Celanese Ventures Gmbh

Hoescht Research & Technology Deutschland Gmbh & Co. Kg

Axiva Gmbh

Gregor Deckers

Georg Frank

Harald B&ouml;nsel

Thomas Soczka-Guth

Hans Millauer

Helmut B Witteler

Arnold Schneller

Michael Heine

Joachim Clauss

Tetsu Yamamoto

R&uuml;diger Knauf

Helmut Witteler

Arthur Koschany

Christian Lucas

Thomas Schwesinger

Makoto Murata

Kilian Brehl

Mike R&ouml;mmler

J&uuml;rgen Lenze

Polymer-stabilized metal colloid solutions, process for preparing them and their use as catalysts for fuel cells. Process for preparing metal colloid solutions by reacting a platinum compound and, if desired, one or more compounds of Rh, Ru, Ir or Pd with a reducing agent. At least one cation-exchange polymer is used for stabilizing the metal colloid solution.

Polymer-stabilized metal colloid solutions, method for producing said solutions and use of the same as catalysts for fuel cell

Polybetaine stabilized platinum nanoparticles, method for the production thereof and utilization for fuel-cell catalysts

A method for producing a polymer electrolyte membrane is disclosed. A liquid medium is introduced into a cylinder having an inner surface having a cylindrical configuration. The liquid medium has at least one percent by weight of a polymer electrolyte and a solvent having a boiling point or an azeotropic point ranging from 60 to 220&deg; C. Subsequently, the cylinder is rotated for evaporating the solvent by means of a centrifugal force created by such rotation so as to form a polymer electrolyte membrane having a cylindrical configuration with a substantially uniform thickness on the inner surface of the cylinder. Onto the inner surface of the polymer electrolyte membrane, a catalytic layer containing a catalytic particle may be formed.

Method for producing polymer electrolyte membrane and fuel cell

Process for using microwave irradiation to prepare solutions of polymers functionalized with acid groups The invention relates to a process for preparing aqueous, hydrous and anhydrous solutions of polymers functionalized with acid groups, which comprises using microwave radiation to supply the heat required to prepare the solution. The solutions are suitable as a starting material for producing gas diffusion electrodes, fuel cells and polymer-electrolyte-stabilized platinum nanoparticles.

Method for producing solution of polymers functionalized by acid groups by microwave radiation

A process for producing laminates which contain at least one centrally arranged, ion-conductive membrane which is, at least over a substantial part of its two mutually opposite flat faces, electrically conductively bonded to at least one catalytically active substance and to at least one two-dimensional, gas-permeable, electron-conductive contacting material, the bonding of at least two of the said components having been effected by lamination. The process comprises carrying out the bonding of the ion-conductive membrane, of the catalytically active substance and of the electron-conductive contacting material continuously. The ion-conductive membrane is brought together with at least the electron-conductive contacting material in the exact position by means of transport and feeding devices and the two components are laminated and bonded to one another by pressing them together. The range of variation in the a.c. resistances of the laminates produced by the process according to the invention is &plusmn;10%. The laminates are particularly suitable for use in fuel cells or electrolysers.

Process for continuous production of membrane-electrode composites

A particularly inexpensive, homogeneous and porous gas diffusion electrode which comprises at least one electrically conductive, hydrophobic and gas-permeable gas diffusion layer, comprising a mechanically stable support material which is impregnated with at least one electrically conductive material having a bulk conductivity of &gE;10 mS/cm is produced. The gas diffusion electrode can be coated with a catalytically active layer. The electrodes of the invention are particularly suitable for use in fuel cells and electrolysis cells.

Gas diffusion electrode for polymer electrolyte membrane fuel cells

Growing community of inventors

Frankfurt-am-Main, Germany

Gregor Deckers