Steel shell of alkaline zinc-manganese dioxide cell and alkaline zinc-manganese dioxide cell

Abstract

The invention discloses a steel shell of an alkaline zinc-manganese dioxide cell. The steel shell of the alkaline zinc-manganese dioxide cell comprises a current collector steel shell, wherein the inner wall of the current collector steel shell is coated with a graphene-modified conductive coating, and the thickness of the conductive coating is 0.01 microns to 20 microns. The coverage density and the adhesive property between the conductive coating and the inner surface of the steel shell are improved; the radial resistance of a cell and the interface resistance between an anodal ring and the steel shell are reduced; by using the steel shell of the alkaline zinc-manganese dioxide cell, the high-current discharge performance of the alkaline zinc-manganese dioxide cell is further improved.

Description

technical field

[0001] The invention relates to the technical field of a conductive coating that can be used for a steel shell of an alkaline zinc-manganese battery, in particular to a steel shell of an alkaline zinc-manganese battery. Background technique

[0002] Alkaline zinc-manganese battery is mainly composed of five parts: negative electrode, diaphragm paper, electrolyte, and shell; the negative electrode of alkaline zinc-manganese battery is mainly composed of zinc powder, water-absorbing polymer as gel agent, and KOH dissolved in ZnO as electrolyte The prepared slurry mixture. The positive electrode is mainly manganese dioxide (MnO2), graphite, adding an appropriate amount of binder or release agent and KOH electrolyte, and mixing evenly to form a positive electrode mixture with a ring structure after tableting, granulation, and ringing. The separator paper is a special porous membrane, and the electrolyte is made of KOH solution. The shell is a sealing device for...

Examples

preparation example Construction

[0040] The steel casing of the alkaline zinc-manganese battery of the present invention is modified by a graphene coating, and its preparation method comprises the following steps:

[0041] a provide a steel shell;

[0042] Steel shells can be pre-nickel-plated steel shells or post-nickel-plated steel shells, which are punched from steel strips; the pre-nickel-plated steel shells are first punched with nickel-plated steel strips and then punched into fixed-shaped open steel shells and then passed through It is obtained by cleaning; after the nickel-plated steel shell is a wire, the steel strip is punched into an open steel shell with a fixed shape, and then it is obtained through degreasing, electroplating, and cleaning; It is sufficient to limit the purpose of the invention;

[0043] B uniformly disperse graphene, conventional conductive agent, binding agent and a small amount of additives such as stabilizer, neutralizer and defoamer in solvent to obtain mixed slurry;

[00...

Embodiment 1

[0064] Obtain graphene material by graphite oxide reduction method, the thickness of graphene material is 10 nanometers, and specific surface area is 2500㎡ / g, and area is 0.01 micron, with 49wt% graphene, 50wt% carbon black, 1wt% CMC binding agent and A small amount of dispersant sodium dodecylsulfonate is dispersed in water, and the mixed slurry is obtained by ultrasonic dispersion; the above mixed slurry is sprayed and dried on the inner wall of the steel shell, and finally the alkalinity of the graphene-modified conductive coating is obtained. The steel case of the zinc-manganese battery, the graphene modified coating load of the steel case is 0.6mg / piece, and the thickness of the conductive coating is 1 micron; then insert the positive electrode ring into the steel case, insert the separator paper accordingly, and inject the zinc paste , insert the current collector composed of copper nails, negative electrode bottom and sealing ring, crimp and shape the seal to obtain the ...

