A humidifier with an integrated water separator for a fuel cell system, including a housing with a first channel for a first gas stream and a second channel for a second gas stream, a humidifier area in which the first channel and the second channel are separated from one another by a water vapor-permeable membrane, and a collection container for collecting the deposited liquid water is provided. It is provided that a water separator for separating liquid water is situated in the humidifier area.

The present invention relates to a wick based technique for internal humidification in a low temperature proton exchange membrane fuel cell (LT-PEMFC) which comprises electrically conducting and hydrophilic wicking material (20) such as carbon cloth or metal foam placed over the entire active area of either one or both of the anode and cathode with the bottom portion of the wick (20) dipped in a trough (14) in order to facilitate capillary action for internal humidification, a trough (14) for water transport up the wicking material (20), dry feed and ambient (28-30 C.) temperature gas supply to either anode or cathode or both electrodes, counter and co-flow operation.

An electrochemical battery including: a battery module comprising at least one electrochemical cell; an air supplier configured to supply air to the battery module and constantly maintain an oxygen concentration in the air that is supplied to the battery module; and an air recirculator configured to recirculate air exhausted from the battery module, wherein the battery module comprises an air inlet port though which air is introduced from the air supplier, and an air outlet port through which air remaining after a reaction in the at least one electrochemical cell is exhausted, and wherein the air recirculator is configured to recirculate the air exhausted through the air outlet port of the battery module to the air inlet port of the battery module.

A fuel cell system includes a bipolar plate having a flow field formed therein. The flow field is partially defined by at least two adjacent channel portions separated by a wall portion. The wall portion includes a surface at least partially defining a passageway between the channel portions. The passageway may be sized so as to create a pressure difference between the channel portions. The pressure difference may draw at least a portion of a liquid droplet obstructing one of the channel portions toward and into the passageway.

The invention relates to a method for operating a fuel cell system, in particular a PEM fuel cell system, in which an anode gas is supplied to an anode (1) of a fuel cell via a supply path (2), and is fed back via a recirculation path (3) connected to the anode (1), wherein hydrogen is used as the anode gas. According to the invention, during the start up of the fuel cell system, the anode gas is supplied to a drying device (4), in particular an adsorber, via at least one normally open valve (8, 9, 10), and water is extracted from the anode gas using the drying device (4). The invention also relates to a fuel cell system, in particular a PEM fuel cell system, which is suitable for carrying out the method.

A fuel cell including a catalyst layer configured to generate liquid water in response to a reactant being in contact therewith. The fuel cell includes a microporous layer having a first region with a first pore size and a second region disposed adjacent to the first region having a second pore size. The first pore size being greater than the second pore size. The microporous layer being configured to transfer the liquid water away from the catalyst layer, such that the liquid water from the catalyst layer enters the first region in response to a capillary pressure of the liquid water being greater than a first capillary pressure. The liquid water enters the second region in response to a capillary pressure of the liquid water being greater than a second capillary pressure. The first capillary pressure being different from the second capillary pressure.

A metal-air battery includes a battery module configured to provide electricity by oxidation of a metal and reduction of oxygen in air; and a first air purifier in fluid communication with the battery module and including a condenser configured to condense moisture in the air and remove the condensed moisture.

A electrochemical battery including: a battery module including one or more metal air cells which use oxygen gas as a positive electrode active material; an air supply configured to supply air to the battery module and to adjust an oxygen concentration in air supplied to the battery module; and a control unit configured to control an oxygen concentration adjusting operation of the air supply unit. Also a method of operating the electrochemical battery including: supplying air to a battery module using an air supply unit, the battery module including one or more metal air cells which use oxygen in air as a positive electrode active material; and controlling the air supply unit to adjust an oxygen concentration in the air supplied to the battery module.

An embodiment of the present disclosure relates to an energy generation system including a first energy generation part configured to generate electrical energy on the basis of an electrochemical reaction of a target fluid, and a second energy generation part configured to operate by receiving water discharged from the first energy generation part and generate electrical energy on the basis of a potential difference made by a movement and evaporation of the water, thereby obtaining an advantageous effect of improving energy generation efficiency.

A fuel cell system includes a molten carbonate fuel cell module including an anode section configured to output an anode exhaust stream including carbon dioxide and hydrogen and a cathode section configured to receive a cathode input stream. The fuel cell system further includes a drying system configured to receive and remove water from the anode exhaust stream and to output a dried anode exhaust stream comprising less than 0.1 percent water and a carbon dioxide solvent extraction system configured to receive the dried anode exhaust stream, expose the dried anode exhaust stream to a physical solvent to absorb carbon dioxide, output a carbon dioxide product stream comprising at least 99 percent carbon dioxide, and output a sweet gas stream.