The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2001
Filed:
Sep. 08, 1998
Chang-Soo Kim, Taejon, KR;
Young-Gap Chun, Taejon, KR;
Dong-Hyun Peck, Kumpo-shi, KR;
Dong Ryul Shin, Taejon, KR;
Korea Institute of Energy Research, Taejon, KR;
Abstract
A method for fabricating an electrode and membrane assembly (MEA) for polymer electrolyte membrane fuel cells. The MEA comprises a polymer electrolyte membrane on each side of which an electrocatalyst layer is provided in a melted state. A perfluorosulfonyl fluoride copolymer powder ranging, in particle size distribution, from 20 to 200 &mgr;m is hot-pressed at 200-250° C. to give a pre-formed sheet whose opposite sides are then coated with a catalyst ink consisting of Pt/C powder, glycerol and water. This catalyst ink-coated preformed sheet is again subjected to hot pressing at 200-250° C. to embed the catalyst ink into the pre-formed sheet. Hydrolysis in NaOH/methanol or H,SO,solution converts the membrane of the sheet from a non-ionized form to an ionized form.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile