Patent ID: 7285347
Filing Date: 2007-10-23
Classification: C04B,H01M,Y02E,Y02P

Abstract:
1. A method of fabricating an anode-supported flat-tubular solid oxide fuel cell stack, comprising: extruding and drying a paste, containing NiO-yttria-stabilized-zirconia (YSZ) powder; pre-sintering the resulting paste at 1250 to 1400° C. to produce a supported tube; coating a band-shaped organic layer along a length of a center of an upper plate of the supported tube, coating an electrolyte slurry on an external surface of the supported tube through a wet dipping process, and drying the electrolyte slurry; removing the band-shaped organic layer from the supported tube and repeatedly degreasing the electrolyte slurry at 200 to 450°C.; co-sintering the resulting supported tube at 1300 to 1500° C.; coating perovskite powder in which Ca, Sr, Mg, Co, or Al is added to LaCrO coating another organic layer on the ceramic connector, preparing a mixed powder of LaSrMnO mixing 10 to 30 wt % of LaSrMnO sequentially coating slurry containing the LaSrMnO removing the organic layer from the ceramic connector; sintering the air electrode slurries at 1150 to 1250° C. to accomplish a unit fuel cell; forming a plurality of grooves, gas channels, and connector protrusions on metal plates made of a metal selected from the group consisting of a Fe—Cr based alloy, a Fe—Cr alloy containing LaCrO polishing surfaces of the metal plates; producing slurry for a connector plate containing LaSrMnO dipping the metal plates into the slurry for the connector plate and repeatedly drying the metal plates one time or more to coat the slurry for the connector plate on the metal plates; sintering the resulting metal plates at 1100 to 1350° C. under oxygen partial pressure of 10 stacking the connector plate and fuel cells to fabricate the anode-supported flat-tubular solid oxide fuel cell stack and connecting stack electrodes to the anode-supported flat-tubular solid oxide fuel cell stack.