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Lithium-oxygen battery electrode based on metal organic framework material and preparation method of lithium-oxygen battery electrode

A metal-organic framework and oxygen battery technology, which is applied in battery electrodes, fuel cells, fuel cell half-cells and secondary battery-type half-cells, etc., can solve the problems of uneven pore size distribution, chemical reaction termination, and heavy battery performance. In order to avoid problems such as poor reproducibility, the preparation method is simple and the specific capacitance is improved.

Active Publication Date: 2014-07-30
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The interaction between the electrode material and the oxygen participating in the reaction is weak, and oxygen cannot be enriched in the pores, resulting in insufficient supply of oxygen participating in the reaction;
[0005] 2. The electrolyte and the products generated by the reaction will block the pores of the electrode material, affect the diffusion of oxygen molecules in the material, and lead to the termination of the chemical reaction;
[0006] 3. In porous electrode materials, the pores are disordered and the pore size distribution is uneven, resulting in poor reproducibility of battery performance

Method used

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  • Lithium-oxygen battery electrode based on metal organic framework material and preparation method of lithium-oxygen battery electrode
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  • Lithium-oxygen battery electrode based on metal organic framework material and preparation method of lithium-oxygen battery electrode

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Embodiment 1

[0033] The present invention is further illustrated by the preparation of the electrode material based on the metal organic framework material Mn-MOF-74 and the performance test of the assembled lithium-oxygen battery:

[0034] 1. Preparation of metal organic framework material Mn-MOF-74 and post-activation treatment process:

[0035] 1.1 Synthesis of Mn-MOF-74:

[0036] Weigh 1098 mg of MnCl 2 4H 2 O and 333 mg of 2,5-dihydroxyterephthalic acid were then dissolved in 150 mL of a mixed solvent of dimethylformamide:ethanol:water=15:1:1 (volume ratio). The obtained clear solution was evenly distributed into six Teflon-lined reaction kettles with a capacity of 50 mL, and the reaction kettles were placed in an oven at 135 °C for 24 hours and then taken out.

[0037] 1.2 Post-processing:

[0038] The synthesized material was taken out from the mother liquor, rinsed three times with dimethylformamide, and soaked with methanol. During the immersion period, the methanol was repla...

Embodiment 2

[0054] The present invention is further illustrated by the preparation of the electrode material based on the metal organic framework material Mg-MOF-74 and the performance test of the assembled lithium-oxygen battery:

[0055] 1. Preparation of metal organic framework material Mg-MOF-74 and post-activation treatment process:

[0056] 1.1 Synthesis of Mg-MOF-74:

[0057] Weigh 466.8 mg of Mg(NO 3 ) 2 ·6H 2 O and 112.4 mg of 2,5-dihydroxyterephthalic acid, then it was dissolved into 51 mL of dimethylformamide: ethanol: water = 15: 1: 1 (volume ratio) in the mixed solvent, obtained The clear solution was evenly distributed into 5 glass reaction vials with a capacity of 25 mL, placed in an oven at 125 °C for 20 hours and then taken out.

[0058] 1.2 Post-processing:

[0059] The synthesized material was taken out from the mother liquor, rinsed three times with dimethylformamide, and soaked with methanol. During the immersion period, the methanol was replaced 3 times a day f...

Embodiment 3

[0071] The present invention is further illustrated by the preparation of the electrode material based on the metal organic framework material HKUST-1 and the performance test of the assembled lithium-oxygen battery:

[0072] 1. Preparation of metal organic framework material HKUST-1 and post-activation treatment process:

[0073] 1.1 Synthesis of HKUST-1:

[0074] Weigh 4000 mg of Cu(NO 3 ) 2 ·3H 2 O and the 1,3,5-trimesic acid of 2000 mg, then it is dissolved in the dimethylformamide of 100 mL: ethanol: in the mixed solvent of water=1:1:1 (volume ratio), obtains The clarified solution was evenly distributed into 10 glass reaction vials with a capacity of 25 mL, placed in an oven at 85 °C for 24 hours and then taken out.

[0075] 1.2 Post-processing:

[0076]The synthesized material was taken out from the mother liquor, rinsed three times with dimethylformamide, and soaked with acetone. During the immersion period, the acetone was replaced 3 times a day for 3 days; the ...

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Abstract

The invention belongs to the technical field of lithium-oxygen batteries, and particularly relates to a lithium-oxygen battery electrode based on a metal organic framework material and a preparation method of the lithium-oxygen battery electrode. The lithium-oxygen battery electrode provided by the invention is prepared by compounding the metal organic framework material, a porous carbon material, an adhering agent and the like, wherein the metal organic framework material provides an ordered micropore structure for the lithium-oxygen battery electrode, and thus transmission of a reaction gas is facilitated; the carbon material provides unordered pore passages (micropore, mesopore and macropore) when providing the conduction performance, thereby providing a storage space for a reaction product. The preparation method is simple; the prepared electrode is used for testing a battery, results indicate that compared with other batteries, a lithium-oxygen battery has the advantage that the specific capacitance of the lithium-oxygen battery containing the metal organic framework material is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-oxygen batteries, and in particular relates to a lithium-oxygen battery electrode material based on a metal organic framework material and a preparation method. Background technique [0002] The change and deterioration of the environment and the continuous consumption of fossil energy such as coal, oil and other non-renewable resources force us to seek sustainable and renewable new energy sources. At present, the use of renewable energy such as solar energy and wind energy is limited by region and time, and objectively requires high-capacity energy storage devices to achieve efficient energy use. At the same time, with the development of society, some new portable electronic devices have appeared one after another. Electric vehicles or hybrid vehicles have attracted great interest because of their lower carbon dioxide emissions. The application of the above devices urgently requires us to improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M12/08
CPCH01M4/8828H01M8/0243H01M12/08Y02E60/50Y02E60/10
Inventor 李巧伟王永刚吴斗峰
Owner FUDAN UNIV
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