The present invention is a method for producing electricity comprising a fuel cell which makes it possible to valorize the heat given off by the cell to generate fuel for said fuel cell by a process of thermal dissociation, applied to the product of the same chemical composition than that produced by the cell, at least part of the heat given off by the cell being supplied to at least one of the endothermic reactions of said dissociation process.

The present invention relates to rhomboidal phase bismuth oxide that maintains electric conductivity of at least about 1×10.sup.−2 S/cm at temperature of about 500° C. for at least about 100 hours. In particular, the bismuth oxides of the invention have stable conductivity at a temperature range from about 500° C. to about 550° C.

The present invention relates to rhomboidal phase bismuth oxide that maintains electric conductivity of at least about 1×10.sup.−2 S/cm at temperature of about 500° C. for at least about 100 hours. In particular, the bismuth oxides of the invention have stable conductivity at a temperature range from about 500° C. to about 550° C.

Disclosed herein are electrolyte bismuth calcium ferrites having high oxygen vacancy ion mobility. There can be provided an oxygen vacancy electrolyte material including bismuth calcium ferrites (Bi.sub.1-xCa.sub.xFeO.sub.3-δ).

Provided is room temperature stable δ-phase Bi.sub.2O.sub.3. Ion conductive compositions comprise at least 95 wt % δ-phase Bi.sub.2O.sub.3, and, at 25° C., the compositions are stable and have a conductivity of at least 10.sup.−7 S/cm. Related methods, electrochemical cells, and devices are also disclosed.

The present disclosure belongs to the technical field of solid oxide fuel cell stacks, and particularly relates to a method for preparing a connector-free anode-supported solid oxide fuel cell stack by means of 3D printing. The method includes taking a mixed paste of an anode ceramic powder and a photosensitive resin as a raw material, and preparing a three-dimensional channel honeycomb-type anode-supported matrix by means of 3D printing; and obtaining an anode-supported solid oxide fuel cell by means of an impregnation method, effectively bringing same into contact, and abutting and sealing same in the order of a cathode, an anode and a cathode, and forming the connector-free anode-supported solid oxide fuel cell stack after performing connection in series.

Provided is room temperature stable -phase Bi.sub.2O.sub.3. Ion conductive compositions comprise at least 95 wt % -phase Bi.sub.2O.sub.3, and, at 25 C., the compositions are stable and have a conductivity of at least 10.sup.7 S/cm. Related methods, electrochemical cells, and devices are also disclosed.

Disclosed herein are electrolyte bismuth calcium ferrites having high oxygen vacancy ion mobility. There can be provided an oxygen vacancy electrolyte material including bismuth calcium ferrites (Bi.sub.1-xCa.sub.xFeO.sub.3-).

The present specification relates to a solid oxide fuel cell and a method for manufacturing the same.

The present invention relates to rhomboidal phase bismuth oxide that maintains electric conductivity of at least about 110.sup.2 S/cm at temperature of about 500 C. for at least about 100 hours. In particular, the bismuth oxides of the invention have stable conductivity at a temperature range from about 500 C. to about 550 C.