Patent ID: 8367273
Filing Date: 2013-02-05
Classification: H01M,Y02E,Y02P

Abstract:
1. A method for preparation of a solid oxide fuel cell single cell operational from 723 to 1073 K, said fuel cell including a microporous and mesoporous cathode electrode, comprising the following steps: (A) thermal decomposing a mixture of rare earth nitrate, strontium nitrate and cobalt nitrate with conducting corresponding rare earth cobaltite activated with strontium ions in the presence of the reducing agent and oxygen; (B) preparing a raw cathode electrode paste by mixing rare earth cobaltite activated with strontium ions, mechanically uncompressible pore forming agent, organic binder and solvent or mixture of solvents as microporous and mesoporous forming agents for obtaining highly microporous and mesoporous cathode electrode; (C) preparing gadolinia or samaria doped ceria electrolyte by sintering at a temperature from about 800 to about 1800 K with the molar ratio of gadolinia or samaria in gadolinia or samaria activated ceria varied with CeO (D) forming said microporous and mesoporous cathode electrode and microporous and mesoporous cathode electrolyte halfcell by burning out the pore forming agent, solvent and binder from the raw cathode electrode paste and sintering said raw cathode electrode paste onto the gadolinia or samaria doped ceria oxide oxygen ion conducting electrolyte at a temperature from about 700 to about 1773 K for about 60 to about 600 min; and (E) screenprinting Pt-paste onto a free side of cathode electrolyte halfcell and sintering the fuel cell at temperatures from about 800 to about 1500 K for about 6 to about 600 min.