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A core-shell fiber structure electrode and its preparation method and application

A technology of core-shell structure and fiber structure, which is applied in the field of new core-shell structure electrode and its preparation, to achieve the effects of small electrode ohmic polarization loss, strong practicability, and high ion transmission efficiency

Active Publication Date: 2021-08-31
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the preparation of metal-composite porous nanofibers is challenging and promising.

Method used

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  • A core-shell fiber structure electrode and its preparation method and application
  • A core-shell fiber structure electrode and its preparation method and application
  • A core-shell fiber structure electrode and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] a. Preparation of nuclear layer material spinning solution

[0034] Dissolve a certain mass of perfluorosulfonic acid polyions in a mixed solvent of water and methanol with a volume ratio of 1:1, with a mass concentration of 5%, then add polyacrylic acid, with a mass concentration of 5%, and stir for 12 hours at room temperature , ready to use after fully dissolving evenly.

[0035] b. Electrospinning preparation of core layer structure

[0036] The spinning solution prepared in the above step a was placed in the spinning injection device, the feed rate was 2mL / min, the distance between the needle and the receiver was 10cm, the spinning potential was 20kV, the controlled ambient temperature was 25 degrees Celsius, and the humidity was 50%. The prepared fiber structure material is ready for use.

[0037] c. Magnetron sputtering preparation of shell structure

[0038] Add a certain mass of chloroplatinic acid into a mixed solvent with a volume ratio of deionized water ...

Embodiment 2

[0057] a. Preparation of nuclear layer material spinning solution

[0058] Dissolve a certain amount of polybenzimidazole in dimethylformamide with a mass concentration of 10%, then add it into polyvinylpyrrolidone with a mass concentration of 6%, stir for 48 hours at 50°C, and wait until fully dissolved and uniform use.

[0059] b. Electrospinning preparation of core layer structure

[0060] The spinning solution prepared in the above step a was placed in the spinning injection device, the feed rate was 0.5mL / min, the distance between the needle and the receiver was 5cm, the spinning potential was 10kV, the controlled ambient temperature was 40 degrees Celsius, and the humidity was 80%. The prepared fiber structure material is ready for use.

[0061] c. Magnetron sputtering preparation of shell structure

[0062] Mix a certain quality of chloroplatinic acid and nickel nitrate according to the ratio of the amount of substances to 1:1, add water and methanol to a mixed solve...

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Abstract

The invention relates to a core-shell structure electrode. The electrode material is a core-shell fiber structure with a fiber filament as the core and a film wrapped on the outer surface of the fiber filament as the shell layer. The diameter of the core-shell fiber structure ranges from 20 -5000nm, the ratio of the thickness of the shell to the radius of the core layer is between 10:1 and 1:10; the surface of the shell structure also includes an array structure composed of nano-scale columnar crystals perpendicular to the surface of the shell film, and the diameter of the columnar crystals is The range is 2-20nm, and the length is in the range 2-1000nm. This structural electrode has adjustable inner fiber diameter, shell thickness, core-shell ratio, and shell composition. It can be used in proton exchange membrane fuel cells, direct liquid fuel cells, metal-air batteries, and high-temperature polymer electrolyte membranes. In electrodes such as fuel cells.

Description

technical field [0001] The invention relates to a novel core-shell structure electrode and its preparation method. Specifically, the core-shell structure electrode has adjustable inner fiber diameter, shell thickness, core-shell ratio, and shell composition. It can be used in In electrodes such as proton exchange membrane fuel cells, direct liquid fuel cells, metal-air batteries and high-temperature polymer electrolyte membrane fuel cells. [0002] The present invention also relates to a method for preparing the above-mentioned composite material. Background technique [0003] Porous nanofibers are a new type of nanostructured material developed in recent years. Due to the advantages of high electrochemical surface area, small density, and flexible and adjustable structure, porous nanofibers are widely used in catalysis, medicine, and sensing. prospect. [0004] The electrospinning method is one of the most convenient, direct and economical methods to produce porous nanofi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/92B82Y30/00
CPCB82Y30/00H01M4/9041H01M4/9075H01M4/9083H01M4/921H01M4/925Y02E60/50
Inventor 王素力夏章讯孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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