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Composite catalyst for metal-air battery cathode and preparation method thereof

A metal-air battery and composite catalyst technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of high preparation cost, cumbersome process, and inability to meet large-scale production, and achieve enhanced catalytic activity, high stability, and preparation The effect of simple process

Active Publication Date: 2021-10-12
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nitrogen-doped carbon material-supported oxide is one of the many fields of metal-air battery cathode catalyst research. It has received great attention in recent years. The introduction of metal oxides into nitrogen-doped carbon materials can improve the catalytic performance of carbon materials. At present, There are also many reports on the introduction of metal oxides into nitrogen-doped carbon materials, but the currently disclosed methods for preparing composite catalysts are cumbersome and costly, and cannot meet large-scale production, that is, they cannot meet the needs of commercial metal-air batteries.

Method used

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  • Composite catalyst for metal-air battery cathode and preparation method thereof
  • Composite catalyst for metal-air battery cathode and preparation method thereof
  • Composite catalyst for metal-air battery cathode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 0.2g Vulcan-72XC and 0.05g carbon nanotubes (mass ratio 4:1), add the two to absolute ethanol, stir, ultrasonicate, dry, and the mixture is named V-CNT. Weigh 0.25g V-CNT and 1g urea (mass ratio 1:4), add the two to absolute ethanol and stir, ultrasonicate, dry, and the mixture is named V-CNT-N. Then the dried V-CNT-N was put into a tube furnace and heated to 600 °C for 3 h at a heating rate of 5 °C / min under nitrogen. Finally, the reaction product was ground and dried to obtain the final product, that is, a nitrogen-doped Vulcan-72XC / carbon nanotube material, named V-CNT-N-600°C.

[0035] Weigh 0.5g V-CNT-N-600℃ and 0.5g manganese acetate tetrahydrate (mass ratio 1:1), add absolute ethanol to stir, ultrasonicate, and dry. Then the dried mixture was put into a tube furnace and heated to 280 °C for 3 h at a heating rate of 5 °C / min under nitrogen. Finally, the reaction product is ground and dried to obtain the final product, that is, a nitrogen-doped Vulcan-72XC / ...

Embodiment 2

[0038] Weigh 0.45g Vulcan-72XC and 0.05g carbon nanotubes (mass ratio 9:1), add the two to absolute ethanol and stir, ultrasonicate, dry, and the mixture is named V-CNT. Weigh 0.25g V-CNT and 1g urea (mass ratio 1:4), add the two to absolute ethanol and stir, ultrasonicate, dry, and the mixture is named V-CNT-N. Then the dried V-CNT-N was put into a tube furnace and heated to 550 °C for 5 h at a heating rate of 5 °C / min under nitrogen. Finally, the reaction product was ground and dried to obtain the final product, that is, a nitrogen-doped Vulcan-72XC / carbon nanotube material, named V-CNT-N-550°C.

[0039]Weigh 0.5g V-CNT-N-550℃ and 0.25g manganese acetate tetrahydrate (mass ratio 2:1), add the two to absolute ethanol, stir, ultrasonicate, and dry. Then the dried mixture was put into a tube furnace and heated to 300 °C for 5 h at a heating rate of 5 °C / min under nitrogen. Finally, the reaction product is ground and dried to obtain the final product, that is, a nitrogen-doped...

Embodiment 3

[0042] Weigh 0.45g Vulcan-72XC and 0.05g carbon nanotubes (mass ratio 9:1), add the two to absolute ethanol and stir, ultrasonicate, dry, and the mixture is named V-CNT. Weigh 0.25g V-CNT and 0.75g melamine (mass ratio 1:3), add the two to absolute ethanol and stir, ultrasonicate, dry, and the mixture is named V-CNT-N. Then the dried V-CNT-N was put into a tube furnace and heated to 580 °C for 4 h at a heating rate of 5 °C / min under nitrogen. Finally, the reaction product was ground and dried to obtain the final product, that is, a nitrogen-doped Vulcan-72XC / carbon nanotube material named V-CNT-N-580°C.

[0043] Weigh 0.5g V-CNT-N-550℃ and 0.5g manganese acetate tetrahydrate (mass ratio 1:1), add absolute ethanol to stir, ultrasonicate, and dry. Then the dried mixture was put into a tube furnace and heated to 250 °C for 4 h at a heating rate of 5 °C / min under nitrogen. Finally, the reaction product is ground and dried to obtain the final product, that is, a nitrogen-doped Vu...

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Abstract

The invention provides a composite catalyst for a metal-air battery cathode and a preparation method thereof. The nitrogen-doped C / carbon nanotube / MnO composite catalyst is prepared by a two-step heat treatment method using conductive carbon black and carbon nanotubes as raw materials. Doping increases the surface defects of carbon materials and increases the active sites supported by MnO, and both of them improve the catalytic activity of the catalyst. The method provided by the invention can achieve nitrogen atom doping and MnO loading on the carbon material through two-step heat treatment, the experimental raw materials are easy to obtain, the preparation process is simple, and the experimental results show that the oxygen reduction catalytic activity of the prepared composite material is greatly enhanced, The catalyst itself has high stability, which is of great significance for the development of cathode catalysts for commercial metal-air batteries.

Description

technical field [0001] The invention relates to the field of metal-air battery cathode catalysts, in particular to a composite catalyst for metal-air battery cathodes and a preparation method thereof. Background technique [0002] The rapid development of electronic equipment puts forward higher performance requirements for batteries. The fuel cell can directly convert the chemical energy in the fuel into electrical energy under the action of an oxidant, and has high energy utilization efficiency. The fuel required in the electrochemical reaction can be continuously supplied or quickly replenished, breaking away from the fixed capacity limitation of traditional batteries. Compared with other battery fuels, metal materials can release a lot of energy during oxidation. On the basis of inheriting the above advantages, the metal-air fuel cell combines the high energy density of the material with the infinite storage of oxygen in the air, which can effectively increase the theo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90
CPCH01M4/8652H01M4/9016H01M4/9083Y02E60/50
Inventor 胡俊华武智昊曹国钦徐恩霞师昊森班锦锦
Owner ZHENGZHOU UNIV
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