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Process for preparing integrated renewable fuel double effect oxygen electrode diffusion layer

A double-effect oxygen electrode and fuel cell technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of high porosity and corrosion resistance, and achieve the effects of improving battery performance, increasing life, and high specific surface area

Inactive Publication Date: 2007-06-27
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

[0012] In order to solve the problem that the double-effect oxygen electrode diffusion layer of an integrated renewable fuel cell requires high strength, light weight, high porosity and high corrosion resistance at the same time, the purpose of the present invention is to provide a double-effect oxygen electrode for an integrated renewable fuel cell. A preparation method for an efficient oxygen electrode with a high specific surface corrosion-resistant integrated diffusion layer; the integrated diffusion layer is a combination of a high-porosity anti-corrosion current collector and a self-supporting anti-corrosion diffusion layer, which not only reduces the gap between the diffusion layer and the current collector The contact resistance improves the battery performance and simplifies the electrode structure

Method used

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  • Process for preparing integrated renewable fuel double effect oxygen electrode diffusion layer

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Effect test

Embodiment 1

[0038] Add 0.9 g of Ir powder into 10% hydrochloric acid solution, heat treatment for 10 min, and suction filter or centrifuge to obtain the treated Ir powder. Add Ir powder to 30ml of H 2 PtC l6 .xH 2 O solution (weight concentration 1.5%), adjust the pH value to 2 with 5% NaOH solution. Add 50 ml of hydrazine hydrochloride solution (weight concentration 15%), reflux for 10 h, filter, and dry to obtain 1 g of Ir powder for electroless Pt plating.

[0039] Weigh 1g of Pt-plated Ir powder, add ethanol, add 5g of PTFE emulsion (weight concentration 10%), and 0.5g of ammonium carbonate, after ultrasonic mixing, the self-supporting diffusion layer precursor is obtained by plasticizing and rolling.

[0040] Add high-porosity titanium mesh (80% porosity) into 10% hydrochloric acid solution, heat it for 10 minutes, take it out, and dry it for later use. Add the titanium mesh to 30ml of H 2 PtC l6 .xH 2 O solution (weight concentration 1.5%), adjust the pH value to 2 with 5% Na...

Embodiment 2

[0043] Add 0.9g of Ti powder into 10% hydrochloric acid solution, heat for 10 minutes, and filter or centrifuge to obtain the treated Ti powder. Add Ti powder to 30ml of H 2 PtCl 6 .xH 2 O solution (weight concentration 1.5%), adjust the pH value to 2 with 5% NaOH solution. Add 50 ml of hydrazine hydrochloride solution (weight concentration 15%), reflux for 10 h, filter, and dry to obtain 1 g of Ti powder for electroless Pt plating.

[0044] Weigh 1g of Pt-plated Ti powder and add ethanol, add 5g PTFE emulsion (weight concentration 10%), and 0.5g ammonium carbonate, after ultrasonic mixing, adopt drawing process to prepare on the PTFE film, remove the PTFE film after hot pressing, A self-supporting diffusion layer precursor is prepared.

[0045] Add high-porosity titanium mesh (80% porosity) into 10% hydrochloric acid solution, heat it for 10 minutes, take it out, and dry it for later use. Add the titanium mesh into the electroless nickel plating solution. The electroles...

Embodiment 3

[0048] Add 0.9g of Ti powder into 10% hydrochloric acid solution, heat for 10 minutes, and filter or centrifuge to obtain the treated Ti powder. 1g RuCl 3 and 1.4g SnCl 4 Dissolve in 50ml of isopropanol, add the treated Ti powder, heat and stir, evaporate the solvent, vacuum dry, and sinter at 500°C for 1h to obtain 1.8g loaded RuO 2 and SnO 2 Ti powder of oxygen evolution catalyst (mass ratio Ti powder: RuO 2 :SnO 2 is 5:2:3).

[0049] Weigh 1g loaded with RuO 2 and SnO 2 Add ethanol to the Ti powder of the oxygen evolution catalyst, add 5g PTFE emulsion (weight concentration 10%), and 0.5g ammonium carbonate, after ultrasonic mixing, scrape coating on the PTFE membrane, remove the PTFE membrane after hot pressing, and obtain an oxygen evolution electrocatalytic Active self-supporting diffusion layer precursor.

[0050] Add high-porosity titanium mesh (80% porosity) into 10% hydrochloric acid solution, heat it for 10 minutes, take it out, and dry it for later use. Ad...

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Abstract

This invention relates to an electric-chemical energy storage cell, especially to a method for preparing diffusion layer of double effect oxygen eledtrode of regenerated fuel cells, 1, eliminating surface oxide film by processing an anti-erosion material with acid solution, 2, depositing a noble metal film on the surface of the anti-erosion material by plating or chemical plating or loading high efficient oxygen-releasing electric catalyst on it, 3, mixing the anti-erosion material after process with water repellent and pore forming agent in an alcohol solvent uniformly to prepare a precursor of a self supporting anti-erosion diffusion layer, 4, eliminating the surface oxide film to the collector by acid to deposit noble metal film by plating or chemical plating, 5, compacting the precursor and the collector together to bake and get a high ratio surface anti-erosion integrated diffusion layer.

Description

technical field [0001] The invention relates to an electrochemical energy storage battery, in particular to a method for preparing a high specific surface corrosion-resistant integrated diffusion layer for an integrated renewable fuel cell double-effect oxygen electrode, and the prepared integrated renewable fuel cell double-effect oxygen The electrode diffusion layer can be widely used in aerospace power storage systems, electric vehicle energy, power grid peak regulation, and space vehicle propulsion systems and other fields. Background technique [0002] Renewable fuel cell (Regenerative Fuel Cell System, RFC for short) is an energy storage system with extremely high specific energy that is very promising to replace traditional secondary batteries, and the specific energy can be as high as 400Whkg -1 The above is several times the specific energy of the lightest high-energy secondary battery at present, and has a very broad application prospect in space power supply or la...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 张华民宋世栋邵志刚马霄平衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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