Celanese Ventures Gmbh

Daimler Ag

U.S. Philips Corporation

Basf Fuel Cell Gmbh

Axiva Gmbh

Pemeas Gmbh

Hoescht Research & Technology Deutschland Gmbh & Co. Kg

Aventis R Search & Technology Gmbh & Co. Kg

Thomas Soczka-Guth

Georg Frank

Jochen Baurmeister

Hans Millauer

Helmut B Witteler

Joachim Kiefer

Norbert Wiesheu

Gregor Deckers

Harald B&ouml;nsel

R&uuml;diger Knauf

Rudiger Knauf

Joachim Clauss

Joachim Maier

Edsko E Havinga

Johann German

Christoph Padberg

Frauke Jordt

Gert Hinsenkamp

Klaus-Dieter Kreuer

Arthur Koschany

Christian Lucas

Thomas Schwesinger

Wei Cui

Florian Finsterwalder

Annette Fuchs

Klaus A Mullen

Alexander Dyck

Manuel Christian Schaloske

J&uuml;rgen Pawlik

Robert Ritter

J&uuml;rgen Lenze

Kilian Brehl

Jurgen Pawlik

Rüdiger Knauf

Polymer electrolyte membrane (PEM) made from perfluorosulfonic acid polymers, displaying proton conductivity at least in the presence of water, adequate for operation in a fuel cell, comprising at least one oxidation protection agent and additives. The PEM is an acid/base polymer blend which forms acidic and basic domains, the basic polymer being formed by polybenzimidazole (PBI) and the at least one oxidation protection agent being formed by manganese oxide.

Oxidation-stabilised polymer electrolyte membrane for fuel cells

In a method for producing a heat exchanger tube bundle for a heat exchanger of an electrochemical energy accumulators, heat exchanger channels and an intended profile are incorporated into material strips by deep drawing. A forward-flow distribution aperture is incorporated into a first such material strip from step b) (first heat exchanger plate), and return collecting apertures are incorporated into a second such material strip, forming first and the second heat exchanger plates. The latter are aligned in such a manner that webs of the two heat exchanger plates border each other, and the heat exchanger channels form heat exchanger tubes. The heat exchanger plates arranged in this manner are joined together to form a heat exchanger tube bundle. A corresponding pressure welding apparatus, a heat exchanger tube bundle, a heat exchanger module, a heat exchanger with two or more heat exchanger modules, and an electrochemical energy accumulator with a heat exchanger of this type are also disclosed.

Heat exchanger comprising deep-drawn heat exchanger plates

An acid-doped, single-layer or multilayer polymer membrane comprising at least one layer A of a polymer blend with contains: a) from 0.1 to 99.9% by weight of one or more polymers comprising recurring azole units of the formula 1A and/or 1B: wherein the radicals Ar, Ar, and Arare tetravalent, divalent or trivalent aromatic or heteroaromatic groups and the radicals X are each and oxygen atom, a sulfur atom or an amino group bearing a hydrogen atom, a 1-20 carbon group, in admixture withb) from 99.9 to 0.1% by weight of a polysulfone containing recurring unit having no sulfonic acid groups.

Membranes having improved mechanical properties, for use in fuel cells

A sulfonated aromatic polymer comprising the repeating structural unit of the formula I&#x2014;O&#x2014;Ar(SOR)&#x2014;C(CF)&#x2014;Ar(SOR)&#x2014;O&#x2014;Ar&#x2014;(X&#x2014;Ar)&#x2014;, &#x2003;&#x2003;(I)in which Arand Arare, independently of one another, divalent aromatic or heteroaromatic radicals which are optionally substituted by one or more monovalent organic groups which are inert under the conditions of use, R is hydrogen, an alkali metal or alkaline earth metal ion or an ammonium ion, n is an integer from 0 to 3, m is 0, 1 or 2 and X is a &#x2014;CO&#x2014;, &#x2014;O&#x2014;, &#x2014;CH&#x2014;, &#x2014;CF&#x2014; or &#x2014;S&#x2014; group, in which p is an integer from 1 to 10, is described. Membranes with high proton conductivities can be produced from this polymer and are preferably used in fuel cells.

Sulfonated aromatic polymers, membrane containing said polymers and a method for production and use of the same

Membranes comprising sulfonated polyether ketone and another polymer, process for their production, and their use, Membranes comprising from 30 to 99.5% by weight of a sulfonated, strictly alternating polyether ketone (A) having repeat units of the formula (I) &#x2014;Ar&#x2014;O&#x2014;Ar'&#x2014;CO&#x2014;, where Ar and Ar&#x2032;, independently of one another, are bivalent aromatic radicals, with an ion exchange capacity of from 1.3 to 4.0 meq of &#x2014;SOH/g of polymer and from 0.5 to 70% by weight of a partially fluorinated, nonfluorinated or perfluorinated polymer (B) are described. The membranes may be used in fuel cells.

Membranes containing sulfonated polyetherketone and another polymer, method for the production and use thereof

Method for producing sulfonated aromatic polymers and use of the process products for producing membranes

Polymer composition, membrane containing said composition, method for the production and uses thereof

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

Method for producing a membrane used to operate fuel cells and electrolyzers

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

Proton conductors comprising from 1 to 99% by weight of an acid and from 99 to 1% by weight of a nonaqueous amphoteric material which are thermally stable from &minus;50&deg; C. to 400&deg; C. and have a proton conductivity of &gE;10,S/cm. The invention further relates to membranes comprising the proton conductors of the invention, processes for preparing the membranes and their use in electrochromic cells, secondary batteries and electrochromic displays.

Proton conductors which are thermally stable over a wide range and have good proton conductivities

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

The invention relates to a semiconducting polymer and a method of preparing a semiconducting polymer. The polymer in accordance with the invention has the repeating unit (--A--NH--B--S--), wherein A and B are conjugated groups. The polymer proves to be readily soluble already in customary organic solvents, without the groups A and B having been provided with saturated substituents, and, after doping, has an electric conductivity of approximately 1 S/cm. The method yields semiconducting polymers in accordance with the invention, which have a high molecular weight and few topological defects.

Semiconductor polymer

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Schelklingen, Germany

Thomas Soczka-Guth