Fibrous electrode material, preparation and application thereof

Patent metadata

Field	Value
Publication number	US-12191503-B2
Application number	US-201917595033-A
Country	US
Kind code	B2
Filing date	Dec 16, 2019
Priority date	Dec 10, 2019
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

An electrode material of a fibrous structure has a platinum-based electrocatalytic material, an electrospinning polymer material, and an oxide material and/or one or more organophosphorus acid material with ion conduction. In the micromorphology has the structure of nanofibers, but also has porous morphological characteristics, the electrode material of this structure is prepared by electrostatic spinning technology, can be used as a high-temperature polymer electrolyte membrane fuel cell porous electrode.

First claim

The invention claimed is:

1. A fibrous electrode material, comprising: an active electrocatalytic material, polymer fibers, an oxide material, and an organophosphorus acid,
wherein the polymer fibers are interwoven to form a carrier, the oxide material is affixed to the carrier and forms a porous structure, and the organophosphorus acid is affixed to the carrier, and
the active electrocatalytic material is deposited on the porous structure of the oxide material affixed to the carrier,
wherein the porous structure of the oxide material has a pore size ranging from 1 nm to 50 nm and a porosity of 40 to 60%, and the active electrocatalytic material is in form of nanoparticles having a diameter of 2-10 nm.

2. The fibrous electrode material according to claim 1 , wherein the active electrocatalytic material comprises platinum, one or more platinum alloys, or both, wherein the platinum alloy comprises platinum and one or more metal selected from iron, nickel, cobalt, copper, gold, silver, and palladium; the oxide material comprises one or more composition selected from silicon oxide, titanium oxide, tungsten oxide, and indium tin oxide; the organic phosphoric acid is one or more selected from perfluorophosphate polymer, polycarboxylate phosphate, polycarboxylate phosphite, and phosphorous-containing heteropoly acid; the polymer material comprises one or more selected from polyacrylic acid, polyethylene oxide, and polyvinylpyrrolidone.

3. The fibrous electrode material according to claim 1 , wherein, in the platinum alloy, a mass ratio between platinum and a remainder of the platinum alloy is 5:1 to 1:5.

4. A preparation method for preparing the fibrous electrode material of claim 1 , comprising:
dissolving a precursor of platinum, and optionally precursors of one or more metals selected from iron, nickel, cobalt, copper, gold, silver, and palladium in a solvent to form a first solution;
adding the oxide material and the organophosphorus acid to the solution to so that a mass concentration of the oxide material is 1% to 10%, a mass concentration of the organophosphorus acid is 0.1% to 5% to form a second solution,
adding a polymer material to the second solution so that a mass concentration of the polymer material is 1% to 20% at room temperature to 60-80° C. to form a composite solution;
continuously mixing conditions the composite solution at 80 to 140° C. for 2 h to 8 h and cooling to room temperature to form a colloidal spinning solution; and
carrying out electrostatic spinning to obtain the fibrous electrode material.

5. The preparation method according to claim 4 , wherein the electrostatic spinning process comprises: feeding the spinning colloid solution into a spinning injection device at a rate of 0.1 to 2 mL/min at a spinning potential of 10 to 30 kV for a spinning time is 10 to 600.

6. The preparation method according to claim 4 , wherein the precursor of platinum is one or more of chloroplatinic acid, platinum acetate and dinitro diamine platinum, the solvent is one or more selected from water, dimethylformamide, methanol, ethylene glycol, and ethanol, the organophosphorus acid is selected from perfluorophosphate polymer, polycarboxylate phosphate, polycarboxylate phosphite, and phosphorous-containing heteropoly acid, and the polymer material is one or more selected from polyacrylic acid, polyethylene oxide, and polyvinylpyrrolidone.

7. A polymer electrolyte membrane fuel cell, comprising a membrane that comprises the fibrous electrode material according to claim 1 .

Assignees

• Dalian Inst Chem & Physics Cas

Inventors

• Wang Suli
• Xia Zhangxun
• Sun Gongquan

Classifications

• H01M8/1018

  Polymeric electrolyte materials · CPC title

• H01M4/921

  Alloys or mixtures with metallic elements · CPC title

• H01M4/8825

  Methods for deposition of the catalytic active composition · CPC title

• D01F9/08

  of inorganic material (working or processing of metal wire B21F; from softened glass, minerals or slags C03B37/00) · CPC title

• D01D5/0015

  characterised by the initial state of the material · CPC title