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High-energy-density zinc-nickel battery positive electrode manufacturing method

A zinc-nickel battery and battery positive electrode technology, which is applied to battery electrodes, nickel batteries, alkaline battery electrodes, etc., can solve the problems of uneven battery current distribution, low utilization rate of active materials, and loose combination, so as to improve charging acceptance. ability, reduce softening and shedding, and reduce the effect of internal resistance

Active Publication Date: 2019-03-29
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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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 the raw material A and the thickener evenly to prepare the slurry A. The raw material A is composed of an active material and a conductive agent; the thickening agent is methyl cellulose, and the active material is Ni(OH) 2 , the conductive agent is polyacetylene; the weight ratio of the conductive agent and the active material is 0.8:100, and the addition amount of the thickener is 0.5wt% of the sum of the weight of the conductive agent and the active material;

[0038] b) The NiCl 2 Dissolved in water to obtain 0.1mol / L NiCl 2 The solution was stirred at 600 rpm for 8 minutes, and slurry A and NiCl were added. 2 The solution weight of 0.2wt% naphthalenesulfonic acid formaldehyde condensate, continue to stir at 800rpm for 5 minutes to prepare slurry B; slurry A and NiCl 2 The weight ratio of the solution is 2:1;

[0039] c) Add ...

Embodiment 2

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

[0044] a) Mixing raw material A and thickening agent uniformly to obtain slurry A, raw material A is composed of active material and conductive agent; thickening agent is hydroxypropyl methylcellulose, and active material is Ni(OH) 2 , the conductive agent is polythiophene; the weight ratio of the conductive agent and the active material is 0.8:85, and the addition amount of the thickener is 0.5wt% of the sum of the weight of the conductive agent and the active material;

[0045] b) The NiCl 2Dissolved in water to obtain 0.1mol / L NiCl 2 The solution was stirred at 600 rpm for 3 minutes, and slurry A and NiCl were added. 2 The solution weight of 0.25wt% naphthalenesulfonic acid formaldehyde condensate, continue to stir at 600rpm for 5 minutes to prepare slurry B; slurry A and NiCl 2 The weight ratio of the solution is 2:1.2;

[0046] c) Add pol...

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 the raw material A and the thickener evenly to prepare the slurry A. The raw material A is composed of an active material and a conductive agent; the thickening agent is sodium carboxymethyl cellulose, and the active material is Ni(OH) 2 The composite material, the conductive agent is polypyrrole; the weight ratio of the conductive agent and 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) The NiCl 2 Dissolved in water to obtain 1mol / L NiCl 2 The solution was stirred at 800 rpm for 10 minutes, and slurry A and NiCl were added. 2 The solution weight of 0.5wt% naphthalenesulfonic acid formaldehyde condensate, continue to stir at 700rpm for 15 minutes to prepare slurry B; slurry A and NiCl 2 The weight ratio of the so...

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Abstract

The invention belongs to the technical field of zinc-nickel batteries. The invention discloses a high-energy-density zinc-nickel battery positive electrode manufacturing method. The method comprises:adding a thickner to a raw material A, mixing uniformly, to obtain a slurry A, dissolving a divalent nickel compound in water to obtain an aqueous solution, adding the slurry A and a surfactant, stirring and treating to obtain a slurry B, adding polytetrafluoroethylene to the slurry B, to prepare a positive electrode slurry, putting a positive electrode matrix into the positive electrode slurry until the positive electrode matrix is completely submerged, and then taking the positive electrode matrix out after a period, preparing a battery positive electrode piece, and performing aftertreatmentto obtain a high-energy-density zinc-nickel battery positive electrode. The method can solve a problem that high-energy-density zinc-nickel battery positive electrode active materials are not tightlycombined, and can reduce softening and shedding of the positive electrode active materials, reduce internal resistance, improve utilization ratio of the active materials, improve charging acceptanceof the electrode, and improve battery capacity, cycle life and charge and discharge conversion efficiency, to prevent 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, French physicist Gaston Plante invented the lead-acid battery. Driven by the development of the automobile, transportation and communication industries, the production capacity of lead-acid batteries 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 contribution of electric vehicles to vehicle driving has increased, the demand for battery energy has increased significantly, especially full hybrid and plug-in hybrid vehicles have put forward stricter standards for battery energy, and lead-aci...

Claims

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Application Information

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Patent Type & Authority Applications(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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