Disclosed is a method of operating an Alkaline Membrane Fuel Cell (AMFC) with direct ammonia feeding. The method may include providing AMFC comprising an anode inlet for receiving ammonia and a cathode inlet for receiving oxygen containing gas; operating the AMFC at an operation temperature of above 80° C.; providing the oxygen containing gas; to a cathode of the AMFC at a pressure above the equilibrium vapor pressure of water at the operation temperature; maintaining the pressure during the operation of the AMFC as to maintain water in substantially liquid phase near the cathode; and providing the ammonia to an anode of the AMFC.

An anion exchange polymer includes aryl ether linkage free polyarylenes having aromatic/polyaromatic rings in polymer backbone and a tethered alkyl quaternary ammonium hydroxide side groups. This anion exchange polymer may be utilized in an anion exchange process and may be made into a thin anion transfer membrane. An ion transfer membrane may be mechanically reinforced having one or more layers of functional polymer based on a terphenyl backbone with quaternary ammonium functional groups and an inert porous scaffold material for reinforcement. An anion exchange membrane may have multilayers of anion exchange polymers which each containing varying types of backbones, varying degrees of functionalization, or varying functional groups to reduce ammonia crossover through the membrane.

An electrochemical cell has a first volume exposed to respective surfaces of an anode and a cathode, the electrochemical cell also being provided with a steam inlet to allow steam into the first volume.

Turbomachine (10), in particular for a fuel cell system (1). The turbomachine (10) comprises a compressor (11), a drive device (20) and a shaft (14). The compressor (11) has a rotor (15) arranged on the shaft (14), a compressor inlet (11a) and a compressor outlet (11b). A working fluid can be delivered from the compressor inlet (11a) to the compressor outlet (11b). A drive cooling path (92) for cooling the drive device (20) branches off at the compressor outlet (11b). Also proposed is a fuel cell system (1) with a turbomachine (10) according to the invention, a method for operating the turbomachine (10) and a method for operating the fuel cell system (1).

A controller of a fuel cell system performs cathode gas supply control to raise an average cell voltage of a fuel cell stack by increasing supply of cathode gas to the fuel cell stack, when electric power required to be generated by the fuel cell stack is equal to zero, and the average cell voltage is lower than a predetermined target voltage. Under the cathode gas supply control, the controller sets the target voltage when a predetermined condition indicating that crossleak is likely to occur is satisfied, to a value higher than a reference target voltage as the target voltage in the case where the condition is not satisfied.

Disclosed is a method of operating an Alkaline Membrane Fuel Cell (AMFC) with direct ammonia feeding. The method may include providing AMFC comprising an anode inlet for receiving ammonia and a cathode inlet for receiving oxygen containing gas; operating the AMFC at an operation temperature of above 80° C.; providing the oxygen containing gas; to a cathode of the AMFC at a pressure above the equilibrium vapor pressure of water at the operation temperature; maintaining the pressure during the operation of the AMFC as to maintain water in substantially liquid phase near the cathode; and providing the ammonia to an anode of the AMFC.

Various designs and configurations of and methods of operating fuel cell units, fuel cell systems and combined heat and power systems are provided that permit efficient thermal management of such units and systems to improve their operation.

Provided is a transportation device which is capable of continuously travelling without being supplied with hydrogen from the outside. According to the present invention, a transportation device is provided with an ammonia storage means, a hydrogen production device, a fuel cell, a motor, a battery and a control unit. The hydrogen production device produces hydrogen by decomposing ammonia; and the fuel cell is supplied with hydrogen from the hydrogen production device and generates electric power. The motor operates by being supplied with some or all of the electric power generated by the fuel cell. The battery is supplied with some or all of the electric power generated by the fuel cell, and supplies electric power to the motor and the hydrogen production device.

The present disclosure relates to a hydrogen filling system that includes a receptacle that is provided in a fuel cell electric vehicle and to which a fueling nozzle that dispenses hydrogen is connected, a manifold connected with a hydrogen tank provided in the fuel cell electric vehicle, a hydrogen filling line that connects the receptacle and the manifold, a hydrogen supply line that connects a fuel cell stack provided in the fuel cell electric vehicle and the manifold, and a buffer line that is connected to the hydrogen supply line and that heats the receptacle using heat of compression by the hydrogen that is supplied into the hydrogen supply line during filling of the hydrogen tank with the hydrogen. The present disclosure may obtain advantageous effects of suppressing freezing of the receptacle and improving safety and reliability.

Presented are fuel cell systems and control logic for extracting water from system exhaust, methods for making/using such systems, and electric-drive vehicles with aftertreatment systems for extracting water from fuel cell exhaust. An aftertreatment system for a fuel cell stack includes a condensate generator that fluidly connects to the fuel cell stack to receive exhaust output therefrom. The condensate generator includes an evaporator core with a refrigerant line that actively cool the exhaust via controlled circulation of refrigerant fluid. A condensate collector fluidly connected to the condensate generator includes a reservoir housing with a condensate trap that separates entrained water vapor from the cooled exhaust. The reservoir housing collects the separated water vapor as liquid water. A liquid storage container fluidly connected to the condensate collector receives and stores the collected water. An expansion valve regulates the amount of refrigerant fluid passed into the evaporator core through the refrigerant line.