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Metal-air battery cathode catalyst and preparation method thereof

A metal-air battery and catalyst technology, which is applied in metal/metal oxide/metal hydroxide catalysts, battery electrodes, chemical instruments and methods, etc., can solve the problems of high price, difficult to apply in large quantities, etc. The effect of increasing the working voltage and open circuit voltage and improving the polarization characteristics

Active Publication Date: 2016-12-07
江苏振乾机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Although platinum has high activity and stability for the oxygen reduction reaction, and its loading capacity has been greatly improved, it is difficult to be widely used in the commercial field due to its high price and scarce resources. Platinum catalysts are particularly important

Method used

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  • Metal-air battery cathode catalyst and preparation method thereof
  • Metal-air battery cathode catalyst and preparation method thereof
  • Metal-air battery cathode catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] La 0.9 Ca 0.1 MnO 3 preparation.

[0070] Weigh 0.018molLa(NO 3 ) 3 ·6H 2 O, 0.002molCa(NO 3 ) 2 4H 2 O, 0.02molMn(NO 3 ) 2 ·6H 2 O; Weigh 0.06mol malic acid, make a solution with deionized water in a 250ml beaker, and use 25-28% NH 3 Adjust the pH value to 3 with H20; rotary evaporate at about 70°C until a viscous colloid is formed; then put it into a constant temperature drying oven, fully dry it at 150°C, and put it into a crucible after grinding; In the muffle furnace, calcine at a constant temperature of 600 °C for 2 hours, and the heating rate is 8 °C min -1 , Catalyst 1 was obtained by fully grinding the calcined black powder.

[0071] figure 1 Middle b is its XRD pattern, and the catalyst has less heterogeneous phases. The crystal particle size is only a dozen nanometers, which is a typical nanomaterial with excellent physical and chemical properties, uniform particles, and small pores, which makes its surface area larger and has better catalytic ...

Embodiment 2

[0073] La 0.8 Ca 0.2 MnO 3 preparation.

[0074] Weigh 0.016molLa(NO 3 ) 3 ·6H 2 O, 0.004molCa(NO 3 ) 2 4H 2 O, 0.02molMn(NO 3 ) 2 ·6H 2 O; Weigh 0.06mol malic acid, make a solution with deionized water in a 250ml beaker, and use 25-28% NH 3 Adjust the pH value to 9 with H20; rotary evaporate at around 70°C to form a viscous colloid; then put it into a constant temperature drying oven, fully dry it at 150°C, and put it into a crucible after grinding; In the muffle furnace, calcine at a constant temperature of 700°C for 2 hours, and the heating rate is 8°C·min -1 , fully grind the calcined black powder to obtain Catalyst 2.

[0075] figure 1 Middle c is its XRD pattern, and the impurity phase of the catalyst is less. Observing the morphology of catalyst particles under a transmission electron microscope (TEM) magnification of 190,000 times, it is found that the particle size is small, and the crystal particle size is only a dozen nanometers. It is a typical nanom...

Embodiment 3

[0077] La 0.7 Ca 0.3 MnO 3 preparation.

[0078] Weigh 0.014molLa(NO 3 ) 3 ·6H 2 O, 0.006molCa(NO 3 ) 2 4H 2 O, 0.02molMn(NO 3 ) 2 ·6H 2 O; Weigh 0.06mol malic acid, make a solution with deionized water in a 250ml beaker, and use 25-28% NH 3 Adjust the pH value to 5 with H20; rotate and evaporate at about 70°C to form a viscous colloid; then put it into a constant temperature drying oven, fully dry it at 150°C, and put it into a crucible after grinding; In the muffle furnace, calcine at a constant temperature of 850°C for 2 hours, and the heating rate is 8°C·min -1 , Catalyst 3 is obtained by fully grinding the calcined black powder.

[0079] figure 1 Middle d is its XRD pattern, and the impurity phase of the catalyst is less. Observing the morphology of catalyst particles under a transmission electron microscope (TEM) magnification of 190,000 times, it is found that the particle size is small, and the crystal particle size is only a dozen nanometers. It is a ty...

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Abstract

The present invention relates to a metal air battery anode catalyst and a preparation method thereof. The structure formula of the catalyst is as follow: La1-xAxBO3, wherein x=0.1, 0.2, 0.3, 0.4 or 0.5; A is Ca or Sr; B is Co or Mn. The preferable plan is as follow: the catalyst is modified with active carbon. The proper metal air battery anode catalyst is used to improve the polarization characteristics of an air electrode, improve the working voltage and open circuit voltage of the battery; and moreover, the metal air battery anode catalyst is lower in cost and has better application prospects.

Description

technical field [0001] The invention relates to the field of battery catalysts, in particular to a metal-air battery cathode catalyst and a preparation method thereof. Background technique [0002] A metal-air battery consists of a metal anode, an air cathode, and an alkaline electrolyte, KOH. [0003] The metal undergoes a redox reaction with the oxygen in the air in the alkaline electrolyte KOH medium. The metal provides electrons as the negative electrode active material, and the oxygen in the air acts as the positive electrode active material to obtain electrons through the air electrode carrier activated carbon made. In alkaline electrolysis A closed circuit is formed in the liquid KOH to provide power to the outside world. The anode reaction of the metal-air battery is the oxidation of metal, and the cathode is the reduction of oxygen. This is the same as the cathode process of the gas fuel cell. Therefore, some people regard it as a kind of fuel cell. [0004] Compa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90B01J23/34B01J23/83
CPCY02E60/50
Inventor 不公告发明人
Owner 江苏振乾机电科技有限公司