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A kind of negative electrode material of zinc-nickel battery

A negative electrode material, technology of zinc-nickel battery, applied in the direction of nickel battery, battery electrode, alkaline battery, etc., can solve the problem of inability to perform lithium ion intercalation and deintercalation, unsuitable negative electrode material for lithium ion battery, and reduced utilization rate of zinc oxide, etc. problems, to achieve the effects of excellent electrochemical performance, stable and reliable process conditions, and mild reaction conditions

Active Publication Date: 2019-05-07
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result of the deformation, the specific surface area of ​​the electrode decreases, the real working current density increases, and the overpotential increases, resulting in a decrease in the utilization rate of zinc oxide, a decrease in the capacity of the zinc electrode, and a decrease in the life of the zinc-nickel battery.
[0004] Patent CN104993106A discloses a preparation method and application of basic zinc carbonate, a zinc-based composite material. The preparation material is obtained by hydrothermal reaction of zinc acetate, sodium fluoride and hexamethylenetetramine. It is considered to be useful in lithium-ion batteries. Potential application, but the charge-discharge curve of the battery it gives shows that its discharge platform is at 0.6V, while that of lithium-ion batteries is at 3.2-3.7V, and basic zinc carbonate does not have a graphite-like layered structure, so it cannot be Intercalation and deintercalation of lithium ions, so basic zinc carbonate is not suitable as an anode material for lithium ion batteries

Method used

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  • A kind of negative electrode material of zinc-nickel battery
  • A kind of negative electrode material of zinc-nickel battery
  • A kind of negative electrode material of zinc-nickel battery

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1, the basic zinc carbonate / carbon composite material prepared by urea

[0037] Weigh 100mg of carbon material (carbon nanotubes, carbon fibers, conductive carbon black or graphene), add it to 50mL of water and ultrasonically disperse it for 30min, then add 1g of divalent zinc salt (ZnCl 2 ) Continue to ultrasonically disperse for 10 min after stirring to fully dissolve; take a certain amount of urea (1.32g, 1.50g or 1.77g) and dissolve it in 30mL of water; stir and mix the above two solutions evenly, add a stirrer to seal, and place it at 90°C The reaction was continued for 12 h under magnetic stirring in an oil bath. After the reaction, the basic zinc carbonate / carbon composite material is obtained by filtering, washing with deionized water until neutral, and drying at 50°C.

[0038] The electron microscope and XRD patterns of the prepared basic zinc carbonate / carbon composite are shown in the attached figure 1 and attached image 3 shown.

Embodiment 2

[0039] Embodiment 2, the basic zinc carbonate / carbon composite material prepared by ammonium bicarbonate

[0040] Weigh 100mg of carbon material (carbon nanotube, carbon fiber, conductive carbon black or graphene), add it to 50mL of water and ultrasonically disperse it for 30min, add 1g of ZnSO to it 4 Continue to ultrasonically disperse for 10 min after stirring to dissolve fully; weigh a certain amount of ammonium bicarbonate (0.92, 1.0 g or 1.05 g) and add 15 mL of water to fully dissolve; place the mixed solution in an oil bath at 60°C and stir magnetically at the same time. The prepared ammonium bicarbonate solution was slowly added dropwise to the mixed solution. After the dropwise addition, the reaction was continued for two hours, and after the reaction was completed, the basic zinc carbonate / carbon composite material was obtained by filtering, washing with deionized water until neutral, and drying at 50°C.

[0041] The electron microscope and XRD patterns of the prep...

Embodiment 3

[0042] Embodiment 3, the preparation method of the negative electrode sheet of basic zinc carbonate / carbon composite material as active material

[0043] Basic zinc carbonate / carbon composite material, calcium hydroxide, bismuth oxide, binder PTFE (suspension of 0.1%wt water) were mixed in a ratio of 92:1:3:4, adjusted to paste, and coated On the brass mesh or three-dimensional tinned copper mesh, drying, pressing and cutting to obtain the negative electrode sheet.

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Abstract

The invention discloses a zinc-nickel battery negative electrode material. The invention uses an alkaline zinc carbonate / carbon composite material as the negative electrode active material of the zinc-nickel battery to prepare a zinc-nickel battery negative electrode and a Ni positive electrode structure containing the alkaline zinc carbonate / carbon composite material. Into a soft NiZn battery. The test results show that when the material is used as a battery negative electrode material, the overall electrochemical performance of the electrode and the battery containing the material is improved. The prepared pouch battery has high energy density, Coulombic efficiency and long cycle life.

Description

technical field [0001] The invention belongs to the technical field of energy storage, and particularly relates to a negative electrode material of a zinc-nickel battery. Background technique [0002] Zinc-nickel secondary battery has the characteristics of high energy density, high power density, high operating voltage, wide operating temperature, no memory effect, etc. It is a green and environmentally friendly high-performance secondary battery. However, the deformation of the negative electrode and the growth of zinc dendrites during the charging and discharging process shorten the battery life and restrict the development of zinc-nickel secondary batteries. [0003] The traditional preparation of the negative electrode of zinc-nickel battery is to prepare a slurry of ZnO, zinc powder, conductive agent and binder, and apply the slurry to the foam copper or copper grid and press it into an electrode. During the charging process, zinc dendrites are generated. The growth ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/60H01M4/62H01M10/30
CPCH01M4/364H01M4/587H01M4/60H01M4/62H01M10/30Y02E60/10
Inventor 关明云汪冬明黄茂站顾德亮
Owner JIANGSU UNIV OF TECH
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