Patent ID: 7790221

Claim:
A method of fabricating an electrochemical oxygen generator comprising the steps of: a) providing a porous gas permeable cylindrical tube comprising an open end, a closed end, an interior surface and an exterior surface, b) coating said exterior surface with a first gas permeable conductive metal electrode layer, c) coating said first conductive metal electrode layer with a gas permeable lanthanum strontium manganate anode layer by means of a sol-gel process comprising applying layers of a gel solution formed from aqueous solutions of water-soluble strontium, manganese and lanthanum salts and heating each layer after it is applied to a temperature between about 1000 and about 1200° C., d) coating a solid gas impermeable electrolyte gel layer comprising yttria stabilized cubic zirconia onto the anode layer by means of a sol gel process comprising applying layers of a gel solution formed from aqueous solutions of water-soluble yttrium and zirconium salts, heating each layer after it is applied to a temperature and for a duration of time effective to form cubic phase ZrO 2 , and heating the overall layers to 1200° C. for 60 minutes, wherein said yttrium salt is present in an amount effective to stabilize said cubic phase in said solid electrolyte layer, e) coating a gas permeable of lanthanum strontium manganate cathode layer onto the solid electrolyte layer by means of a sol-gel process comprising applying layers of a gel solution formed from aqueous solutions of water-soluble strontium, manganese and lanthanum salts and heating each layer after it is applied to a temperature between about 600 and about 1000° C., and f) coating a second gas permeable conductive metal electrode layer onto said cathode layer.