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Method for using anionic zinc houghite for preparing zinc cathode of zinc-nickel secondary battery

An anion-type, secondary battery technology, applied in battery electrodes, alkaline battery electrodes, circuits, etc., can solve problems such as reducing the capacity of zinc oxide, achieve the effects of improving electrochemical performance, improving dendrite deformation, and improving electrical contact

Inactive Publication Date: 2013-09-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this active material is that it greatly reduces the capacity of zinc oxide.

Method used

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  • Method for using anionic zinc houghite for preparing zinc cathode of zinc-nickel secondary battery
  • Method for using anionic zinc houghite for preparing zinc cathode of zinc-nickel secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The analytical pure zinc nitrate of 7.72 weight parts and the analytical pure copper nitrate of 1.26 weight parts are dissolved in the deionized water of 100 weight parts, the analytical pure aluminum nitrate of 3.75 weight parts is dissolved in the deionized water of 100 weight parts, will The above two solutions are mixed uniformly to form a salt solution. 3.2 parts by weight of sodium hydroxide and 2.12 parts by weight of sodium carbonate were dissolved in 50 parts by weight of deionized water to form an alkaline solution. Under strong mechanical stirring, slowly add the salt solution and alkali solution dropwise into 50 parts by weight of deionized water, control the pH of the solution to 10.0, continue to stir for 80 minutes, age for 20 hours, and finally filter and wash the precipitate. Dry at 60°C for 4 hours to obtain carbonate-type zinc-copper-aluminum hydrotalcite (m 2+ / M 3+= 3:1) samples. 4.9 parts by weight of the sample was prepared into a hydrotalcite ...

Embodiment 2

[0031] The analytical pure zinc nitrate of 10.69 weight parts and the analytical pure copper nitrate of 1.26 weight parts are dissolved in the deionized water of 100 weight parts, the analytical pure aluminum nitrate of 3.75 weight parts is dissolved in the deionized water of 100 weight parts, Mix the above two solutions evenly to form a salt solution. 5.60 parts by weight of potassium hydroxide and 2.76 parts by weight of potassium carbonate were dissolved in 50 parts by weight of deionized water to form an alkaline solution. Under strong mechanical stirring, slowly add the salt solution and the alkali solution dropwise into 50 parts by weight of deionized water, control the pH of the solution to 10.0, continue to stir for 100 minutes, age for 20 hours, and finally filter and wash the precipitate. Dry at 60°C for 4 hours to obtain carbonate-type zinc-copper-aluminum hydrotalcite (M 2+ / M 3+ = 4:1) samples. 4.9 parts by weight of the sample was prepared into a hydrotalcite ...

Embodiment 3

[0033] The analytical pure zinc nitrate of 13.66 weight parts and the analytical pure copper nitrate of 1.26 weight parts are dissolved in the deionized water of 100 weight parts, the analytical pure aluminum nitrate of 3.75 weight parts is dissolved in the deionized water of 100 weight parts, Mix the above two solutions evenly to form a salt solution. 6.72 parts by weight of potassium hydroxide and 2.76 parts by weight of potassium carbonate were dissolved in 50 parts by weight of deionized water to form an alkaline solution. Under strong mechanical stirring, slowly add the alkaline solution and the alkaline solution dropwise into 50 parts by weight of deionized water, control the pH of the solution to 10.0, continue to stir for 120 minutes, age for 20 hours, and finally filter and wash the precipitate. Dry at 60°C for 4 hours to obtain carbonate-type zinc-copper-aluminum hydrotalcite (M 2+ / M 3+ =5:1) samples. 4.9 parts by weight of the sample was prepared into a hydrotal...

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Abstract

The invention discloses a method for using an anionic zinc houghite for preparing a zinc cathode of a zinc-nickel secondary battery. The method comprises the following steps: (1) mechanically mixing 65-85 parts by weight of anionic zinc houghite, 5-10 parts by weight of conductive agent and 10-30 parts by weight of other zinc compounds to obtain a cathode material mixture; (2) adding a dispersing agent aqueous solution into the cathode material mixture obtained in the step (1), and then adding an adhesion agent while violently stirring, thereby obtaining uniform liquid zinc cathode slurry; and (3) uniformly coating the zinc cathode slurry acquired in the step (2) on two sides of a zinc electrode current collector, drying the two sides, and then cutting the zinc electrode current collector, thereby acquiring an end product of a zinc cathode plate. The method provided by the invention is characterized in that the anionic zinc houghite is firstly used for preparing the zinc cathode of the zinc-nickel secondary battery. The method provided by the invention can be used for weakening the deformation of the zinc cathode, restraining the solution of active materials of the zinc electrode and promoting the reversibility and the cycle life of the zinc-nickel secondary battery.

Description

technical field [0001] The invention belongs to the field of batteries and their applications, and relates to the application of an anionic zinc-based hydrotalcite in the preparation of zinc negative electrodes for zinc-nickel secondary batteries. Background technique [0002] Alkaline zinc-nickel secondary batteries have the characteristics of large specific energy, high specific power, stable working voltage, and low price. However, problems such as deformation and dendrites of the active material zinc are the key points that limit the widespread development of this battery. The main cause of these problems is the dissolution of active substances in the alkaline electrolyte. During the charging process, the active material zinc deposition is not uniform, which will lead to the current density gradient, which will cause the deformation and dendrite of zinc. Aiming at this problem, people have done a lot of research on the improvement of zinc anode. It is mainly to add add...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/52H01M4/32
CPCY02E60/124Y02E60/10
Inventor 杨占红范鑫铭温润娟谭志勇龙伟殷晶莉陈红燕赵志远
Owner CENT SOUTH UNIV
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