealed simulated battery. As electrolyte, a solution of 6MKOH+15g/LLiOH was used, and a polypropylene film was used as a separator.
The analog battery was subjected to constant current charge and discharge testing using a blue CT2001A battery test system (Wuhan LAND electronics co.ltd., china). Cyclic voltammetry and Tafel corrosion analysis were performed using a Chi660C electrochemical workstation (Shanghai Chenhua Instruments co., china).
Cell performance test: after the battery was activated at 0.2C, the battery was charged at 0.2C for 6 hours, then the battery was left to stand for 30 minutes, and then discharged at 0.2C and 5C to voltages of 1.4 and 1.2V, respectively, and the capacity properties of the negative electrode material were measured. Battery cycle performance test: the cells were each subjected to a 1C charge-discharge test at 25 ℃ ambient temperature, with capacity fade terminating the test at 80% of the highest capacity.
And analyzing the microscopic morphology of the zinc active composite material by using a scanning electron microscope, wherein a sample is subjected to metal spraying treatment.
The specific test results are shown in table 1:
TABLE 1 Performance test results
From the experimental results, the battery obtained by the anode material of the embodiment of the invention has high gram capacity, high volume specific capacity and good cycle stability, and simultaneously has higher corrosion potential and lower corrosion current density, the corrosion potential plays a vital role in electrode corrosion in electrochemical corrosion principle, the more negative the corrosion potential is, the greater the corrosion degree is, the corrosion current density is another parameter, the greater the corrosion speed is, the faster the corrosion speed is, and the smaller the opposite value is. Meaning better corrosion resistance. Meanwhile, the battery obtained by the embodiment of the invention has lower charge transfer resistance and high charge and discharge efficiency. The structure of the active zinc cathode and the combined action of lanthanum and silver realize the great improvement of the battery performance, and the comparative examples 1-4 changing the zinc cathode process show obvious weakening of the battery performance, which can also indicate that the modification means of the invention for zinc oxide is key for realizing the improvement of the battery performance, and the lack of effect is weak.
It should be noted that the above-mentioned embodiments are merely some, but not all embodiments of the preferred mode of carrying out the invention. It is evident that all other embodiments obtained by a person skilled in the art without making any inventive effort, based on the above-described embodiments of the invention, shall fall within the scope of protection of the invention.

Claims (7)

1. The alkaline battery cathode material is characterized by comprising the following raw materials in parts by weight: 60-70 parts of modified layered zinc oxide, 0.5-1 part of dispersing agent, 1-3 parts of carboxymethyl cellulose, 35-45 parts of electrolyte and 0.1-0.5 part of additive.
2. The negative electrode material for alkaline batteries according to claim 1, wherein the dispersant is sodium dodecylbenzene sulfonate and/or fatty alcohol polyoxyethylene ether.
3. The alkaline battery anode material according to claim 1, wherein the preparation method of the modified layered zinc oxide comprises the following steps:
(1) Preparing 50mL of 0.2mol/L zinc nitrate solution, adding 50mL of 0.8mol/L sodium hydroxide solution under magnetic stirring, adding 10mmol of hexamethylenetetramine HMTA and 10mmol of sodium lauryl sulfate, and magnetically stirring at room temperature for 30min;
(2) Adding 15mmol of trisodium citrate, 15mg of lanthanum nitrate and 15mg of silver nitrate under continuous stirring, stirring at room temperature for 30min, transferring the solution into a hydrothermal reaction kettle, maintaining at 160 ℃ for 12 hours, cooling the hydrothermal reaction kettle to room temperature, centrifuging at high speed, and washing the precipitate with absolute ethyl alcohol and deionized water for several times; the precipitate is dried at 60 ℃ for overnight, and then is calcined and activated for 3 hours at 400 ℃ to obtain the modified layered zinc oxide.
4. The negative electrode material for alkaline battery according to claim 1, wherein the electrolyte is an aqueous solution of potassium hydroxide, the mass concentration of potassium hydroxide being 40-50%, and the balance being purified water.
5. The negative electrode material for alkaline battery according to claim 1, wherein the additive is one or more of indium oxide, bismuth oxide and stannous oxide.
6. A method for producing the negative electrode material for alkaline batteries according to any one of claims 1 to 5, comprising the steps of:
(1) Preparing modified layered zinc oxide;
(2) Uniformly mixing modified layered zinc oxide, carboxymethyl cellulose and additives to obtain powder, adding the electrolyte and the dispersing agent, uniformly mixing, vacuumizing to obtain a negative electrode material, coating the negative electrode material on two sides of a copper strip through a slurry drawing die, drying, rolling and cutting to obtain a negative plate, and then using the negative electrode plate.
7. Use of the alkaline battery negative electrode material of any one of claims 1-5, for alkaline zinc-nickel secondary batteries.
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