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Preparation method of modified nickel hydroxide positive electrode material

A positive electrode material, nickel hydroxide technology, applied in the field of preparation of modified nickel hydroxide positive electrode material, can solve the problem of poor electronic conductivity of positive electrode, achieve the effect of improving conductivity, reducing cost and stabilizing structure

Pending Publication Date: 2022-03-04
南京安捷驰新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coating with a conjugated polymer material solves the problem of poor electronic conductivity of the nickel hydroxide positive electrode, effectively prolonging the cycle life of the positive electrode, and the performance is more significant under high-magnification conditions. In addition, the use of polymer coating can form a dense film body, inhibit fragmentation

Method used

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  • Preparation method of modified nickel hydroxide positive electrode material
  • Preparation method of modified nickel hydroxide positive electrode material
  • Preparation method of modified nickel hydroxide positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of modified nickel hydroxide positive electrode material, the steps are as follows:

[0041] (1) Preparation of cathode material:

[0042] In the electrolytic cell equipped with a diaphragm, nickel sulfate, zinc sulfate, manganese sulfate and aluminum sulfate solutions with a concentration of 0.5M / L are added to the cathode chamber, and the molar ratio of each salt is 9:0.5:0.3:0.2. The anode chamber is filled with 0.5M / L potassium sulfate solution, with nickel foam as the cathode and platinum as the anode. 0.1M / L ammonium chloride and 0.5M / L ammonia water are complexing agents, and sodium hydroxide solution is used to adjust the pH to 8 at 3mA / cm 2 Constant current electrolysis for 10 h, electrolysis at 50° C., to obtain the positive electrode material deposited on the nickel foam.

[0043] The multi-component positive electrode has been tested by scanning electron microscope and energy spectrum, such as figure 1 and figure 2 shown.

[0044] ...

Embodiment 2

[0047] A preparation method of modified nickel hydroxide positive electrode material, the steps are as follows:

[0048] (1) Preparation of cathode material:

[0049] Nickel sulfate, zinc sulfate, manganese sulfate and aluminum sulfate are configured into a mixed solution A with a concentration of 0.5M / L, and the molar ratio of each salt is 9:0.5:0.3:0.2. Prepare sodium hydroxide solution B with a concentration of 0.5M / L and ammonia solution C with a concentration of 0.1M / L; under the condition of mechanical stirring at 400r / min, the reaction temperature is controlled at 50°C, and three kinds of A, B, and C are added dropwise at the same time Control the pH of the solution to 10, react continuously for 8 hours, wash with deionized water, and dry to obtain the positive electrode material Ni 0.9 Zn 0.05 mn 0.03 al 0.02 (OH)2 .

[0050] (2) Conductive material coating:

[0051] The aniline hydrochloride and the positive electrode material were mixed in water at a mass ratio...

Embodiment 3

[0053] A preparation method of modified nickel hydroxide positive electrode material, the steps are as follows:

[0054] (1) Preparation of cathode material:

[0055] In the electrolytic cell equipped with a diaphragm, the cathode chamber is filled with nickel chloride, zinc chloride, manganese chloride and magnesium chloride solutions at a concentration of 2M / L, and the molar ratio of each salt is 9:0.5:0.3:0.2. The anode chamber is filled with 2M / L potassium nitrate solution, nickel foam is used as the cathode, and platinum is used as the anode. 1M / L ammonium chloride and 1M / L ammonia water are complexing agents, and sodium hydroxide solution is used to adjust the pH to 10 at 1mA / cm 2 Constant current electrolysis for 5 hours, electrolysis at 50° C., to obtain the positive electrode material deposited on the nickel foam.

[0056] (2) Conductive material coating:

[0057] In the electrolytic cell, graphite and nickel foam deposited with positive electrode materials are use...

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Abstract

The invention discloses a preparation method of a modified nickel hydroxide positive electrode material. The preparation method comprises the following steps: 1, obtaining a positive electrode through an electrochemical method or a chemical coprecipitation method; and 2, coating the positive electrode with the conductive material through an electrochemical method or a solid-phase polymerization method. The positive electrode material prepared by the method has the characteristics of high conductivity, excellent cycle performance, high capacity, high magnification and the like.

Description

technical field [0001] The invention relates to the technical field of alkaline battery manufacture, in particular to a preparation method of a modified nickel hydroxide cathode material. Background technique [0002] With the progress and development of human society, energy is becoming more and more important, and energy security has become the security guarantee of the national economy. The increasing consumption of traditional non-renewable energy has obviously been unable to meet the needs of social development, so it is imminent to find a high-efficiency energy. Chemical power sources have significant advantages. A chemical power source is a device that converts chemical energy generated by a chemical reaction into electrical energy, which can store and release electrical energy. [0003] At present, the widely used chemical power sources include lithium-ion batteries, lead-acid batteries, fuel cells, nickel-cadmium batteries, and nickel-metal hydride batteries. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04H01M4/36H01M4/52H01M4/62
CPCC01G53/04H01M4/366H01M4/52H01M4/624H01M4/628C01P2006/40H01M2004/021H01M2004/028Y02E60/10
Inventor 周翔晁流
Owner 南京安捷驰新能源科技有限公司
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