A kind of preparation method of positive electrode of zinc-nickel battery with high specific energy

A zinc-nickel battery and energy technology, which is applied to nickel batteries, battery electrodes, alkaline battery electrodes, etc., can solve the problems of uneven current distribution, low utilization rate of active materials, and loose bonding, and improve the charging acceptance capacity. , The effect of reducing softening and falling off and reducing internal resistance

Active Publication Date: 2021-10-26
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art that the above-mentioned high specific energy iron battery active material is not closely bonded to the matrix, the utilization rate of the active material is low, the stability is poor, and the battery current distribution is uneven, the present invention provides a method for improving the high specific energy iron battery. The cycle life and charge-discharge conversion efficiency of energy zinc-nickel battery and the preparation method of positive electrode of high specific energy zinc-nickel battery to avoid early decay of battery capacity

Method used

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  • A kind of preparation method of positive electrode of zinc-nickel battery with high specific energy
  • A kind of preparation method of positive electrode of zinc-nickel battery with high specific energy

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Embodiment 1

[0036] A method for preparing a positive electrode of a high specific energy zinc-nickel battery, comprising the following steps:

[0037] a) Mix raw material A with thickener to prepare slurry A. Raw material A is composed of active material and conductive agent; the thickener is methyl cellulose, and the active material is Ni(OH) 2 , the conductive agent is polyacetylene; the weight ratio of the conductive agent to the active material is 0.8:100, and the amount of the thickener added is 0.5wt% of the sum of the weight of the conductive agent and the active material;

[0038] b) NiCl 2 Dissolve in water to produce 0.1mol / L NiCl 2 solution, stirred at 600rpm for 8 minutes, added slurry A and NiCl 2 Solution weight 0.2wt% naphthalenesulfonic acid formaldehyde condensate, continue to stir 5 minutes with the rotating speed of 800rpm, make slurry B; Slurry A and NiCl 2 The weight ratio of the solution is 2:1;

[0039] c) Add polytetrafluoroethylene to slurry B, stir at 40°C fo...

Embodiment 2

[0043] A method for preparing a positive electrode of a high specific energy zinc-nickel battery, comprising the following steps:

[0044] a) Mix raw material A with thickener to prepare slurry A. Raw material A is composed of active material and conductive agent; the thickener is hydroxypropyl methylcellulose, and the active material is Ni(OH) 2 , the conductive agent is polythiophene; the weight ratio of the conductive agent to the active material is 0.8:85, and the amount of the thickener added is 0.5wt% of the sum of the weight of the conductive agent and the active material;

[0045] b) NiCl 2Dissolve in water to produce 0.1mol / L NiCl 2 solution, stirred at 600rpm for 3 minutes, added slurry A and NiCl 2 Solution weight 0.25wt% naphthalenesulfonic acid formaldehyde condensate, continue to stir 5 minutes with the rotating speed of 600rpm, make slurry B; Slurry A and NiCl 2 The weight ratio of the solution is 2:1.2;

[0046] c) Add polytetrafluoroethylene to slurry B, s...

Embodiment 3

[0050] A method for preparing a positive electrode of a high specific energy zinc-nickel battery, comprising the following steps:

[0051] a) Mix raw material A with thickener to prepare slurry A. Raw material A is composed of active material and conductive agent; the thickener is sodium carboxymethyl cellulose, and the active material is Ni(OH) 2 Composite material, the conductive agent is polypyrrole; the weight ratio of the conductive agent to the active material is 2:150, and the addition amount of the thickener is 1.2wt% of the sum of the weight of the conductive agent and the active material;

[0052] b) NiCl 2 Dissolve in water to produce 1mol / L NiCl 2 solution, stirred at 800rpm for 10 minutes, added slurry A and NiCl 2 Solution weight 0.5wt% naphthalenesulfonic acid formaldehyde condensate, continue to stir with the rotating speed of 700rpm 15 minutes, make slurry B; Slurry A and NiCl 2 The weight ratio of the solution is 2:1.3;

[0053] c) Add polytetrafluoroethy...

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Abstract

The invention belongs to the technical field of zinc-nickel batteries. The invention discloses a method for preparing a positive electrode of a high specific energy zinc-nickel battery, which comprises uniformly mixing raw material A and a thickener to prepare a slurry A, dissolving a divalent nickel compound in water to prepare an aqueous solution, adding the slurry A and Surfactant, stirring treatment to prepare slurry B, adding polytetrafluoroethylene to slurry B to prepare positive electrode slurry, putting the positive electrode base into the positive electrode slurry until it is completely submerged, taking it out after standing for a period of time, and making The positive electrode sheet of the battery is obtained, and the positive electrode of the zinc-nickel battery with high specific energy is obtained through post-processing. The invention can solve the problem that the positive electrode active materials of the high specific energy zinc-nickel battery are not tightly bonded, can reduce the softening and falling off of the positive electrode active material, can reduce internal resistance, improve the utilization rate of the active material, improve the charging acceptance capacity of the electrode, increase the battery capacity, Cycle life and charge-discharge conversion efficiency avoid early decay of battery capacity.

Description

technical field [0001] The invention relates to the technical field of zinc-nickel batteries, in particular to a method for preparing a positive electrode of a high-specific energy zinc-nickel battery. Background technique [0002] In 1859, the French physicist Gaston Plante invented the lead-acid battery. Driven by the development of the automobile, transportation and communication industries, the production capacity of the lead-acid battery has developed rapidly because of its high safety, stable performance, and low manufacturing cost. And it has the characteristics of high recycling value, which makes it widely used in the national economy and people's life. [0003] With the development and progress of science and technology, and the increase in the contribution of electric vehicles to vehicle drive, the demand for battery energy has increased significantly. In particular, full hybrid and plug-in hybrid vehicles have put forward stricter standards for battery energy. Le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/28H01M4/36H01M4/52H01M4/62H01M10/30
CPCH01M4/28H01M4/364H01M4/523H01M4/624H01M4/628H01M10/30H01M2004/028Y02E60/10
Inventor 柯娃吴亮朱军平马永泉刘孝伟
Owner CHAOWEI POWER CO LTD
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