Title:
CATALYST INKS AND METHOD OF APPLICATION FOR DIRECT METHANOL FUEL CELLS
Document Type and Number:
WIPO Patent Application WO2002045188
Kind Code:
A3
Abstract:
Inks are formulated for froming anode and cathode catalyst layers and applied to anode and cathode sides of a membrane for a direct methanol fuel cell. The inks comprise a Pt catalyst for the cathode and a Pt-Ru catalyst for the anode, purified water in an amount 4 to 20 times that of the catalyst by weight, and a perfluorosulfonic acid ionomer in an amount effective to provide an ionomer content in the anode and cathode surfaces of 20% to 80% by volume. The inks are prepared in a two-step process while cooling and agitating the solutions. The final solution is placed in a cooler and continuously agitated while spraying the solution over the anode or cathode surface of the membrane as determined by the catalyst content.
Inventors:
ZELENAY PIOTR
REN XIAOMING
THOMAS SHARON C
DAVEY JOHN
GOTTESFELD SHIMSHON
REN XIAOMING
THOMAS SHARON C
DAVEY JOHN
GOTTESFELD SHIMSHON
Application Number:
PCT/US2001/045619
Publication Date:
August 29, 2002
Filing Date:
October 31, 2001
Export Citation:
Assignee:
UNIV CALIFORNIA (US)
International Classes:
B01J21/00; B01J23/00; B01J25/00; B01J29/00; B01J31/00; H01M4/86; H01M4/88; H01M4/90; H01M4/92; H01M4/96; H01M8/10; H01M; (IPC1-7): B01J31/00; B01J21/00; B01J23/00; B01J25/00; B01J29/00; H01M4/86; H01M4/90; H01M4/96
Foreign References:
| US6303244B1 | 2001-10-16 | |||
| US6146781A | 2000-11-14 | |||
| US5599638A | 1997-02-04 | |||
| US5773162A | 1998-06-30 |
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