A kind of preparation method of nickel-cobalt carbon nanotube airgel zinc-air battery catalyst

A carbon nanotube, zinc-air battery technology, applied in chemical instruments and methods, physical/chemical process catalysts, battery electrodes, etc., can solve the problems of high price, potential safety hazards in lithium cobalt oxide batteries, and lack of cobalt resources. Good stability, ultra-fine particles and high activity

Active Publication Date: 2019-08-02
XINXIANG MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium cobalt oxide is currently the most widely used battery material, but cobalt resources are increasingly scarce and expensive, and there are safety hazards in the use of lithium cobalt oxide batteries

Method used

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  • A kind of preparation method of nickel-cobalt carbon nanotube airgel zinc-air battery catalyst

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Embodiment 1

[0020] A method for preparing a nickel-cobalt carbon nanotube airgel zinc-air battery catalyst, the specific steps of the preparation method of the nickel-cobalt / carbon nanotube airgel zinc-air battery catalyst are as follows:

[0021] S1: Add ammonia water dropwise to the 0.2mol / l metal nickel solution under strong stirring at room temperature, stop adding ammonia water when the pH value of the mixed solution is 7.5, and use the displacement precipitation method to dissolve the metal nickel solution into the solution before the reaction. filter out impurities;

[0022] S2: Add dropwise 0.2mol / l cobalt nitrate solution and ammonia water to the mixed solution at the same time, and stir for 15 minutes;

[0023] S3: adding ammonia water dropwise to maintain the pH value of the mixed solution at 8.5, and stirring and standing still, a hydrogel is formed in the mixed solution, and the stirring and standing time are each 3 hours;

[0024] S4: Use absolute ethanol to replace the wat...

Embodiment 2

[0029] A method for preparing a nickel-cobalt carbon nanotube airgel zinc-air battery catalyst, the specific steps of the preparation method of the nickel-cobalt / carbon nanotube airgel zinc-air battery catalyst are as follows:

[0030] S1: Add ammonia water dropwise to the 0.4mol / l metal nickel solution under strong stirring at room temperature, and stop adding ammonia water when the pH value of the mixed solution is 7.5. filter out impurities;

[0031] S2: Add 0.4mol / l cobalt nitrate solution and ammonia water dropwise to the mixed solution at the same time, and stir for 20 minutes;

[0032] S3: adding ammonia water dropwise to maintain the pH value of the mixed solution between 9, and stirring and standing still, a hydrogel is formed in the mixed solution, and the stirring and standing time are each 3 hours;

[0033] S4: Use absolute ethanol to replace the water in the hydrogel until the water content in the filtrate is detected by gas chromatography to be lower than 5%, an...

Embodiment 3

[0038] A method for preparing a nickel-cobalt carbon nanotube airgel zinc-air battery catalyst, the specific steps of the preparation method of the nickel-cobalt / carbon nanotube airgel zinc-air battery catalyst are as follows:

[0039] S1: Add ammonia water dropwise to the 0.3mol / l metal nickel solution under strong stirring at room temperature, stop adding ammonia water when the pH value of the mixed solution is 7.5, and use the displacement precipitation method to dissolve the metal nickel solution into the solution before the reaction. filter out impurities;

[0040] S2: Add 0.3 mol / l cobalt nitrate solution and ammonia water dropwise to the mixed solution at the same time, and stir for 18 minutes;

[0041] S3: adding ammonia water dropwise to maintain the pH value of the mixed solution at 8.7, and stirring and standing still, a hydrogel is formed in the mixed solution, and the stirring and standing time are each 3 hours;

[0042] S4: Use absolute ethanol to replace the wa...

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Abstract

The invention discloses a preparation method of a nickel-cobalt CNT (carbon nano tube) aerogel zinc-air battery catalyst in the technical field of battery catalysts. The preparation method of the nickel-cobalt CNT aerogel zinc-air battery catalyst is characterized by comprising specific steps as follows: S1, ammonium hydroxide is dropwise added to regulate pH value; S2, a cobalt nitrate solution and ammonium hydroxide are dropwise added simultaneously and stirred uniformly; S3, ammonium hydroxide is dropwise added again to regulate the pH value, and hydrogel is produced; S4, anhydrous ethanol is adopted to displace water in hydrogel, and jelly-like alcogel is obtained; S5, the alcogel is transferred into an autoclave and is heated and pressurized; S6, ethanol is evaporated, nitrogen purging is performed, and a catalyst precursor is obtained; S7, the catalyst precursor is smashed and sieved. The preparation method of the catalyst is simple, large-scale industrial production can be performed, the prepared catalyst is high in activity and good in stability, particles of the catalyst are superfine, premise and guarantee are provided for preparation of uniform-quality CNTs, and the preparation method has quite high economic benefit.

Description

technical field [0001] The invention relates to the technical field of battery catalysts, in particular to a method for preparing a nickel-cobalt carbon nanotube airgel zinc-air battery catalyst. Background technique [0002] Lithium cobalt oxide is currently the most widely used battery material, but cobalt resources are increasingly scarce and expensive, and there are safety hazards in the use of lithium cobalt oxide batteries. Nickel-cobalt lithium manganese oxide replaces more than two-thirds of the cobalt in lithium cobalt oxide with relatively cheap nickel and manganese. The cost advantage is very obvious. Compared with other lithium-ion battery cathode materials lithium manganese oxide and lithium iron phosphate, Nickel cobalt lithium manganese oxide material and lithium cobalt oxide are very close in terms of electrochemical performance and processing performance, making nickel cobalt lithium manganese oxide material a new battery material and gradually replacing lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M12/06B01J23/755
CPCB01J23/755H01M4/9041H01M12/06
Inventor 晁淑军王歌于洁徐德忠王紫荆
Owner XINXIANG MEDICAL UNIV
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