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:
Aug. 10, 1999
Filed:
Dec. 16, 1997
Rak-Hyun Song, Taejon, KR;
Dong-Ryul Shin, Taejon, KR;
Chang-Soo Kim, Taejon, KR;
Byung-Rok Lee, Taejon, KR;
Korea Institute of Energy Research, Taejon, KR;
Abstract
There is disclosed a method for manufacturing an electrode for phosphate type fuel cells, utilizing a combination of a coating process and a rolling process. Carbon paper is waterproofed to give an electrode support. Separately, platinum-dispersed carbon powder (Pt/C) is added in a solvent and mechanically stirred to give a homogeneous mixture which is, then, added with a PTFE emulsion at an amount of about 40-55 wt % and stirred. Another stirring is executed in the presence of a bridge-builder and a peptization agent, to produce an electrocatalyst layer slurry. Using a coating apparatus, the electrocatalyst slurry is coated upon the electrode support in a uniform thickness. The resulting structure is dried for 30 min in an inert atmosphere of 225.degree. C. to completely remove the solvent from the catalyst layer, passed through a rolling apparatus and subjected to sintering for 30 min in an inert atmosphere of 350.degree. C., to produce the electrode. It exhibits the advantages of few cracks in the electrocatalyst layer and strong adhesiveness between the electrode support and the electrocatalyst layer.