Robert Boschgmbh

U.S. Philips Corporation

Gs Yuasa International Ltd.

Harald Bauer

Gerhard Hettich

Juergen Hackenberg

Dietmar Lorenz

Wolfgang Weydanz

Leonore Glanz

Karl Hellwig

Calin Iulius Wurm

Gunther Alberter

Peter Meyer

Michael Lingner

Peter Kempf

Helerson Kemmer

Bernd Reinsch

Reinhard Helldorfer

Armin Glock

Roberto Woudsma

Volker Henrichs

Claudio Baldizzone

Christian Diessner

Erhard Hirth

Alexander Eifert

Helmut Salbaum

Rolf Keller

Herbert Gruhn

Johannes Schuck

Rainer Dietsch

Thomas Betzitza

Andreas Bening

Friedrich Fruhwald

Peter Lindner

A method for producing a bipolar plate () for a fuel cell (), including a plate body () for separating the fuel cell () from a neighboring fuel cell () or a housing. The plate body () has a flow field structure () for introducing the reactants into the fuel cell (). The method includes the following steps: providing a mass (D) made of electrically conductive particles and a polymer-based adhesive; applying the provided mass (D) to the plate body () of the bipolar plate () in the form of the flow field structure (); pyrolising the applied mass (D) which remains on the plate body () of the bipolar plate () as a shaping element in the form of the flow field structure () and which is connected to the plate body.

Method for producing a bipolar plate for a fuel cell

The invention relates to a method for producing a sealed fuel cell () for a fuel cell stack (), comprising a cathode-side distributor plate (K), an anode-side distributor plate (A) and a membrane electrode unit (MEA), said method comprising the following steps: 1) providing a cathode-side distributor plate (K) and an anode-side distributor plate (A), 2) providing a first film web (B) for sealing the cathode-side distributor plate (K) and a second film web (B) for sealing the anode-side distributor plate (A), 3) punching a cathode-side distributor structure (VK) for the cathode-side distributor plate (K) out of the first film web (B) and an anode-side distributor structure (VA) for the anode-side distributor plate (A) out of the second film web (B), 4) cutting the first film web (B) to produce a first seal (D) for the cathode-side distributor structure (VK) and cutting the second film web (B) to produce a second seal (D) for the anode-side distributor structure (VA), 5) placing the first seal (D) on the cathode-side distributor plate (K) and the second seal (D) on the anode-side distributor plate (A), 6) heating the cathode-side distributor plate (K) and the anode-side distributor plate (A) in order to connect together the first seal (D) on the cathode-side distributor plate (K) and the second seal (D) on the anode-side distributor plate (A) in an integrally joined manner, more particularly to melt said seals together.

Method for producing a sealed fuel cell

The present invention relates to a method for producing a precursor material () for an electrochemical cell. The method comprises the steps of adding a matrix material () to a fluidized bed (), and adding a carrier medium () and a de-agglomerated carbon nanotube material () to the fluidized bed (), so that the carbon nanotube material () and the carrier medium () is applied to the matrix material () and the latter is granulated therewith, wherein the carbon nanotube material () has been suspended and de-agglomerated prior to addition to the carrier medium (), and/or the carbon nanotube material () present in de-agglomerated form in the fluidized bed () dissolving with the carrier medium () in the fluidized bed ().

Method for producing a precursor material for an electrochemical cell

An electrode material () for a fuel cell (), comprising a planar body () made of an electrically conductive foam having an open and continuous porosity for at least one operating medium of the fuel cell (), wherein the planar body () has a top side () and a bottom side (), and wherein the thickness () of the material across all points (') on the surface of the top side (), measured in each case between a point (&#x2032;) on the surface of the top side () and the point (&#x2032;) opposite this point (&#x2032;) on the surface of the bottom side (), varies by at least 10%. An electrode () for a fuel cell (), comprising a planar body () made of an electrically conductive foam having an open and continuous porosity for at least one operating medium of the fuel cell (), wherein the planar body () has a top side () and a bottom side (), and wherein the top side (), and/or the bottom side (), has regions () in which the porosity of the planar body () is reduced by at least 10%. A fuel cell () comprising the electrode (). A method for production.

Electrode material and electrode for operating-medium distribution in a fuel cell

The invention relates to a method for producing an electrochemical cell comprising at least one porous electrode ('), the method comprising at least the following method steps: (a) providing an electrode composition in the form of a homogeneous mixture comprising (i) at least one particulate active material (); (ii) at least one particulate binder (); (iii) at least one particulate pore-forming agent (); and (iv) optionally at least one conducting additive (); (b) forming a mouldable mass from the electrode composition; (c) applying the electrode composition to at least one surface of a substrate () to obtain a compact electrode (); (d) producing an electrochemical cell comprising at least one compact electrode () which comprises the electrode composition according to method step (a); and (e) heating the at least one compact electrode () to liquefy the at least one particulate pore-forming agent (); and/or (f) bringing the compact electrode () into contact with at least one liquid electrolyte composition or at least one liquid constituent of an electrolyte composition for an electrochemical cell which is capable of at least partially dissolving the at least one particulate pore-forming agent () to obtain a porous electrode (), wherein method steps (a), (b), (c), (d) and (e) are carried out substantially without solvents.

