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Method for preparing nanometer flower-shaped hydrogen-oxygen-zinc sulfate used as anode material of nickel/zinc battery

A positive electrode material, zinc battery technology, applied in the direction of battery electrodes, alkaline storage battery electrodes, circuits, etc., can solve the problems of no stable and reliable preparation methods, and achieve good application prospects, mild reaction, stability and improved efficiency Effect

Inactive Publication Date: 2010-08-25
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nano flower-shaped structure can provide sufficient internal surface area due to the random distribution of branches, and provide good electrical transmission through good contact with the

Method used

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  • Method for preparing nanometer flower-shaped hydrogen-oxygen-zinc sulfate used as anode material of nickel/zinc battery
  • Method for preparing nanometer flower-shaped hydrogen-oxygen-zinc sulfate used as anode material of nickel/zinc battery
  • Method for preparing nanometer flower-shaped hydrogen-oxygen-zinc sulfate used as anode material of nickel/zinc battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The specific approach in this example is:

[0026] a. Prepare mixed solution

[0027] The concentration of preparation sodium thiosulfate is the mixed solution that the concentration of 0.095mol / L, zinc nitrate hexahydrate is 0.00625mol / L, the concentration of hexamethylenetetramine is 0.00625mol / L;

[0028] b. Stand still

[0029] The mixed solution was left to stand for 31 days to form a flower-shaped nanostructured zinc hydroxide precipitate;

[0030] c. drying

[0031] Dry the precipitate in step b at 80°C.

[0032] Fig. 1 is the X-ray diffraction pattern (XRD) of the flower-shaped nanostructure zinc oxysulfate prepared by the embodiment of the present invention, Fig. 1 shows, the PDF (powder diffraction file) of the diffraction peak of the prepared flower-shaped nanostructure and zinc oxysulfate The standard card (No.00-039-0688) is the same, which is the phase of zinc hydroxide sulfate. Figure 2 is an EDAX (energy dispersive analysis of X-rays) diagram, as ca...

Embodiment 2

[0035] The specific approach in this example is:

[0036] a. Prepare mixed solution

[0037] The concentration of preparing sodium thiosulfate is 0.07mol / L, the concentration of zinc nitrate hexahydrate is 0.0125mol / L, and the concentration of hexamethylenetetramine is a mixed solution of 0.0125mol / L;

[0038] b. Stand still

[0039] The mixed solution is left to stand for 12 days, and the zinc hydroxide sulfate precipitation of the flower-shaped nanostructure is formed;

[0040] c. drying

[0041] Dry the precipitate in step b at 70°C.

[0042] Fig. 5 is a scanning electron micrograph of the flower-shaped nanostructured zinc hydroxide sulfate prepared in Example 2 of the present invention. It can be seen from Figure 5 that the prepared zinc oxyhydrogen sulfate is assembled into a micron flower-shaped structure by very thin nanosheets. The thickness of the nanosheets in the flower-shaped structure is about 100 nm, and the scale of the flower is 10 μm.

Embodiment 3

[0044] The specific approach in this example is:

[0045] a. Prepare mixed solution

[0046] The concentration of preparing sodium thiosulfate is 0.02mol / L, the concentration of zinc nitrate hexahydrate is 0.01mol / L, and the concentration of hexamethylenetetramine is a mixed solution of 0.01mol / L;

[0047] b. Stand still

[0048] The mixed solution was left to stand for 23 days to form a flower-shaped nanostructured zinc hydroxide precipitation;

[0049] c. drying

[0050] Dry the precipitate in step b at 60°C.

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Abstract

The invention provides a method for preparing nanometer flower-shaped hydrogen-oxygen-zinc sulfate used as an anode material of a nickel/zinc battery. The method particularly comprises the following steps of: a, preparing mixed solution, wherein in the mixed solution, the concentration of sodium thiosulfate is 0.02 to 0.095mol/L, the concentration of zinc nitrate hexahydrate is 0.00625 to 0.0125mol/L, and the concentration of hexamethylene tetramine is 0.00625 to 0.0125mol/L; standing the mixed solution for 12 to 31 days to obtain the hydrogen-oxygen-zinc sulfate precipitate with a flower-shaped nanometer structure; and c, drying the precipitate obtained by the step b at the temperature of between 0 and 80 DEG C to obtain the finished product. The hydrogen-oxygen-zinc sulfate prepared by the method has a nanometer flower-shaped structure, and when used as the anode material of the nickel/zinc battery, the hydrogen-oxygen-zinc sulfate can improve the stability and the efficiency of the battery.

Description

technical field [0001] The invention relates to a preparation method of zinc hydrogen oxysulfate used as a positive electrode material of a nickel / zinc battery. Background technique [0002] Nickel / zinc batteries have better performance than lead-acid batteries and nickel / iron batteries. Since this type of battery is a sealed battery, it is often accompanied by H 2 with O 2 If it is not recombined in time, it will lead to an increase in the internal pressure of the battery, which will lead to the phenomenon of "flatulence". Practice has shown that when using cathode control, adding excess ZnO to the anode can avoid excessive hydrogen generation during charging, prevent battery inflation, and maintain good electrical performance and cycle life of the battery. However, affected by the large solubility of ZnO in the electrolyte (KOH), the biggest problem of this type of battery is the cycle life. The researchers found that introducing anionic groups such as PO into the elec...

Claims

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Application Information

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IPC IPC(8): H01M4/26H01M4/58
CPCY02E60/124Y02E60/10
Inventor 杨峰赵勇
Owner SOUTHWEST JIAOTONG UNIV