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Zinc-nickel battery negative electrode material

A negative electrode material, zinc-nickel battery technology, applied in the field of energy storage, can solve the problems of unsuitable lithium-ion battery negative electrode materials, inability to intercalate and deintercalate lithium ions, and decline in the utilization rate of zinc oxide, and achieve excellent electrochemical performance. The effect of stable and reliable process conditions and mild reaction conditions

Active Publication Date: 2017-05-17
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Zinc-nickel battery negative electrode material

Examples

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Effect test

Embodiment 1

[0036] The basic zinc carbonate / carbon composite material prepared by embodiment 1, urea

[0037] Weigh 100 mg of carbon material (carbon nanotubes, carbon fibers, conductive carbon black or graphene), add it to 50 mL of water for ultrasonic dispersion for 30 min, and then add 1 g of divalent zinc salt (ZnCl 2 ) after fully dissolved by stirring, continue ultrasonic dispersion for 10min; weigh a certain amount of urea (1.32g, 1.50g or 1.77g) and dissolve it in 30mL water; The reaction was continued for 12 h under magnetic stirring in an oil bath. After the reaction is completed, filter, wash with deionized water until neutral, and dry at 50°C to obtain the basic zinc carbonate / carbon composite material.

[0038] The electron micrograph and XRD figure of the prepared basic zinc carbonate / carbon composite material are as attached figure 1 And attached image 3 shown.

Embodiment 2

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

[0040] Weigh 100 mg of carbon material (carbon nanotubes, carbon fibers, conductive carbon black or graphene), add it to 50 mL of water for ultrasonic dispersion for 30 min, and then add 1 g of ZnSO 4 Continue to ultrasonically disperse for 10 minutes after stirring to fully dissolve; weigh a certain amount of ammonium bicarbonate (0.92, 1.0g or 1.05g) and add 15mL 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. After the reaction was completed, it was filtered, washed with deionized water until neutral, and dried at 50°C to obtain the basic zinc carbonate / carbon composite material.

[0041] The electron micrograph and XRD figure of the prepare...

Embodiment 3

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

[0043] Basic zinc carbonate / carbon composite material, calcium hydroxide, bismuth oxide, binder PTFE (0.1%wt water suspension) are mixed in a ratio of 92:1:3:4, adjusted into a paste, and applied Based on 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. A basic zinc carbonate and carbon composite material is taken as a zinc-nickel battery negative electrode active substance, and a zinc-nickel battery negative electrode containing the basic zinc carbonate and carbon composite material and an Ni positive electrode are prepared to construct a soft package NiZn battery. The test result indicates that the overall electrochemical performance of the electrode and the battery containing the material is improved when the material is taken as the battery negative electrode material for use. The prepared soft package battery has the advantages of high energy density, coulombic efficiency and long cycle life.

Description

technical field [0001] The invention belongs to the technical field of energy storage, in particular to a zinc-nickel battery negative electrode material. Background technique [0002] Zinc-nickel secondary battery has the characteristics of high energy density, high power density, high working voltage, wide working temperature, no memory effect, etc. It is a green and 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 service life of the battery and restrict the development of zinc-nickel secondary batteries. [0003] The traditional zinc-nickel battery negative electrode preparation is to prepare ZnO, zinc powder, conductive agent and binder to make a slurry, and paste the slurry on foamed copper or copper grid to form an electrode. During charging, zinc dendrites are generated. The growth of zinc dendrites causes the active material to fall off fr...

Claims

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Application Information

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Patent Type & Authority Applications(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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