Method for producing porous electrodes for electrochemical cells

A process for producing a composite material comprising at least one particulate material and at least one polymeric binder, wherein the at least one particulate material and the at least one polymeric binder are mixed with one another and mechanically processed in the presence of at least one process auxiliary which reduces the mechanical and/or chemical interaction between the surfaces of the at least one particulate material and of the at least one polymeric binder, essentially dispensing with the use of solvents, characterized in that the weight ratio of process auxiliary to polymeric binder is within a range from 3:10 to 0.1:20.

Process for producing a composite material

The invention relates to a method for producing an electrode (E) for an electrochemical cell, in particular for a lithium cell. In order to produce a homogeneous mixture allowing the time-saving, cost-effective production, for example by dry coating, of an electrode (E) with improved properties and/or with a layer thickness significantly greater than 100 &#x3bc;m, for example for vehicle batteries, in particular for electric and/or hybrid vehicles, in said method at least one binder (B) and at least one particulate fibrillation auxiliary agent (F) are mixed in a mixing process with a high shear load, the at least one binder (B) being fibrillated (fB), and at least one electrode component (E) is then added to the at least one fibrillated binder (B) in a mixing process with a low shear load. The invention also relates to an electrode (E) produced in this manner and to an electrochemical cell equipped with an electrode (E) of this type.

Electrode production method by binder fibrillation using a particulate fibrillation auxiliary agent

The invention relates to a method for producing a flow plate () for a fuel cell (), comprising a plurality of gas guide webs () and at least one electrically conductive and porous layer unit () arranged on the gas guide webs (). It is proposed that a geometry and/or a structure of the layer unit () is produced during a material application onto the gas guide webs ().

Method for producing a flow plate for a fuel cell

A method for producing an electrode having an electrically conductive current collector layer having a terminal region for connection to an electrical power circuit, in which to improve the electrical discharge via the terminal region, the current collector layer has at least one structural element having an electrical conductivity that is increased compared to the current collector layer, through which structural element the electrical resistance between a point on the current collector layer and the terminal region is reduced, the method including: providing at least one free-standing active material foil; providing an electrically conductive layer on at least one surface of the active material foil, the electrically conductive layer being formed immediately on the surface of the active material foil to form the current collector layer; and connecting an electrical terminal region to the electrically conductive layer to enable connection to an electrical power circuit.

Method for producing electrodes having an improved current collector structure

An electrode that includes at least one current collector having a flat configuration and to which at least one arrester is attached, and at least one active material foil. The at least one active material foil is situated on a first surface of the current collector, and protrudes beyond the current collector on all sides along its edges to form an overhang of the active material foil past the outer boundary of the current collector on all sides.

Electrode including an increased active material content

A method is provided for producing a homogenous particulate material composition, including at least one particulate material M, at least one additive Z, and at least one binding agent B, the method including providing at least one particulate material M, at least one additive Z, and at least one binding agent B; producing a homogenous mixture G1 from the at least one particulate material M and the at least one additive Z in a gravity mixer; producing a mixture G2 from the mixture G1 and the at least one binding agent B, with the introduction of shear forces; and removing dispersed gases from the mixture G2.

Method for producing a homogenous particulate material composition

A device for wet-chemical treatment of substrates includes: an accommodation device for a substrate and a process medium, the substrate having a treatment side in operative connection with the process medium; a fluid guidance element, having a specified surface texture, housed in the accommodation device, the specified surface texture being configured to provide a guidance of the process medium along the specified surface texture, the specified surface texture being positioned lying opposite and at a predetermined fixed recess at a distance from the treatment side of the substrate; and the process medium being moved in the intervening space between the specified surface texture of the fluid guidance element and the treatment side of the substrate.

Device for the homogeneous wet-chemical treatment of substrates

A device for simultaneous coating of a plurality of workpieces is described, the plurality of workpieces being situated in a shared flow shaft through which an electrolyte flows, and each workpiece being connected electrically conducting to at least one component electrode and being electrically insulated in relation to at least one bath electrode, and a plurality of flow channels and a flow distributor for distributing the electrolyte stream to the plurality of flow channels further being situated in the flow shaft, the at least one bath electrode being situated in one of the flow channels.

Device and method for simultaneous coating or de-coating of a plurality of workpieces and workpiece

An electrode in a battery, e.g., a lithium-ion battery, has an electrically conductive carrier foil including (i) a terminal region for connection to an electrical circuit and (ii) at least one electrically conductive structure element configured to reduce the electrical resistance between the terminal region and a point on the carrier foil in order to improve electrical collection via the terminal region.

Growing community of inventors

Nurnberg, Germany

Harald Bauer