A fuel cell system includes a fuel cell and a fuel system. The fuel cell includes a housing and a fuel cell stack positioned in the housing. The fuel cell stack is configured to produce an electrochemical reaction from a fuel and air to output electricity. The fuel system includes a fuel source, a fuel vaporizer, and fuel lines through which fuel flows from the fuel source to the fuel vaporizer and from the fuel vaporizer to the fuel cell stack. The fuel vaporizer includes a conductive tube through which the fuel flows, the conductive tube being in contact with the housing to conduct heat from the housing to the fuel to vaporize the fuel.

An electrolyte sheet for solid oxide fuel cells includes a ceramic plate body having rounded corners in a plan view from a thickness direction of the ceramic plate body, the ceramic plate body having a thickness of 200 μm or less, and each of the rounded corners having a ratio Dmax/Dmin of 1.0 to 1.1, wherein Dmax and Dmin respectively represent maximum and minimum values between distances D from an intersection of extension lines of two sides of the ceramic plate body adjacent to a respective corner to starting points of the respective extension lines in the plan view.

A heat insulation structure for a high-temperature reaction room includes a heat insulating body surrounding the reaction room. The heat insulating body contains a binder component including a metal element and is arranged so as to face an insulating film disposed on a cell stack. Transfer of metal ions originating in the metal element from the heat insulating body toward the insulating film is suppressed by a metal ion transfer suppression means.

A heat insulation structure for a high-temperature reaction room includes a heat insulating body surrounding the reaction room. The heat insulating body contains a binder component including a metal element and is arranged so as to face an insulating film disposed on a cell stack. Transfer of metal ions originating in the metal element from the heat insulating body toward the insulating film is suppressed by a metal ion transfer suppression means.

A solid oxide fuel cell assembly (SOFC) and a method for making the SOFC are provided. An exemplary method includes forming a functionalized zeolite templated carbon (ZTC). The functionalized ZTC is formed by forming a CaX zeolite, depositing carbon in the CaX zeolite using a chemical vapor deposition (CVD) process to form a carbon/zeolite composite, treating the carbon/zeolite composite with a solution comprising hydrofluoric acid to form a ZTC, and treating the ZTC to add catalyst sites. The functionalized ZTC is incorporated into electrodes by forming a mixture of the functionalized ZTC with a calcined solid oxide electrolyte and calcining the mixture. The method includes forming an electrode assembly, forming the SOFC assembly, and coupling the SOFC assembly to a cooling system.

A solid oxide fuel cell assembly (SOFC) and a method for making the SOFC are provided. An exemplary method includes forming a functionalized zeolite templated carbon (ZTC). The functionalized ZTC is formed by forming a CaX zeolite, depositing carbon in the CaX zeolite using a chemical vapor deposition (CVD) process to form a carbon/zeolite composite, treating the carbon/zeolite composite with a solution comprising hydrofluoric acid to form a ZTC, and treating the ZTC to add catalyst sites. The functionalized ZTC is incorporated into electrodes by forming a mixture of the functionalized ZTC with a calcined solid oxide electrolyte and calcining the mixture. The method includes forming an electrode assembly, forming the SOFC assembly, and coupling the SOFC assembly to a cooling system.

A fuel cell system includes at least one of plural electrochemical pump separators to separate carbon dioxide from a fuel exhaust stream or a combination of a gas separator and a fuel exhaust cooler located outside a hotbox.

Disclosed is a solid oxide fuel cell power generation system including: a fuel cell module; a blower for supplying a gaseous fuel to the fuel cell module; an air supplier for supplying air to the fuel cell module; and a fuel supplier for supplying the gaseous fuel to the blower. The blower recycles at least a portion of an unreacted gaseous fuel to the fuel cell module.

Disclosed is a solid oxide fuel cell power generation system including: a fuel cell module; a blower for supplying a gaseous fuel to the fuel cell module; an air supplier for supplying air to the fuel cell module; and a fuel supplier for supplying the gaseous fuel to the blower. The blower recycles at least a portion of an unreacted gaseous fuel to the fuel cell module.

An electrochemical cell includes a first electrolyte layer containing an oxide-ion conductor, a second electrolyte layer containing a proton conductor, a first electrode which is disposed between the first electrolyte layer and the second electrolyte layer and in contact with a first principal surface of the first electrolyte layer and a first principal surface of the second electrolyte layer and into which a gas flows, a second electrode which is provided on a second principal surface of the first electrolyte layer and which generates oxygen, and a third electrode which is provided on a second principal surface of the second electrolyte layer and which generates hydrogen.