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Long-life zinc-nickel battery and preparation method thereof

A zinc-nickel battery and electrode technology, which is applied in the field of long-life zinc-nickel battery and its preparation, can solve the problems of zinc sheet reducing material utilization, cycle life limitation, unfavorable charge transmission, etc., to achieve cycle stability improvement and battery life extension , The effect of extending battery life

Pending Publication Date: 2020-07-03
湖南源达新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to problems such as dendrites, passivation, and deformation of the zinc electrode during the working process of the battery, the practical application of the zinc-nickel battery is limited by its cycle life.
Moreover, the negative electrode of the traditional zinc-nickel battery is based on a zinc sheet with a rigid structure, which reduces the material utilization rate and affects the energy density and capacity of the battery.
The traditional zinc-nickel battery positive electrode uses commercial spherical Ni(OH) 2 , there are problems such as large particle size and insufficient exposure of active materials, and the preparation of electrodes by physical mixing methods such as binders is not conducive to the transmission of charges between active materials

Method used

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  • Long-life zinc-nickel battery and preparation method thereof
  • Long-life zinc-nickel battery and preparation method thereof
  • Long-life zinc-nickel battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]This embodiment relates to a long-life zinc-nickel battery and a preparation method thereof, and the specific steps are as follows:

[0041] 1. Preparation of PAM-sodium alginate polymer electrolyte with high conductivity and high water retention

[0042] making process:

[0043] Step 1: Add 0.65 g of sodium alginate to 25 ml of deionized water (18.2 MΩcm) to prepare a 0.026 g / ml sodium alginate solution. At 30°C, stir magnetically for 50 min until completely dissolved.

[0044] Step 2: Add 3.5g of acrylamide, 1.75mg of N,N'-methyleneamide, and 0.035g of potassium persulfate to the above solution, and stir magnetically at 40°C for 3h. Wherein the concentration of acrylamide is 0.14g / ml, the concentration of N, N'-methyleneamide is 0.07mg / ml, and the concentration of potassium persulfate is 1.2mg / ml. N, N'-methylene amide was used as the adhesive, and potassium persulfate was used as the initiator.

[0045] The third step: the nitrogen gas was continuously passed into...

Embodiment 2

[0067] This embodiment relates to a long-life zinc-nickel battery and a preparation method thereof, and the specific steps are as follows:

[0068] 1. Preparation of PAM-sodium alginate polymer electrolyte with high conductivity and high water retention

[0069] making process:

[0070] Step 1: Add 0.5 g of sodium alginate to 20 ml of deionized water (18.2 MΩcm) to prepare a 0.025 g / ml sodium alginate solution. At 25°C, stir magnetically for 60 min until completely dissolved.

[0071] Step 2: Add 2g of acrylamide, 1.2mg of N,N'-methyleneamide, and 0.02g of potassium persulfate to the above solution, and stir magnetically at 25°C for 2h. Wherein the concentration of acrylamide is 0.1g / ml, the concentration of N, N'-methyleneamide is 0.06mg / ml, and the concentration of potassium persulfate is 1mg / ml. N, N'-methylene amide was used as the adhesive, and potassium persulfate was used as the initiator.

[0072] The third step: the nitrogen gas was continuously passed into the ab...

Embodiment 3

[0094] This embodiment relates to a long-life zinc-nickel battery and a preparation method thereof, and the specific steps are as follows:

[0095] 1. Preparation of PAM-sodium alginate polymer electrolyte with high conductivity and high water retention

[0096] making process:

[0097] Step 1: Add 0.8 g of sodium alginate to 20 ml of deionized water (18.2 MΩcm) to prepare a 0.04 g / ml sodium alginate solution. At 40°C, stir magnetically for 60 min until completely dissolved.

[0098] Step 2: Add 4g of acrylamide, 2.4mg of N,N'-methyleneamide, and 0.04g of potassium persulfate to the above solution, and stir magnetically at 40°C for 3h. Wherein the concentration of acrylamide is 0.2g / ml, the concentration of N, N'-methyleneamide is 1.2mg / ml, and the concentration of potassium persulfate is 2mg / ml. N, N'-methylene amide was used as the adhesive, and potassium persulfate was used as the initiator.

[0099] The third step: the nitrogen gas was continuously passed into the abov...

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Abstract

The invention discloses a zinc-nickel battery with long service life and a preparation method thereof. The preparation method comprises the following steps: putting foamed nickel into a clear solutionprepared from Ni (NO3) 2.6 H2O, hexamethylphosphoramide, functionalized CNT and ammonia water, reacting at 80-90 DEG C for 20-24 hours, and growing Ni (OH) 2 / CNT on a foamed nickel substrate to obtain a nickel electrode; by taking a zinc foil as a working electrode and a Co3O4 electrode as a counter electrode, carrying out electro-deposition in an electrolyte containing KOH and Zn (CH3COO) 2 to prepare a porous zinc electrode; by taking a nickel electrode as a positive electrode, and a porous zinc electrode as a negative electrode, separating the two electrodes by a PAM-sodium alginate polymer electrolyte, and assembling the zinc-nickel battery. According to the invention, the gel electrolyte with high ionic conductivity and water retention performance, the ultrathin nickel positive electrode with high surface area and conductivity and the porous zinc electrode are adopted; the stability of the battery is remarkably improved and the service life of the battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of zinc-nickel batteries, and in particular relates to a long-life zinc-nickel battery and a preparation method thereof. Background technique [0002] As a new type of secondary battery, zinc-nickel battery has the advantages of high working voltage, high energy density, low cost, and environmental friendliness. It is a clean, efficient, and sustainable energy device. It is widely used in electronic equipment and electric vehicles. It has a good application prospect. However, due to problems such as dendrites, passivation, and deformation of the zinc electrode during the working process of the battery, the practical application of the zinc-nickel battery is limited by its cycle life. Moreover, the negative electrode of the traditional zinc-nickel battery is based on a zinc sheet with a rigid structure, which reduces the material utilization rate and affects the energy density and capacity of the battery. T...

Claims

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Application Information

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IPC IPC(8): H01M10/30H01M4/38H01M4/42H01M4/485H01M4/62H01M10/0565H01M10/42C01B32/158
CPCH01M10/30H01M10/0565H01M10/4235H01M4/42H01M4/38H01M4/485H01M4/625C01B32/158Y02E60/10
Inventor 钟澄宋永江
Owner 湖南源达新材料有限公司
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