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Carbon-metal organic framework composite material, preparation method thereof and lithium air battery

A technology of metal-organic framework and lithium-air battery, which is applied in the direction of organic compound/hydride/coordination complex catalyst, battery electrode, fuel cell half-cell and primary battery half-cell, etc., which can solve the problem of hindering oxygen flow , actual performance degradation and other issues

Pending Publication Date: 2022-05-27
HYUNDAI MOTOR CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, existing lithium-air batteries use porous materials with dense structures such as carbon fiber and carbon paper as positive electrodes, so as lithium peroxide (Li peroxide) 2 o 2 ) and other discharge products are formed in the porous structure, which hinders the flow of oxygen, etc., so that the actual performance is significantly lower than the theoretical performance.

Method used

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  • Carbon-metal organic framework composite material, preparation method thereof and lithium air battery
  • Carbon-metal organic framework composite material, preparation method thereof and lithium air battery
  • Carbon-metal organic framework composite material, preparation method thereof and lithium air battery

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Example 1: By changing the ratio of single metal ion precursor and organic ligand precursor contained in the mixed solution Prepared carbon-metal organic framework composites

[0055] (S10) A mixed solution (1C) containing a metal ion precursor and an organic ligand precursor is prepared. Specifically, 5.52 mmol of nickel nitrate hexahydrate as a metal ion precursor, 1.68 mmol of 2,5-dihydroxyterephthalic acid (DOT) as an organic ligand precursor, and a solvent ratio of 1: Prepare a mixed solution of 1:1 dimethylformamide, deionized water, and ethanol.

[0056] (S20) Using the mixed solution to form MOF on the surface of the carbon support. Specifically, the carbon support can be prepared through the following steps. That is, a polymer solution containing 10% by weight of polyacrylonitrile in a mixed solvent (DMF) can be prepared for 6 hours. Then, electrospun fibers (carbon nanofibers) can be prepared by electrospinning the polymer solution at a voltage of 15 kV...

Embodiment 2

[0059] Example 2: By changing the ratio of composite metal ion precursor and organic ligand precursor contained in the mixed solution Prepared carbon-metal organic framework composites

[0060] When compared with Example 1, except that a mixed solution was prepared containing 5.52 mmol of nickel nitrate hexahydrate and 2.58 mmol of cobalt nitrate hexahydrate as metal ion precursors, a specific surface area of ​​572.64 can be prepared by the same method as in Example 1. m 2 / g and a carbon-metal organic framework composite with a pore volume of 0.25 cc / g.

Embodiment 3

[0073] Example 3: Manufactured using positive electrodes comprising carbon-metal organic framework composites containing a single metal ion Lithium-air battery

[0074] The positive electrode may be fabricated by a wet coating method using the carbon-metal organic framework composite prepared according to Example 1. In addition, the negative electrode was prepared by including lithium metal, and the electrolyte was prepared by including DMAc LiTFSI. The final production of lithium-air batteries.

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PUM

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Abstract

The present disclosure relates to a carbon-metal organic framework composite material, a method of preparing the same, and a lithium air battery including the composite material as a positive electrode to have excellent conductivity and battery capacity. The preparation method of the carbon-metal organic framework composite material comprises the following steps: preparing a mixed solution containing a metal ion precursor and an organic ligand precursor; forming a metal organic framework (MOF) on the surface of the carbon carrier by using the mixed solution; and carbonizing the MOF formed on the surface of the carbon support to form a carbonized metal organic framework (C-MOF).

Description

technical field [0001] The present disclosure relates to a carbon-metal organic framework composite material, a preparation method thereof, and a lithium air battery including the composite material as a positive electrode so as to have excellent electrical conductivity and battery capacity. Background technique [0002] In recent years, attention has increased in fields requiring high-capacity secondary batteries, such as energy storage systems stored in electric vehicles. However, the lithium-ion batteries developed so far have been evaluated as insufficient to replace fossil fuels and for high-capacity applications due to their low energy density. Therefore, in recent years, many developed countries are actively developing metal-air batteries, especially lithium-air batteries. Lithium-air batteries use oxygen, which can be infinitely supplied from the air, as the active material, so theoretically a very high energy density can be achieved. The theoretical energy density...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J31/16B01J35/06H01M4/90H01M12/06
CPCB01J31/1691B01J21/18H01M4/9083H01M12/06B01J35/33B01J35/58Y02E60/10H01M12/08H01M4/382H01M4/8615H01M4/9041H01M4/96H01M4/8673H01M4/049H01M2004/028H01M2004/027
Inventor 孙参翼申叙允李畅泽申武焕
Owner HYUNDAI MOTOR CO LTD