Integrated three-dimensional ordered porous thin film electrode material and its preparation method and application

A porous film, three-dimensional ordered technology, applied in the field of electrochemistry, can solve the problems of sodium-ion batteries that cannot be directly applied, the disintegration of the electrode structure of sodium-ion batteries, and the decline of battery cycle life, and achieves unique pore distribution and high integrity. , the effect of high pore structure

Active Publication Date: 2021-02-02
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small interlayer distance and the volume of sodium ions is 2.41 times the volume of lithium ions in the traditional negative electrode material graphite of lithium ion batteries, during the charging and discharging process, sodium ions will be inserted into or extracted from the graphite electrode, which will induce a drastic change in the electrode volume, resulting in The disintegration of the electrode structure of sodium-ion batteries, which eventually leads to the decrease of battery cycle life
Therefore, traditional graphite anode materials cannot be directly applied to sodium-ion batteries

Method used

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  • Integrated three-dimensional ordered porous thin film electrode material and its preparation method and application
  • Integrated three-dimensional ordered porous thin film electrode material and its preparation method and application
  • Integrated three-dimensional ordered porous thin film electrode material and its preparation method and application

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Embodiment 1

[0032]The integrated three-dimensional ordered porous film electrode material and its preparation method and application mainly include the following steps:

[0033](1) Preparation of metal organic framework solution:

[0034]Mix the metal salt copper acetate (0.0618g, 1mmol / L) with solvent ethanol (300ml), and ultrasonically disperse for 30 minutes to obtain the metal salt copper acetate solution;

[0035]Mix the organic ligand terephthalic acid (0.0099g, 0.2mmol / L) with solvent ethanol (300ml), and ultrasonically disperse for 30 minutes to obtain the organic ligand terephthalic acid solution;

[0036](2) Pretreatment of inorganic support:

[0037]Expose the surface of the inorganic support copper foil to ultraviolet light for 5 minutes, and then soak the surface in a 1mmol / L 16-mercaptohexadecyl acid ethanol solution for 24 hours for surface modification treatment;

[0038](3) Using liquid phase epitaxy self-assembly method to prepare metal organic frame film on inorganic support:

[0039]The surface ...

Embodiment 2

[0052]The integrated three-dimensional ordered porous film electrode material and its preparation method mainly include the following steps:

[0053](1) Preparation of MOF metal organic framework solution:

[0054]Mix zinc nitrate hexahydrate (1.6899g, 10mmol / L) with solvent ethanol (400ml), stir and disperse for 1 hour to obtain a metal salt hexahydrate zinc nitrate solution;

[0055]Mix organic ligand dimethylimidazole (0.6268g, 20mmol / L) with solvent ethanol (400ml), stir and disperse for 1 hour to obtain organic ligand dimethylimidazole solution;

[0056](2) Pretreatment of inorganic support:

[0057]Expose the surface of the copper foil of the inorganic support to ultraviolet light for 5 minutes, and then soak the surface of the inorganic support in a 1mmol / L 11-mercapto-1-undecol ethanol solution for 24 hours for surface modification treatment;

[0058](3) The metal organic frame film is prepared on the inorganic support by the self-assembly method of pulling and coating:

[0059]The surface of th...

Embodiment 3

[0063]The integrated three-dimensional ordered porous film electrode material and its preparation method mainly include the following steps:

[0064](1) Preparation of metal organic framework solution:

[0065]The metal salt copper acetate (0.0419 g, 1 mmol / L) was mixed with solvent ethanol (200 ml), and ultrasonically dispersed for 30 min to obtain a metal salt copper acetate solution.

[0066]The organic ligand trimellitic acid (0.0088g, 0.2mmol / L) and solvent ethanol (200ml) were mixed, and ultrasonically dispersed for min to obtain the organic ligand trimellitic acid solution.

[0067]The metal salt solution and the organic ligand solution are mixed.

[0068](2) Pretreatment of inorganic support:

[0069]Expose the surface of the copper foil of the inorganic support to ultraviolet light for 20 minutes, and then soak the surface of the inorganic support in a 1mmol / L 16-mercaptohexadecyl acid ethanol solution for 12 hours for surface modification;

[0070](3) The metal organic frame film is prepared o...

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Abstract

The invention discloses a method for preparing an integrated three-dimensional ordered porous thin film electrode material. Specifically, a liquid phase epitaxial self-assembly method is used to grow a metal organic framework material on an inorganic support to form a dense, crystal-oriented Metal-organic framework porous film, and then the metal-organic framework film / inorganic support composite structure in N 2 The three-dimensional ordered porous thin film electrodes were obtained by high-temperature calcination in the atmosphere. The porous film electrode prepared in the present invention not only has a large specific surface area, but also has a three-dimensional ordered porous network structure, which can increase the active interface between the material and the electrolyte, and enhance the kinetics of the electrode material in the electrochemical reaction process. The conductive performance of ions and electrons can be effectively improved, and can be used in electrochemical devices (such as sodium ion batteries, fuel cells, electrochemical sensors, etc.), and the preparation method is simple and easy to expand production.

Description

Technical field[0001]The invention relates to an integrated three-dimensional ordered porous film electrode material and a preparation method and application thereof, and belongs to the field of electrochemistry.Background technique[0002]Lithium-ion batteries have been widely used in portable electronic devices and electric vehicles due to their high energy density, long cycle life and environmental friendliness. However, the cost problem caused by the scarcity of lithium resources limits the further development of lithium-ion batteries. Compared with lithium ion batteries, sodium ion batteries have great research significance and application prospects due to the use of resource-rich and widely distributed sodium metal elements.[0003]In the development of sodium-ion batteries, the use of high-performance anode materials is the key to improving battery performance. The traditional lithium ion battery anode material graphite, due to the small interlayer spacing and the volume of sodiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/58H01M4/583H01M4/60H01M4/62H01M10/054
CPCH01M4/0402H01M4/5825H01M4/583H01M4/60H01M4/625H01M10/054H01M2004/027Y02E60/10
Inventor 王正帮聂春慧郑自建苏琪
Owner HUBEI UNIV
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