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Preparation method of silver single atom/manganese dioxide composite catalyst for aluminum-air battery

A technology of aluminum-air batteries and composite catalysts, which is applied to fuel cell-type half-cells and primary battery-type half-cells, battery electrodes, circuits, etc., can solve the problems of high preparation cost and low silver conversion rate, and reduce the production cost. Cost, reduction of silver usage, and effect of reduction of usage cost

Active Publication Date: 2022-06-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problems of low silver conversion rate and high preparation cost in the existing catalyst preparation method for aluminum-air batteries, the present invention further provides a method for preparing a silver single atom / manganese dioxide composite catalyst for aluminum-air batteries

Method used

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  • Preparation method of silver single atom/manganese dioxide composite catalyst for aluminum-air battery
  • Preparation method of silver single atom/manganese dioxide composite catalyst for aluminum-air battery
  • Preparation method of silver single atom/manganese dioxide composite catalyst for aluminum-air battery

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Experimental program
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Effect test

specific Embodiment 1

[0053] Step (1), take by weighing 1.5g manganese acetate tetrahydrate and place in a beaker, add 100mL distilled water and stir for 30 minutes and then adjust pH to 11 with sodium hydroxide;

[0054] Step (2), weigh 0.644g potassium permanganate, dissolve in 50mL distilled water, and stir evenly;

[0055] In step (3), the potassium permanganate solution prepared in step (2) was added dropwise to the solution prepared in step (1), and stirred; when the potassium permanganate solution was added dropwise, the solution was stirred for 1 hour, and Suction filtration, washed with distilled water, and then dried in an oven at 60° C. for 12 hours to obtain an amorphous manganese dioxide catalyst.

[0056] In step (4), the obtained manganese dioxide is treated with argon plasma for 8 hours to obtain manganese dioxide rich in oxygen vacancies.

[0057] Step (5), configure 25mL concentration of silver nitrate solution of 0.02M, and disperse the manganese dioxide rich in oxygen vacancies...

specific Embodiment 2

[0060] Step (1), weigh 1.288g potassium permanganate and place in a beaker, add 50mL distilled water and stir for 30 minutes;

[0061] Step (2), take by weighing 3g of manganese acetate tetrahydrate, dissolve in 100mL of distilled water, stir evenly, and adjust pH to 10 with sodium hydroxide;

[0062] In step (3), the solution prepared in step (2) was added dropwise to the dispersion system prepared in step (1), and stirred; after the dropwise addition of the manganese acetate solution was completed, the solution was stirred for 1 hour, and filtered with suction and used for stirring. It was washed with distilled water, and then dried in an oven at 60° C. for 12 hours to obtain an amorphous manganese dioxide catalyst.

[0063] In step (4), the obtained manganese dioxide is treated with argon plasma for 8 hours to obtain manganese dioxide rich in oxygen vacancies.

[0064] Step (5), configure 25mL concentration of silver nitrate solution of 0.02M, and disperse the manganese di...

specific Embodiment 3

[0067] Step (1), take 3g of manganese acetate tetrahydrate and place it in a beaker, add 100mL of distilled water and stir for 30 minutes to adjust pH to 11;

[0068] Step (2), weigh 1.288g potassium permanganate, dissolve in 50mL distilled water, and stir evenly;

[0069] In step (3), the potassium permanganate solution prepared in step (2) was added dropwise to the dispersion system prepared in step (1), and stirred; when the potassium permanganate solution was added dropwise, stirred for 1 hour, and suction filtered, washed with distilled water, and then dried in an oven at 60° C. for 12 hours to obtain an amorphous manganese dioxide catalyst.

[0070] In step (4), the obtained manganese dioxide is treated with argon plasma for 8 hours to obtain manganese dioxide rich in oxygen vacancies.

[0071] In step (5), 25 mL of silver nitrate solution with a concentration of 0.02 M is prepared, and the oxygen-rich vacancy-rich manganese dioxide is dispersed therein.

[0072] In st...

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Abstract

The invention relates to a preparation method of a silver single atom / manganese dioxide composite catalyst for an aluminum-air battery, and the invention relates to a technology in the field of a metal-air battery. In order to solve the problems of low conversion rate of silver and high preparation cost existing in the existing catalyst preparation method for aluminum-air batteries. Step 1: Prepare manganese dioxide; Step 2: Prepare manganese dioxide with oxygen-rich vacancies; Step 3: Prepare manganese dioxide impregnated with silver nitrate; Step 4: At 500‑1000 ° C, the The manganese oxide is calcined at high temperature under an inert atmosphere to obtain a silver single atom / manganese dioxide composite catalyst. In the present invention, the generation of silver single atoms can reduce the cost of using silver in the preparation of catalysts, utilize manganese dioxide rich in oxygen vacancies, and effectively improve the catalytic efficiency of silver atoms, and reduce the use of silver in the production process of aluminum-air batteries as a whole The silver conversion rate is increased by 15-20%, the preparation cost is reduced, and the production cost is effectively reduced by 10-15% in commercial mass production.

Description

technical field [0001] The invention relates to a technology in the field of metal-air batteries, in particular to a preparation method of a silver single atom / manganese dioxide composite catalyst for an aluminum-air battery. Background technique [0002] With the shortage of non-renewable energy such as oil and the severe environmental problems in our country, people begin to develop new and green renewable energy. From the first-generation lead-acid battery to the keng battery to the metal-air battery that has attracted much attention today, the development of battery power systems has attracted more and more attention. As a new generation of green batteries, metal-air batteries have many advantages such as low manufacturing cost, high specific energy, environmental protection and non-toxicity. [0003] The metal-air batteries that have been studied more at present include zinc-air batteries, aluminum-air batteries, lithium-air batteries, etc. Among them, zinc-air batteri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90H01M12/06
CPCH01M4/9016H01M4/9041H01M4/90H01M4/8652H01M12/06
Inventor 尹鸽平袁亚龙钱正义高云智左朋建
Owner HARBIN INST OF TECH
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