Diffusion layer for integral regeneratable fuel cell and preparation thereof

A fuel cell and diffusion layer technology, which is applied in the direction of regenerative fuel cells, fuel cell parts, fuel cells, etc., can solve the problems of intermetallic compound URFC diffusion layer raw materials, etc., achieve superior electrical conductivity, improve cycle life, The effect of good conductivity

Inactive Publication Date: 2009-05-27
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

At present, there are no related reports on the use of intermetallic compounds as raw materials for URFC diffusion layers

Method used

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  • Diffusion layer for integral regeneratable fuel cell and preparation thereof
  • Diffusion layer for integral regeneratable fuel cell and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 100 mg of TiC powder with a particle size of 8 nanometers and add it to 10 ml of 2 mol / L hydrochloric acid solution, ultrasonically treat it for 15 minutes, filter and dry to obtain 90 mg of relatively pure TiC powder.

[0042] Mix 80 mg of the obtained TiC powder with Ir with a particle size of 10 nm at a mass ratio of 4:1, add 90 g of the mixture to 10 ml of isopropanol, add 10 mg of PTFE, and ultrasonically treat the mixture to obtain a viscous liquid . The viscous solution is evenly coated on 7wt% PTFE, porosity 60%, thickness 190 microns, area 20cm 2 The carbon paper was sintered at 260° C. for 30 minutes, sintered at 360° C. for 30 minutes, and naturally cooled to obtain the anode diffusion layer with a thickness of 220 microns and a porosity of 50% according to the present invention.

[0043] Preparation of integrated renewable fuel cell core chip MEA: fully disperse and mix catalyst, Nafion solution and 5ml isopropanol solution in ultrasonic wave to obtain...

Embodiment 2

[0055] Take 100 mg of ZrN powder with a particle size of 50 nanometers and add it to 40 ml of 1 mol / L hydrochloric acid solution, ultrasonicate for 60 minutes, filter and dry to obtain 95 mg of relatively pure ZrN powder.

[0056] Get the obtained ZrN powder 90mg, particle diameter is the IrO of 40nm 2 / TiN5mg, IrO with a particle size of 20nm 2 Mix 5 mg, add 40 g of the mixture to 10 ml of ethylene glycol, add 60 mg of PTFE, and ultrasonicate the mixture to obtain a viscous liquid. Apply the viscous solution evenly on the surface containing 35wt% PTFE, with a porosity of 40%, a thickness of 400 microns, and an area of ​​20 cm 2 The carbon paper was sintered at 270° C. for 80 minutes, and then sintered at 370° C. for 80 minutes. After natural cooling, the anode diffusion layer with a thickness of 425 microns and a porosity of 30% according to the present invention was obtained.

[0057] Single cell assembly and testing The operating conditions of the single cell are the same...

Embodiment 3

[0059] Take 100 mg of (TiAl)(CN) powder with a particle size of 80 nm and add it to 20 ml of 1 mol / L hydrochloric acid solution, ultrasonicate for 30 minutes, filter and dry to obtain 90 mg of relatively pure (TiAl)(CN) powder.

[0060] Get 50 mg of the obtained (TiAl) (CN) powder and mix it with IrRu / Ti with a particle size of 90 nm according to the mass ratio of 1:1. Put 30 g of the mixture into 1 ml of propanol and 3 mL of ethanol, then add 20 mg of PTFE, and ultrasonically treat it. Mix well to obtain a viscous liquid. Evenly scrape the viscous solution on the surface containing 20wt% PTFE, with a porosity of 65%, a thickness of 280 microns, and an area of ​​20 cm 2 The titanium fibers were sintered at 260°C for 60 minutes, sintered at 360°C for 60 minutes, and cooled naturally to obtain the anode diffusion layer with a thickness of 310 microns and a porosity of 50% according to the present invention.

[0061] The preparation of the integrated renewable fuel cell core chi...

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Abstract

The invention relates to a diffusion layer for an integrated regenerative fuel battery and preparation thereof. The diffusion layer consists of a substrate layer and a microporous layer which is coated on the substrate layer, wherein the microporous layer is formed by mixing an intermetallic compound and noble metal catalyst with a mass ratio of between 0.1:1 and 1:0.1. Compared with the prior art, the diffusion layer has the advantages that: firstly, the diffusion layer has good electrical conductivity; secondly, the diffusion layer has good chemical stability and electrochemical stability and superior corrosion resistance; thirdly, the diffusion layer has low cost; and fourthly, the diffusion layer has simple process and is easy to realize industrialization. Therefore, the novel diffusion layer adopting the intermetallic compound can obviously improve the cycle life of the regenerative fuel battery. The diffusion layer for the regenerative fuel battery with low cost and high durability can be prepared by the method. A regenerative fuel battery chip MEA and a single battery prepared by the prepared diffusion layer have good output performance.

Description

technical field [0001] The invention relates to an integrated renewable fuel cell diffusion layer, in particular to the integrated renewable fuel cell diffusion layer and its preparation. Background technique [0002] The unitized regenerative fuel cell (URFC for short) is a kind of regenerative fuel cell (RFC for short). Its specific energy is as high as 400-1000Wh / Kg, which is several times that of other high-energy secondary batteries such as lithium-ion batteries. Compared with the separate RFC, the URFC system is simple, low in cost, high in specific energy and specific power, and easy to miniaturize. Because URFC can meet the energy storage requirements of long-term charging and discharging, its application prospect is very broad, especially in the field of space power supply, which has incomparable advantages. [0003] URFC can carry out two working modes on the same component, that is, fuel cell mode and water electrolysis mode. When operating in fuel cell mode, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86H01M4/88H01M8/18H01M8/0245
CPCY02E60/528Y02E60/50
Inventor 张华民陈国宝
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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