Hoechst Celanese Corporation

Basf Fuel Cell Gmbh

Other

Celanese Gmbh

The United States of America As Represented by the United States

Aventis Research & Technologies Gmbh & Co Kg

Celanese Ventures Gmbh

Pemeas Gmbh

Avents Research & Technologies Gmbh & Co. Kg

Basf Fuel Cell Research Gmbh

Michael J Sansone

Oemer Uensal

Joachim Kiefer

Gordon Calundann

Frank J Onorato

Eui W Choe

Brian C Benicewicz

Stuart M French

Mark S Kwiatek

Faruq Marikar

Richard S Sapienza

Balaram B Gupta

William A Slegeir

Harris A Goldberg

Anthony J East

Robert W Stackman

Gunilla E Gillberg-LaForce

Naoya Ogata

Edward L Cussler

Dai W Kim

Charles E Forbes

Joseph J Rafalko

Harry S Pulaski

Arthur G Schlask

Ching F Shu

Karsten Blatter

James L McGinnis

Esther A Bower

David K Schisla

Andrew Kindler

Eui Won Choe

The present invention relates to a novel proton-conducting polymer membrane based on polyazoles which can, because of its excellent chemical and thermal properties, be used in a variety of ways and is particularly useful as polymer electrolyte membrane (PEM) to produce membrane electrode units for PEM fuel cells.

Proton-conducting membrane and the use of the same

The present invention relates to a proton-conducting polymer membrane which comprises polyazole blends and is obtainable by a process comprising the steps

Proton-conducting polymer membrane comprising polyazole blends and its use in fuel cells

The present invention relates to a novel proton-conducting polymer membrane based on aromatic polyazoles which contain sulfonic acid groups and in which the sulfonic acid groups are covalently bound to the aromatic ring of the polymer and which can, owing to their excellent chemical and thermal properties, be used for a variety of purposes. Such materials are particularly useful for the production of polymer electrolyte membranes (PEMs) in PEM fuel cells.

Proton-conducting membrane and the use thereof

A proton-conducting polymer membrane comprising polyazoles containing sulfonic acid groups is obtainable by a process comprising:

Proton-conducting polymer membrane comprising sulfonic acid-containing polyazoles, and use thereof in fuel cells

A proton-conducting polymer membrane comprising polyazoles containing phosphonic acid groups is obtainable by a process comprising:

Proton conducting polymer membrane comprising phosphonic acid groups containing polyazoles and the use thereof in fuel cells

Proton-conducting polymer membrane containing polyazole blends, and application thereof in fuel cells

Proton-conducting membrane and use thereof

A method for producing polymeric, e.g., polybenzimidazole (PBI) films, is provided by forming a porous membrane by coagulating a polymeric dope solution in a liquid coagulation bath containing a non-solvent alone or a mixture of a non-solvent and solvent; submerging the resulting membrane into a non-solvent bath to remove any residual solvent; placing the membrane into an acid solution, whereby the pores become filled with the acid solution; and drying the membrane to remove residual non-solvent which collapses the porous structure entrapping the acid and forming a dense film. An alternative method involves coagulating said polymer solution directly into an acid/solvent/non-solvent mixture to produce a porous membrane which imbibes the acid solution, followed by drying.

Process for producing polymeric films for use as fuel cells

A method for producing polybenzimidazole (PBI) fabrics for use as fuel cell or battery electrolytes by soaking a sulfonated or non-sulfonated PBI fabric in an acid solution, whereby the fibers of the fabric become swollen with the acid solution; and drying the fabric to remove residual water or methanol and concentrating the acid.

Process for producing polybenzimidazole fabrics for use in fuel

A method for producing polybenzimidazole (PBI) paste or gel useful in a fuel cell, mixing PBI polymer with a suitable amount of an acid, which permits the polymer to dissolve and form a matrix having a gel-like or paste-like consistency at room temperature.

Process for producing polybenzimidazole pastes and gels for use in fuel

An electrolytic membrane for use in fuel cell includes a fluid-imbibed acidified polybenzimidazole resin. The resin is alkyl or aryl sulfonated or alkyl or aryl phosphonated, preferably with a degree of substitution of from 15 to about 60 per cent.

Acid-modified polybenzimidazole fuel cell elements

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Berkeley Heights, NJ, United States of America

Michael J Sansone