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MANUFACTURABILITY OF ePTFE LAMINATED MEMBRANES

A laminated film and reinforcement layer technology, applied in sustainable manufacturing/processing, final product manufacturing, climate sustainability, etc., can solve problems such as time-consuming cost, complex fuel cell components, etc., to increase process efficiency and increase inhalation speed effect

Active Publication Date: 2014-09-17
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With conventional coating operations, the process of manufacturing fuel cell components is complex, time-consuming and costly, especially if the number of component layers is high and the coating and drying equipment is repeated

Method used

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  • MANUFACTURABILITY OF ePTFE LAMINATED MEMBRANES
  • MANUFACTURABILITY OF ePTFE LAMINATED MEMBRANES
  • MANUFACTURABILITY OF ePTFE LAMINATED MEMBRANES

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0120] comparison example

[0121] The cathode ink was prepared by adding 11.69 g of 30% Pt alloy catalyst (supplied by Tanaka Kikinzoku International) and 1080 g of 5 mm spherical zirconia grinding media to the first 500 ml polyethylene bottle. In a second 250 ml polyethylene bottle, 13.02 g of 900 equivalent weight (EW) ionomer (28 wt% solids, 42 wt% ethanol, 30 wt% water) and 5.79 g of 700 EW ionomer (20.5 wt% solid, 79.5 wt% water) and 64.8 g of ethanol, 38.52 g of water, and 1.16 g of 26.7 wt% oleamide, 55 wt% n-propanol, and 18.3 wt% aqueous solution, and the contents were stirred for about 15 minutes . The ionomer solution from the second bottle was then added to the catalyst and milling media in the first bottle. The first bottle was then placed on the ball mill and spun at 145 RPM for 72 hours.

[0122] A 125 ml polyethylene bottle was prepared by adding 38.76 g of 650 EW ionomer dispersion (20.4 wt% solids, 47.8 wt% water and 31.8% ethanol), 28.79 g of ethanol and...

example 2

[0125]To demonstrate the improved manufacturability of the presented method compared to Example 1, by adding 11.69 g of 30% Pt alloy catalyst (supplied by Tanaka Kikinzoku International) and 1080 g of 5 mm spherical zirconia ground to the first 500 ml polyethylene bottle medium to prepare cathode ink. In a second 250 ml polyethylene bottle, 13.02 g of 900 equivalent weight (EW) ionomer (28 wt% solids, 42 wt% ethanol, 30 wt% water) and 5.79 g of 700 EW ionomer (20.5 wt% solid, 79.5 wt% water) and 64.8 g of ethanol, 38.52 g of water, and 1.16 g of 26.7 wt% oleamide, 55 wt% n-propanol, and 18.3 wt% aqueous solution, and the contents were stirred for about 15 minutes . The ionomer solution from the second bottle was then added to the catalyst and milling media in the first bottle. The first bottle was then placed on a ball mill and spun at 145 RPM for 72 hours to form a catalyst ink fluid.

[0126] The first was prepared by adding 78.92 g of 650 EW ionomer dispersion (20.4 wt% ...

example 3

[0131] To demonstrate the applicability of the presented method to both cathode and anode electrodes, 6.62 g of 20%Pt graphitized Vulcan catalyst (supplied by Tanaka Kikinzoku International) and 520 g of 5 mm spherical Zirconia grinding media to prepare the anode ink fluid. In a second 250 ml polyethylene bottle, add 22.53 g of 900 equivalent weight (EW) ionomer (28 wt% solids, 42 wt% ethanol, 30 wt% water), 20.75 g of ethanol, 13.72 g of water and 1.39 g 26.7 wt% oleamide, 55 wt% n-propanol and 18.3 wt% aqueous solution and stir the contents for about 15 minutes. The ionomer solution from the second bottle was then added to the catalyst and milling media in the first bottle. The first bottle was then placed on a ball mill and spun at 125 RPM for 72 hours.

[0132] The second was prepared by adding 78.92 g of 650 EW ionomer dispersion (20.4 wt% solids, 47.8 wt% water and 31.8% ethanol), 34.21 g of ethanol and 1.87 g of water to a 250 ml polyethylene bottle and allowed to mix...

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Abstract

Methods for manufacturing laminated membranes for MEAs, such methods comprising (i) providing a substrate, a catalyst ink fluid, and a first membrane fluid; (ii) providing a second membrane fluid; (iii) simultaneously coating the catalyst ink fluid onto the substrate, the first membrane fluid onto the catalyst ink fluid, and the second membrane fluid onto the first membrane fluid; and (iv) applying a reinforcement layer (such as ePTFE) and allowing for full imbibement. The second membrane fluid (i) consists of alcohol or (ii) is an alcohol-rich fluid comprising polymer electrolyte.

Description

technical field [0001] The present disclosure relates generally to processes for coating fuel cell components, and more specifically, it relates to improved processes for making laminated films. Background technique [0002] Electrochemical conversion cells, commonly referred to as fuel cells, generate electricity by processing reactants such as hydrogen and oxygen through oxidation and reduction. A polymer electrolyte fuel cell may include a polymer membrane [eg, a proton exchange membrane (PEM)] with catalyst electrode layers on both sides. A catalyst coated PEM may be positioned between a pair of gas diffusion media (GDM) with the cathode and anode plates placed outside the gas diffusion media layer. Alternatively, a catalyst coated diffusion media (DM) layer may be used. [0003] There are many components of a membrane electrode assembly (MEA) that can be combined in layers, including electrode ink layers, microporous layers, and membrane layers. One or more such laye...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCY02E60/521H01M8/1081H01M4/8882H01M4/8807H01M4/8828H01M4/8668H01M8/1018H01M2008/1095H01M4/8878Y10T156/10Y02P70/50Y02E60/50
Inventor B.M.霍塔林
Owner GM GLOBAL TECH OPERATIONS LLC
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