Abstract: The present invention relates to a composite of a cobalt-based perovskite material with a negative thermal expansion material, and a preparation method of the same, and a solid oxide fuel cell (SOFC) comprising the same, and belongs to the technical field of fuel cells. In the present invention, a negative thermal expansion material is introduced into a cobalt-based perovskite oxide to successfully prepare an SOFC cathode material with excellent electrochemical performance and low thermal expansivity. The composite electrode achieves prominent mechanical tolerance in SOFC, which can moderate a volume change during the whole calcination process and enable a smooth transition to a high-temperature stage. The composite electrode has a thermal expansion coefficient (TEC) only of 12.9×10?6 K?1, which is perfectly matched with that of an SDC electrolyte. In addition, the composite shows excellent oxygen reduction reaction (ORR) activity, high TEC, and extremely-excellent anti-CO2 poisoning performance.

Abstract: The present invention relates to a medium and high-temperature carbon-air cell, which include a solid oxide fuel cell, a CO2 separation membrane and a carbon fuel. The solid oxide fuel cell is a tubular solid oxide fuel cell with one end closed, the carbon fuel is placed inside the tubular solid oxide fuel cell, and the CO2 separation membrane is sealed at the open end of the solid oxide fuel cell. In the carbon-air cell, with carbon as fuel and oxygen in the air as an oxidizing gas, electrochemical reactions occur. The carbon-air cell of the present invention has a novel structural design, and can achieve electricity generation with the solid oxide fuel cell without externally charging a gas, and at the same time, CO2 generated inside the solid oxide fuel cell can be discharged from the system through the CO2 separation membrane in time.

Abstract: The present invention relates to a medium and high-temperature carbon-air cell, which include a solid oxide fuel cell, a CO2 separation membrane and a carbon fuel. The solid oxide fuel cell is a tubular solid oxide fuel cell with one end closed, the carbon fuel is placed inside the tubular solid oxide fuel cell, and the CO2 separation membrane is sealed at the open end of the solid oxide fuel cell. In the carbon-air cell, with carbon as fuel and oxygen in the air as an oxidizing gas, electrochemical reactions occur. The carbon-air cell of the present invention has a novel structural design, and can achieve electricity generation with the solid oxide fuel cell without externally charging a gas, and at the same time, CO2 generated inside the solid oxide fuel cell can be discharged from the system through the CO2 separation membrane in time.

Abstract: Improved cathode active materials for reduced temperature operation in single and dual chamber solid oxide fuel cells are provided. The cathode active materials comprise perovskites of the general form ABO3, where A is a cation with approximately a +2 charge, and B is a cation with approximately a +4 charge. These perovskite cathode materials exhibit substantially enhanced power generation at operation temperatures less than or equal to 600° C.

Abstract: A positive electrode composite for a solid oxide fuel cell, on the positive electrode composite including: a porous reaction prevention layer; and a mixed-conductivity material disposed in the porous reaction prevention layer.

Abstract: A cathode material for a fuel cell, the cathode material including a first metal oxide having a perovskite structure; and a second metal oxide having a spinel structure.

Abstract: Improved cathode active materials for reduced temperature operation in single and dual chamber solid oxide fuel cells are provided. The cathode active materials comprise perovskites of the general form ABO3, where A is a cation with approximately a +2 charge, and B is a cation with approximately a +4 charge. These perovskite cathode materials exhibit substantially enhanced power generation at operation temperatures less than or equal to 600° C.

Abstract: Improved cathode active materials for reduced temperature operation in single and dual chamber solid oxide fuel cells are provided. The cathode active materials comprise perovskites of the general form ABO3, where A is a cation with approximately a +2 charge, and B is a cation with approximately a +4 charge. These perovskite cathode materials exhibit substantially enhanced power generation at operation temperatures less than or equal to 600° C.

Abstract: The present invention relates to a power generator and method for forming the same. More specifically, the present invention comprises a chamber containing a solid oxide fuel cell (SOFC), with a spiral-wound counter-current heat exchanger encompassing the chamber. The spiral-wound counter-current heat exchanger includes a first inlet and an outlet, where both the first inlet and the outlet are connected with the chamber such that reactants introduced into the power generator flow into the first inlet and past the SOFC, where the reactants react to produce energy and reaction products. The reaction products thereafter transfer heat to the reactants and subsequently exit through the outlet. A reactor can be positioned downstream of the SOFC for converting reactants not reacted by the SOFC.

Abstract: The present invention relates to a power generator and method for forming the same. More specifically, the present invention comprises a chamber containing a solid oxide fuel cell (SOFC), with a spiral-wound counter-current heat exchanger encompassing the chamber. The spiral-wound counter-current heat exchanger includes a first inlet and an outlet, where both the first inlet and the outlet are connected with the chamber such that reactants introduced into the power generator flow into the first inlet and past the SOFC, where the reactants react to produce energy and reaction products. The reaction products thereafter transfer heat to the reactants and subsequently exit through the outlet. A reactor can be positioned downstream of the SOFC for converting reactants not reacted by the SOFC.

Abstract: Improved cathode active materials for reduced temperature operation in single and dual chamber solid oxide fuel cells are provided. The cathode active materials comprise perovskites of the general form ABO3, where A is a cation with approximately a +2 charge, and B is a cation with approximately a +4 charge. These perovskite cathode materials exhibit substantially enhanced power generation at operation temperatures less than or equal to 600° C.