METHOD FOR PRODUCING ROLL-TYPE GAS DIFFUSION LAYER HAVING EXCELLENT SPREADING PROPERTY

In the present invention, a roll-type gas diffusion layer is produced by preparing a carbon paper by using carbon fiber chops having a low modulus of 10 to 100 Gpa; impregnating the prepared carbon paper with a phenol resin or the like, and then carbonizing the same at 1,800 to 2,400°C; forming a mi...

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Bibliographische Detailangaben
Hauptverfasser:	YOON, Joon Young, YONG, Da Kyoung
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS BASIC ELECTRIC ELEMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS ELECTRICITY IMPREGNATING OR COATING OF PAPER NATURAL OR ARTIFICIAL THREADS OR FIBRES PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY PRODUCTION OF CELLULOSE PULP COMPOSITIONS SPINNING TEXTILES TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
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Beschreibung
Zusammenfassung:	In the present invention, a roll-type gas diffusion layer is produced by preparing a carbon paper by using carbon fiber chops having a low modulus of 10 to 100 Gpa; impregnating the prepared carbon paper with a phenol resin or the like, and then carbonizing the same at 1,800 to 2,400°C; forming a microporous polytetrafluoroethylene resin layer on one of both sides of the carbonized carbon paper, thus to prepare a sheet-like gas diffusion layer; and then, winding the prepared sheet-like gas diffusion layer on a roll. Since the roll-type gas diffusion layer produced by the present invention is formed by using the carbon fiber chops having a low modulus, the gas diffusion layer cut into a sheet form is evenly spreading without lifting, that is, exhibits excellent spreading properties. Therefore, sealing between the gas diffusion layer and the fuel cell separation plate is reliably secured without using a separate binder, thereby eliminating problems such as leakage or flooding, and preventing a deterioration in electrical conductivity due to use of a separate binder.