Electrode material with fiber structure and preparation and application

A technology of electrode material and fiber structure, which is applied in the field of new composite fiber structure electrodes and its preparation, can solve the problems of difficult to achieve electrode performance, uncontrollable porosity, pore size and channel shape, and difficult to achieve in-depth research on electrode performance. High utilization rate, increased porosity, and improved performance

Pending Publication Date: 2021-06-11
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

In the traditional electrode preparation method, the electrode layer formed by cross-linking and stacking the electrode material slurry on the substrate through various coating technologies often has uncontrollable porosity, pore size and channel shape, and it is difficult to realize the structure and efficiency of the electrode. In-depth research, it is also difficult to improve the performance of the electrode

Method used

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  • Electrode material with fiber structure and preparation and application
  • Electrode material with fiber structure and preparation and application
  • Electrode material with fiber structure and preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] a. Preparation of composite spinning solution

[0038] A certain mass of chloroplatinic acid was added into the dimethylformamide solvent so that the mass concentration of the precious metal was 5%, and it was fully dissolved for later use. A certain mass of perfluorophosphate polyion was added to the above solution to make the mass concentration 0.5%, and stirred for 2 hours. A certain mass of polyacrylic acid was added to the above solution to make the mass concentration 5%, and stirred for 2 hours at room temperature, fully dissolved and uniform before use.

[0039] The above composite solution was heated to 120° C. in an oil bath under continuous stirring, continued to react for 4 hours, cooled to room temperature, and continued to stir for 1 hour before use.

[0040] b. Electrospinning preparation of fiber-structured electrode materials

[0041] Place the spinning colloid solution prepared in the above step a at the inlet of the spinning injection device, the feed ...

Embodiment 2

[0055] a. Preparation of composite spinning solution

[0056] A certain mass of chloroplatinic acid and cobalt nitrate was added to the dimethylformamide solvent, so that the mass concentration of the noble metal was 5%, and the molar ratio of the noble metal to cobalt was 5:1, fully dissolved for later use. A certain mass of perfluorophosphate polyion was added to the above solution to make the mass concentration 0.5%, and stirred for 2 hours. A certain mass of polyacrylic acid was added to the above solution to make the mass concentration 5%, and stirred for 2 hours at room temperature, fully dissolved and uniform before use.

[0057] The above composite solution was heated to 120° C. in an oil bath under continuous stirring, continued to react for 4 hours, cooled to room temperature, and continued to stir for 1 hour before use.

[0058] b. Electrospinning preparation of fiber-structured electrode materials

[0059] Place the spinning colloid solution prepared in the above...

Embodiment 3

[0062] a. Preparation of composite spinning solution

[0063] Add a certain mass of chloroplatinic acid and nickel nitrate into the dimethylformamide solvent so that the mass concentration of the noble metal is 5%, and the molar ratio of the noble metal to cobalt is 3:1, fully dissolved and then used. A certain mass of phosphonic acid subunit polycarboxylic acid was added to the above solution to make the mass concentration 0.5%, and stirred for 2 hours. A certain mass of polyacrylic acid was added to the above solution to make the mass concentration 5%, and stirred for 2 hours at room temperature, fully dissolved and uniform before use.

[0064] The above composite solution was heated to 120° C. in an oil bath under continuous stirring, continued to react for 4 hours, cooled to room temperature, and continued to stir for 1 hour before use.

[0065] b. Electrospinning preparation of fiber-structured electrode materials

[0066] Place the spinning colloid solution prepared in...

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Abstract

The invention relates to a novel composite fiber structure electrode and a preparation method and application thereof, in particular to a fiber structure electrode which is of a micron or submicron nanofiber structure. The diameter size range is 20-500 nm, the fiber structure further comprises a porous structure with the nanoscale pore size, and the pore size range is 1-50 nm. The porosity of the electrode material is 20-80%, and the electrode material is composed of a noble metal catalyst, an organic phosphate-based material and a spinning polymer, and has an adjustable fiber diameter, an adjustable fiber component ratio and an adjustable porosity. The structure is ordered and controllable; the fiber diameter and the pore density of the fiber structure electrode material prepared by the method disclosed by the invention can be controlled through preparation process parameters; the electrode material has the characteristics of good mass transfer performance, high precious metal utilization rate, high ion transmission efficiency, strong practicability and the like, can be used as a porous electrode of a high-temperature polymer electrolyte membrane fuel cell, and is used in a high-temperature proton exchange membrane fuel cell electrode.

Description

technical field [0001] The invention relates to a novel composite fiber structure electrode and a preparation method thereof. Specifically, the fiber structure electrode is composed of a noble metal catalyst, an organic phosphoric acid-based material and a spinning polymer, and has adjustable fiber diameter, fiber composition ratio, The porosity can be adjusted, and it can be used in high-temperature proton exchange membrane fuel cell electrodes. [0002] The present invention also relates to a method for preparing the above-mentioned composite material. Background technique [0003] High-temperature (150-200°C) polymer electrolyte membrane fuel cells based on phosphoric acid electrolytes, due to their higher operating temperature, faster kinetics of the electrode reaction process and stronger tolerance to poisonous species such as CO on the anode, are a promising alternative. This is a new type of fuel cell technology with great potential, which can directly utilize hydrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M8/22B82Y40/00
CPCH01M4/8605H01M4/8875H01M8/22B82Y40/00H01M2004/8684Y02E60/50
Inventor 王素力夏章讯孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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