Robert Boschgmbh

Sebastian Maass

Florian Wahl

Uwe Limbeck

Timm Lohmann

Stefan Schoenbauer

Markus Ketterer

Jan Hendrik Ohs

Jens Intorp

Frank Baumann

Gunter Wiedemann

Wolfgang Friede

Arthur Schaefert

Ralf Liedtke

The invention relates to a method () for starting up a fuel cell (), wherein hydrogen is introduced into an anode chamber () of the fuel cell (), and at the beginning of the start-up process oxygen is present in the anode chamber () of the fuel cell (). According to the invention, at the beginning of the hydrogen introduction stage enough hydrogen is introduced to ensure that upon entry into the anode chamber () hydrogen and oxygen are present in no more than a stoichiometric ratio.

Method for starting up a fuel cell

An electrode, in particular a gas diffusion electrode, for a metal-oxygen battery. To achieve an improved performance output, e.g., an improved energy density or an improved capacity, the electrode includes a porous carrier substrate on which a porous active material is situated, the electrode having a gradient of medium pore sizes between the carrier substrate and the active material. Also described is an energy store including the electrode as described.

Electrode and energy store including an electrode

A method for sealing a coolant chamber () of a bipolar plate () of a fuel cell (), the fuel cell () having at least one membrane-electrode unit () and the bipolar plate () having a first bipolar plate half () and a second bipolar plate half (), at least one of the bipolar plate halves () having a coolant distributing structure () and the coolant chamber () that is formed at least by the coolant distributing structure () being formed between the bipolar plate halves ().

Fuel cell and method for sealing a coolant chamber of a bipolar plate of a fuel cell

An energy storage and power generation system () with at least one fuel cell (), in which an oxidant and a fuel which can be stored can be converted electrochemically and in the process an electrical current can be generated, and with at least one electrolysis cell (), which is used for generating the fuel which can be stored for the fuel cell (), wherein the fuel cell () and the electrolysis cell () share a common electrode (), and the fuel cell () and the electrolysis cell () each use a respective further electrode () only for themselves. For this purpose, the invention provides that the fuel can be stored outside the fuel cell () and outside the electrolysis cell () in a store ().

Energy storage and power generation system

The subject of the present invention is a fuel cell system having at least one fuel cell which has an anode, a cathode, and a membrane element. Two electrode chambers are disposed in the fuel cell, and the electrode chambers are an anode chamber and a cathode chamber. An educt flows into the anode chamber and into the cathode chamber by means of a respective incoming stream. According to the invention, it is provided that at least one compensation region is disposed on the end of the membrane element and serves solely to moisten and/or temper at least one of the incoming streams.

Fuel cell system with a compensation region for moistening and/or tempering

The subject of the present invention relates to a method and a protector for reducing degradation of fuel cell systems at transitions in operation, in particular at electrodes or catalysts in a combustion chamber of a stack of a PEM fuel cell system in startup and shutoff events of the fuel cell system. A switchable material delivery device is provided for varying a delivery of material to the fuel cell system, so that a transition from a first state of the fuel cell system to a second state of the fuel cell system can be initiated, such that a potential difference between different electrodes can be effected. At least one reducing mechanism is provided for reducing the potential difference between the different electrodes during the transition, in which the reducing mechanism includes at least one compensating device for an unequal gas distribution by reducing the proportions causing degradation, to reduce degradation. The compensation device includes at least one short-circuiting unit, with which the different electrodes can be short-circuited, in order to reduce the potential difference.

Growing community of inventors

Renningen-Malmsheim, Germany

Sebastian Maass