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Structure and preparation method of high-utilization-rate manganese oxide electrode of neutral zinc-manganese battery

A zinc-manganese battery, manganese oxide technology, applied in battery electrodes, electrode manufacturing, active material electrodes, etc., can solve the problems of low porosity, low stacking density of pole pieces, poor electronic and ionic conductivity, etc., and achieve high specific capacity. , the effect of high energy density and excellent ion conduction structural characteristics

Active Publication Date: 2019-08-02
浙江浙能中科储能科技有限公司
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Problems solved by technology

[0008] Aiming at the problems of low bulk density, low porosity, and poor electronic and ion conductivity of the pole pieces prepared from manganese oxide materials for neutral zinc-manganese batteries, the present invention proposes a structure of manganese oxide electrodes with high utilization rate for neutral zinc-manganese batteries and preparation method

Method used

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  • Structure and preparation method of high-utilization-rate manganese oxide electrode of neutral zinc-manganese battery
  • Structure and preparation method of high-utilization-rate manganese oxide electrode of neutral zinc-manganese battery
  • Structure and preparation method of high-utilization-rate manganese oxide electrode of neutral zinc-manganese battery

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Weigh 60 grams of manganese oxide, 5 grams of sodium dodecylbenzene sulfonate, 20 grams of graphite and other materials, add 400 grams of deionized water, perform ball milling for 24 hours and fully disperse.

[0028] (2) Add 3 grams of methyl methacrylate and 8 grams of sodium carboxymethyl cellulose to the dispersion in step (1), and continue stirring to form a positive electrode slurry.

[0029] (3) Put the slurry in step (2) in an oven at 80° C., dry for 24 hours, and then pulverize and grind to obtain a powder material.

[0030] (4) Weigh 5 grams of the powder material obtained in step (3), and put 2.5 grams of powder material evenly at the bottom of the tablet-type abrasive tool, and put it into a 3 cm and 6 cm length and width respectively. Stainless steel conductive mesh, and then evenly place the remaining powder on the surface of the conductive mesh, control the pressure at 50MPa, take it out after holding the pressure for 30 minutes, and you can get a hig...

Embodiment 2

[0033] (1) Weigh 80 grams of manganese oxide, 3 grams of sodium hexametaphosphate, 10 grams of acetylene black, 10 grams of carbon nanotubes and other materials, add 200 grams of deionized water, and perform 24-hour ball milling to form a viscous dispersion system .

[0034] (2) Add 1 gram of methyl methacrylate and 5 grams of polytetrafluoroethylene to the dispersion system of step (1), and continue stirring to form a positive electrode paste.

[0035] (3) Put the paste in step (2) into a roller press, control the pressure to 10MPa, and press it into a sheet-shaped positive electrode semi-finished product, then place the three-dimensional porous foamed carbon in the roller press, and place the two positive electrodes The semi-finished products are respectively placed on the two sides of the three-dimensional porous carbon foam, and the control pressure is 30MPa. After rolling, the manganese oxide electrode pole piece with high utilization rate can be obtained.

[0036] In or...

Embodiment 3

[0038] (1) Weigh 100 grams of manganese oxide, 5 grams of polyvinyl alcohol, 20 grams of graphite, 10 grams of acetylene black and other materials, add them into 600 grams of deionized water, perform ball milling for 24 hours and fully disperse them.

[0039] (2) Add 3 grams of ethylene methyl acrylate and 15 grams of polyacrylate to the dispersion in step (1), and continue stirring to form a positive electrode slurry.

[0040] (3) Place the slurry in step (2) in an oven at 70° C., dry for 24 hours, and then pulverize and grind to obtain a powder material.

[0041] (4) Weigh 10 grams of the powder material obtained in step (3), first put 5 grams of powder material evenly at the bottom of the tablet-type abrasive tool, and put it into a 5 cm and 10 cm length and width respectively. Carbon felt conductive grid, and then evenly place the remaining powder on the surface of the conductive grid, control the pressure at 60MPa, take it out after holding the pressure for 30 minutes, an...

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Abstract

The invention relates to a structure of a high-utilization-rate manganese oxide electrode of a neutral zinc-manganese battery. The structure comprises a porous conductive current collector substrate and a manganese oxide composite material, of high bulk density, compacted on the substrate, the thickness of the electrode is 3-10mm, and the mass ratio of the current collector substrate to the manganese oxide composite material is 1: (5-20); the porous conductive current collector substrate includes a stainless steel net, foaming carbon, a carbon felt or carbon paper; and the manganese oxide composite material is formed by dispersing manganese oxide, a stabilizing agent, a conductive agent, an intensifying agent and a binder / cross-linking agent in a solvent. The structure and preparation method have the advantages that the stabilizing agent, conductive agent, intensifying agent and binder / cross-linking agent are added into the manganese oxide material, the porous thick manganese oxide electrode is prepared by rolling or die tabletting, and the disadvantages that present manganese oxide material preparation is low in the pole piece bulk density, low in the porosity and low in electronand ion conductivity are overcome effectively.

Description

technical field [0001] The invention belongs to the technical field of neutral zinc-manganese batteries, and in particular relates to a structure and a preparation method of a manganese oxide porous thick electrode with high utilization rate. Background technique [0002] Under the current international background of energy crisis and environmental pollution, the development of green and environmentally friendly new energy technologies will become increasingly urgent. As a new type of energy technology, lithium-ion batteries are widely used in many fields such as electronic equipment and vehicles. However, due to the disadvantages of high cost of lithium resources and poor safety performance, it is necessary to develop new types of batteries with high specific energy, good safety performance and low cost. Energy storage batteries will become a key research direction. [0003] The rechargeable aqueous zinc / manganese oxide battery uses metal zinc as the negative electrode, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/04H01M4/36H01M4/50H01M4/62H01M10/36
CPCH01M4/02H01M4/0433H01M4/0435H01M4/362H01M4/50H01M4/62H01M4/621H01M4/622H01M4/623H01M4/625H01M10/36H01M2004/021H01M2004/028Y02E60/10
Inventor 李卓斌刘云召秦刚华寿春晖洪凌刘宇
Owner 浙江浙能中科储能科技有限公司
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