Modified carbon products, their use in fluid/gas diffusion layers and similar devices and methods relating to the same

a technology of carbon products and fluids, applied in the direction of physical/chemical process catalysts, non-metal conductors, sustainable manufacturing/processing, etc., can solve the problems of reduced electrical performance and reduced porosity in the gas/fluid diffusion layer

Inactive Publication Date: 2005-10-20
CABOT CORP
View PDF47 Cites 75 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of such materials often results in decreased electrical performance and decreased porosity in the gas / fluid diffusion layer.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified carbon products, their use in fluid/gas diffusion layers and similar devices and methods relating to the same
  • Modified carbon products, their use in fluid/gas diffusion layers and similar devices and methods relating to the same
  • Modified carbon products, their use in fluid/gas diffusion layers and similar devices and methods relating to the same

Examples

Experimental program
Comparison scheme
Effect test

examples

1. Printed SO3H and CF3 Terminated VULCAN XC-72 Microporous Layer

[0240] A solution containing ArNH2, NaNO2 and HCL (where Ar is —C6H6—SO3H), is added to a solution containing unmodified VULCAN XC-72 to form the diazonium salt, ArN≡N:+Cl− which in turn reacts with the surface of the VULCAN XC-72 to form the modified carbon black (MCB) product. The quantity of diazonium salt formed is sufficient to only give a partial surface coverage, 0.4 μmol / m2. The resulting MCB is isolated and redispersed in deionized water. To this solution additional ArNH2, NaNO2 and HCI are added. However, in this case Ar is —C6H6—CF3. The resulting reactions yield a MCB product containing 0.4 μmol / m2 SO3 groups and 0.2 umol / m2 CF3 groups, approximate total loading of MCBs is 0.6 μmol / m2. The resulting MCB is then dispersed in a low viscosity ink, i.e., dispersed in deionized water and is sprayed onto the surface of a carbon cloth GDL to form the microporous layer. The resulting mix of hydrophobic / hydrophili...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

Gas / Fluid diffusion layers incorporating modified carbon products. The modified carbon products advantageously enhance the properties of gas / fluid diffusion layers, leading to more efficiency within a fuel cell or similar device incorporating the gas / fluid diffusion layer.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS AND CLAIM OF PRIORITY BENEFIT [0001] Pursuant to 35 U.S.C. §119(e), this patent application claims a priority benefit to: (a) U.S. Provisional Patent Application No. 60 / 553,612 entitled “MODIFIED CARBON PRODUCTS AND THEIR USE IN GAS DIFFUSION LAYERS” filed Mar. 15, 2004; (b) U.S. Provisional Patent Application No. 60 / 553,413 entitled “MODIFIED CARBON PRODUCTS AND THEIR USE IN ELECTROCATALYSTS AND ELECTRODE LAYERS” filed Mar. 15, 2004; (c) U.S. Provisional Patent Application No. 60 / 553,672 entitled “MODIFIED CARBON PRODUCTS AND THEIR USE IN PROTON EXCHANGE MEMBRANES” filed Mar. 15, 2004; and (d) U.S. Provisional Patent Application No. 60 / 553,611 entitled “MODIFIED CARBON PRODUCTS AND THEIR USE IN BIPOLAR PLATES” filed Mar. 15, 2004. This application is also related to U.S. Patent Application Serial No. ______, entitled “MODIFIED CARBON PRODUCTS, THEIR USE IN BIPOLAR PLATES AND SIMILAR DEVICES AND METHODS RELATING TO THE SAME”, filed on Mar. 15,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(United States)
IPC IPC(8): B01J21/18B01J23/42B01J23/46B01J23/89B01J37/02B01J37/08C08J5/22H01B1/12H01M2/00H01M2/02H01M2/14H01M4/86H01M4/88H01M4/90H01M4/92H01M4/94H01M4/96H01M8/00H01M8/02H01M8/10
CPCB01J21/18Y02E60/523B01J23/462B01J23/8926B01J37/0207B01J37/084C08J5/22H01B1/122H01M4/86H01M4/8636H01M4/8652H01M4/8817H01M4/886H01M4/90H01M4/9083H01M4/921H01M4/926H01M8/0213H01M8/0234H01M8/0245H01M8/0291H01M8/1004H01M8/1011H01M8/1023H01M8/1025H01M8/1027H01M8/103H01M8/1032H01M8/1034H01M8/1039H01M8/1048H01M8/1081H01M2300/0094B01J23/42H01M8/0289Y02E60/50Y02P70/50H01M8/10
Inventor HAMPDEN-SMITH, MARK J.ATANASSOVA, PAOLINARICE, GORDON L.CARUSO, JAMESBREWSTER, JAMESBHATIA, RIMPLANAPOLITANO, PAULGURAU, BOGDAN
Owner CABOT CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap