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A cathode catalyst for air battery and its preparation method

A cathode catalyst and production method technology, which are applied to battery electrodes, fuel cell-type half-cells, primary cell-type half-cells, circuits, etc. problem, to achieve the effect of improving catalytic activity and simple preparation process

Inactive Publication Date: 2016-08-17
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cathode catalyst for an air battery and a preparation method thereof, which can solve the problem of poor manganese dioxide crystal form synthesis dispersibility, uncontrollable crystal form, and unpredictable shape and size in manganese oxide, silver, and activated carbon composite catalysts. The problem of control, so that the catalytic performance of the catalyst is greatly improved

Method used

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  • A cathode catalyst for air battery and its preparation method
  • A cathode catalyst for air battery and its preparation method
  • A cathode catalyst for air battery and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Dissolve 10g of potassium permanganate in 120ml of water to make a purple aqueous solution;

[0024] Step 2: 18 g of manganese chloride is dissolved in 25 ml of water to make an aqueous solution; Step (3): under vigorous stirring, the solution obtained in step (2) is dripped into the solution obtained in step (1) at a speed of 5 drops / minute, After the dropwise addition, continue to stir until uniform;

[0025] Step 4: Transfer the sol obtained in Step 3 to a polytetrafluoroethylene-lined stainless steel reactor, package it and put it in an oven at 180°C, and let it stand for heating for 4 hours;

[0026] Step 5: The obtained product was washed with water for 2 to 3 times at room temperature, and then dried at room temperature to obtain gray-black powder;

[0027] Step 6: the hydrazine hydrate solution diluted 4 times with distilled water is dripped in the hydrosol of silver nitrate and activated carbon stirred at a speed of 1 drop / min, and the mass ratio betwe...

Embodiment 2

[0030] Step 1: Dissolve 10g of potassium permanganate in 120ml of water to make a purple aqueous solution;

[0031] Step 2: Dissolve 10g of manganese sulfate in 25ml of water to make an aqueous solution;

[0032] Step 3: Under the condition of vigorous stirring, drop the solution obtained in step (2) into the solution obtained in step 1 at a rate of 4 drops / minute, and continue stirring until uniform after the dropwise addition;

[0033] Step 4: Transfer the sol obtained in Step 3 to a polytetrafluoroethylene-lined stainless steel reaction kettle, package it, put it in an oven at 120°C, and let it stand for heating for 6 hours;

[0034] Step 5: The obtained product was washed with water for 2 to 3 times at room temperature, and then dried at room temperature to obtain a light green powder;

[0035] Step 6: the hydrazine hydrate solution diluted 4 times with distilled water is dripped in the hydrosol of silver nitrate and activated carbon that are stirred at a speed of 1 drop / ...

Embodiment 3

[0038] Step 1: Dissolve 10g of potassium permanganate in 120ml of water to make a purple aqueous solution;

[0039] Step 2: Dissolve 20g of manganese sulfate in 25ml of water to make an aqueous solution;

[0040] Step 3: Under the condition of vigorous stirring, drop the solution obtained in Step 2 into the solution obtained in Step 1 at a rate of 4 drops / minute, and continue stirring until uniform after the addition;

[0041] Step 4: Transfer the sol obtained in Step 3 to a polytetrafluoroethylene-lined stainless steel reaction kettle, package it, put it in an oven at 120°C, and let it stand for heating for 6 hours;

[0042] Step 5: The obtained product is washed with water at room temperature for 2 to 3 times, and then dried at room temperature to obtain a light green powder;

[0043] Step 6: The hydrazine hydrate solution diluted 4 times with distilled water is dropped into the stirred silver nitrate and the hydrosol of activated carbon at a speed of 1 drop / minute, and the...

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Abstract

The invention relates to a cathode catalyst for an air battery and a preparation method of the cathode catalyst. The preparation method is characterized by specifically comprising the following steps: dissolving potassium permanganate in water to prepare a purple solution, and dissolving positive bivalent manganese salt into water to prepare another solution; under severe stirring, dripping the solution into which positive bivalent manganese salt is dissolved into the purple solution into which potassium permanganate is dissolved at a speed of 1-10 droplets per minute, transferring the sol into a stainless steel reaction kettle with a polytetrafluoroethylene lining, washing the obtained product for 2-3 times with water at the room temperature, and drying at the room temperature so as to obtain black powder; and dripping a hydrazine hydrate solution which is diluted by distilled water for 2-10 times into hydrosol of stirred silver nitrate and activated carbon at a speed of 1-10 droplets per minute. By adopting the cathode catalyst, the problems that manganese dioxide in a manganese oxide, silver and activated carbon composite catalyst is poor in synthesis dispersion property, uncontrollable in crystal form and uncontrollable in morphology are solved, and the catalysis property of the catalyst is greatly improved.

Description

technical field [0001] The invention relates to a cathode catalyst for an air battery and a preparation method thereof, and the patent belongs to the technical field of fuel cells, in particular to a composition of a cathode catalyst for a metal-air battery and a preparation method thereof. Background technique [0002] A metal-air battery is a type of fuel cell in which a metal such as Mg, Al, Zn, Fe, etc. with a negative electrode potential is used as the negative electrode, and oxygen molecules in air or water are used as the positive electrode. This type of battery has broad application prospects because of its advantages such as high specific energy, stable working voltage, good safety, environmental protection and low manufacturing cost. The cathode is the core part of the metal-air battery, and its redox catalyst is a key factor affecting the performance of the cathode. Therefore, to develop a metal-air battery, the development of a cathode catalyst with excellent per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90
CPCH01M4/9016H01M12/06
Inventor 张斌王金兴张克金许德超王丹魏传盟
Owner CHINA FIRST AUTOMOBILE