Embodiment 2

[0066] Obtain graphene material by physical method, the thickness of graphene material is 100 nanometers, and specific surface area is 10㎡ / g, and area is 10 microns, and 98wt% graphene, 1wt% acetylene black, 1wt% polyvinylidene fluoride binder And a small amount of dispersant sodium dodecylsulfonate is dispersed in water, and the mixed slurry is obtained through ultrasonic dispersion; the above mixed slurry is sprayed and dried on the inner wall of the steel shell, and finally the alkali of the graphene-modified conductive coating is obtained. The steel case of the non-toxic zinc-manganese battery, the thickness of the conductive coating is 20 microns; then the positive electrode ring is embedded in the steel case, and the separator paper is inserted accordingly, the zinc paste is injected, and the current collector composed of copper nails, negative electrode bottom and sealing ring is inserted. , crimping and shaping to get the LR6 battery. The test method is the same as in ...

technical field

[0001] The invention relates to the technical field of a conductive coating that can be used for a steel shell of an alkaline zinc-manganese battery, in particular to a steel shell of an alkaline zinc-manganese battery. Background technique

[0002] Alkaline zinc-manganese battery is mainly composed of five parts: negative electrode, diaphragm paper, electrolyte, and shell; the negative electrode of alkaline zinc-manganese battery is mainly composed of zinc powder, water-absorbing polymer as gel agent, and KOH dissolved in ZnO as electrolyte The prepared slurry mixture. The positive electrode is mainly manganese dioxide (MnO2), graphite, adding an appropriate amount of binder or release agent and KOH electrolyte, and mixing evenly to form a positive electrode mixture with a ring structure after tableting, granulation, and ringing. The separator paper is a special porous membrane, and the electrolyte is made of KOH solution. The shell is a sealing device for...

Examples

preparation example Construction

[0040] The steel casing of the alkaline zinc-manganese battery of the present invention is modified by a graphene coating, and its preparation method comprises the following steps:

[0041] a provide a steel shell;

[0042] Steel shells can be pre-nickel-plated steel shells or post-nickel-plated steel shells, which are punched from steel strips; the pre-nickel-plated steel shells are first punched with nickel-plated steel strips and then punched into fixed-shaped open steel shells and then passed through It is obtained by cleaning; after the nickel-plated steel shell is a wire, the steel strip is punched into an open steel shell with a fixed shape, and then it is obtained through degreasing, electroplating, and cleaning; It is sufficient to limit the purpose of the invention;

[0043] B uniformly disperse graphene, conventional conductive agent, binding agent and a small amount of additives such as stabilizer, neutralizer and defoamer in solvent to obtain mixed slurry;

[00...

Embodiment 1

[0064] Obtain graphene material by graphite oxide reduction method, the thickness of graphene material is 10 nanometers, and specific surface area is 2500㎡ / g, and area is 0.01 micron, with 49wt% graphene, 50wt% carbon black, 1wt% CMC binding agent and A small amount of dispersant sodium dodecylsulfonate is dispersed in water, and the mixed slurry is obtained by ultrasonic dispersion; the above mixed slurry is sprayed and dried on the inner wall of the steel shell, and finally the alkalinity of the graphene-modified conductive coating is obtained. The steel case of the zinc-manganese battery, the graphene modified coating load of the steel case is 0.6mg / piece, and the thickness of the conductive coating is 1 micron; then insert the positive electrode ring into the steel case, insert the separator paper accordingly, and inject the zinc paste , insert the current collector composed of copper nails, negative electrode bottom and sealing ring, crimp and shape the seal to obtain the ...

Embodiment 2

[0066] Obtain graphene material by physical method, the thickness of graphene material is 100 nanometers, and specific surface area is 10㎡ / g, and area is 10 microns, and 98wt% graphene, 1wt% acetylene black, 1wt% polyvinylidene fluoride binder And a small amount of dispersant sodium dodecylsulfonate is dispersed in water, and the mixed slurry is obtained through ultrasonic dispersion; the above mixed slurry is sprayed and dried on the inner wall of the steel shell, and finally the alkali of the graphene-modified conductive coating is obtained. The steel case of the non-toxic zinc-manganese battery, the thickness of the conductive coating is 20 microns; then the positive electrode ring is embedded in the steel case, and the separator paper is inserted accordingly, the zinc paste is injected, and the current collector composed of copper nails, negative electrode bottom and sealing ring is inserted. , crimping and shaping to get the LR6 battery. The test method is the same as in ...

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