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Catalyst for secondary reversible air electrode and preparation method thereof

An air electrode and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, battery electrodes, etc., can solve problems such as structural damage, and achieve the effects of simple preparation methods, improved catalytic effects, and improved cycle performance

Active Publication Date: 2012-09-12
紫石能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a catalyst for a secondary reversible air electrode, which can effectively solve the problem that when carbon materials are used as a carrier, its structure is easily damaged, and at the same time can improve the cycle performance of the battery; the preparation method is simple, and the direct heating method is not necessary. Adding other substances, the prepared catalyst has high purity and is uniformly dispersed on the carrier, which can better improve the catalytic effect and is suitable for industrial production

Method used

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  • Catalyst for secondary reversible air electrode and preparation method thereof
  • Catalyst for secondary reversible air electrode and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] A kind of catalyst for secondary reversible air electrode, its chemical formula is La 0.6 Ca 0.4 CoO 3 / TiC, where La 0.6 Ca 0.4 CoO 3 The loading amount is 50wt%.

[0017] The preparation method of the catalyst for the above-mentioned secondary reversible air electrode is:

[0018] The TiC powder was sieved and placed in 10wt% nitric acid solution, stirred at 60°C for 6 hours, the filtrate was removed and washed repeatedly with deionized water until pH = 7, and the pretreated TiC powder was dried for use.

[0019] Prepare a mixed solution of lanthanum nitrate, calcium nitrate and cobalt nitrate at a molar ratio of lanthanum, calcium and cobalt of 3:2:5. According to the calculated main catalyst La after the reaction in the mixed solution 0.6 Ca 0.4 CoO 3 The mass ratio of TiC carrier to TiC carrier is 1:1, and the above-mentioned spare TiC powder is added to the mixed solution.

[0020] Then, fully stir and mix at 80°C until the water vapor evaporates and the...

Embodiment 2

[0023] A kind of catalyst for secondary reversible air electrode, its chemical formula is La 0.5 Ca 0.5 CoO 3 / TiC, where La 0.5 Ca 0.5 CoO 3 The loading amount is 5wt%.

[0024] The preparation method of the catalyst for the above-mentioned secondary reversible air electrode is:

[0025] The TiC powder was sieved and placed in 5wt% nitric acid solution, stirred at 50°C for 8 hours, the filtrate was removed and washed repeatedly with deionized water until pH=7, and the pretreated TiC powder was dried for use.

[0026] A mixed solution of lanthanum nitrate, calcium nitrate and cobalt nitrate is prepared at a molar ratio of lanthanum, calcium and cobalt of 1:1:2. According to the calculated main catalyst La after the reaction in the mixed solution 0.5 Ca 0.5 CoO 3 The mass ratio of TiC carrier to TiC carrier is 1:19. Add the spare TiC powder mentioned above into the mixed solution.

[0027] Then, fully stir and mix at 60°C until the water vapor evaporates and the stirr...

Embodiment 3

[0029] A kind of catalyst for secondary reversible air electrode, its chemical formula is La 0.7 Ca 0.3 CoO 3 / TiC, where La 0.7 Ca 0.3 CoO 3 The loading amount is 80wt%.

[0030] The preparation method of the catalyst for the above-mentioned secondary reversible air electrode is:

[0031] The TiC powder was sieved and placed in 30wt% hydrochloric acid solution, stirred at 80°C for 3 hours, the filtrate was removed and washed repeatedly with deionized water until pH = 7, and the pretreated TiC powder was dried for use.

[0032] Prepare a mixed solution of lanthanum chloride, calcium chloride and cobalt chloride at a molar ratio of lanthanum, calcium and cobalt of 7:3:10. According to the calculated main catalyst La after the reaction in the mixed solution 0.7 Ca 0.3 CoO 3 The mass ratio of TiC carrier to TiC carrier is 4:1, and the above-mentioned spare TiC powder is added to the mixed solution.

[0033] Then, fully stir and mix at 90°C until the water vapor evaporat...

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Abstract

The invention relates to a catalyst for a secondary reversible air electrode and a preparation method thereof, in particular to a load type perovskite type catalyst for the secondary reversible air electrode. The chemical formula of the catalyst is LaxCa (1-x) CoO3 / TiC or LaxCa (1-x) CoO3 / TiN, wherein 0.5<=x<=0.7, and the loading quantity of LaxCa (1-x) CoO3 is 5wt%-80wt%. The catalyst is capable of resolving the problem that structure of a carbon material is easy to damage when the carbon material serves as a carrier, simultaneously improves circulation performance of a battery, is simple in preparation method, adopts a direct heating method without adding other materials, is high in purity, is evenly dispersed on the carrier, and is capable of well improving catalyst effect and suitable for industrial production.

Description

technical field [0001] The invention relates to a catalyst for a secondary reversible air electrode, in particular to a supported perovskite catalyst for a secondary reversible air electrode; the invention also relates to a preparation method of the catalyst. Background technique [0002] With the reduction of fossil fuels, seeking new renewable energy has become an important measure to solve the energy crisis in the world today. Various fuel cells have emerged as potential alternative energy sources. Among them, metal-air batteries are a special type of fuel cells. Available metals include zinc, aluminum, magnesium, etc. These metal elements are abundant on the earth and can be used after use. It can be recycled and reused, and no toxic by-products are generated during use. Therefore, metal-air batteries have the advantages of low cost, non-toxicity, no pollution, and high specific energy. [0003] As the cathode, the air electrode is an important part of the metal-air ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J27/24H01M4/90
CPCY02E60/50
Inventor 熊宇迪
Owner 紫石能源有限公司
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