# US 9,520,597 B2 · Cathode material, interconnector material and solid oxide fuel cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,520,597 B2 - Document ID: US9520597B2 - Status: Granted - Kind: B2 - Application number: 13/616,905 - Filed: 2012-09-14 - Published: 2013-09-19 - Granted: 2016-12-13 - Earliest claimed: 2011-12-19 - Assignees: NGK Insulators, Ltd. - Applicants: Makoto Ohmori; Ayano Kobayashi; Shinji Fujisaki - Inventors: Makoto Ohmori; Ayano Kobayashi; Shinji Fujisaki - Web page: https://patentgrep.com/patent/US9520597B2 ## CPC - H01M 4/8663: {Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers} - B01J 23/002: {Mixed oxides other than spinels, e.g. perovskite} - B01J 23/83: with rare earths or actinides - B01J 35/33: Electric or magnetic properties - C04B 35/01: based on oxide ceramics - C04B 35/26: based on ferrites - H01M 4/9033: {Complex oxides, optionally doped, of the type M1MeO3, M1 being an alkaline earth metal or a rare earth, Me being a metal, e.g. perovskites} - H01M 8/0217: Complex oxides, optionally doped, of the type AMO3, A being an alkaline earth metal or rare earth metal and M being a metal, e.g. perovskites - B01J 27/188: with chromium, molybdenum, tungsten or polonium - B01J 2523/00: Constitutive chemical elements of heterogeneous catalysts - C04B 2235/3213: Strontium oxides or oxide-forming salts thereof - C04B 2235/3227: Lanthanum oxide or oxide-forming salts thereof - C04B 2235/3275: Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite - C04B 2235/3279: Nickel oxides, nickalates, or oxide-forming salts thereof - C04B 2235/5436: micrometer sized, i.e. from 1 to 100 micron - C04B 2235/5445: submicron sized, i.e. from 0,1 to 1 micron - C04B 2235/72: Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics - C04B 2235/725: Metal content - C04B 2235/727: Phosphorus or phosphorus compound content - C04B 2235/768: Perovskite structure ABO3 - H01M 8/0202: Collectors; Separators, e.g. bipolar separators; Interconnectors - H01M 2008/1293: {Fuel cells with solid oxide electrolytes} - Y02E 60/50: Fuel cells - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A cathode material for a solid oxide fuel cell comprises a complex oxide having a perovskite structure expressed by the general formula ABO3, a content amount of P included in the complex oxide being at least 1 ppm and no more than 50 ppm, a content amount of Cr in the complex oxide being at least 1 ppm and no more than 500 ppm, and a content amount of B in the complex oxide being at least 1 ppm and no more than 50 ppm in a weight ratio relative to a total weight of the complex oxide. ## Claims ### Claim 1 A cathode material for a solid oxide fuel cell, comprising: a complex oxide having a perovskite structure expressed by the general formula ABO3, where A is at least one of lanthanum and strontium, and where B is at least one of cobalt, iron and nickel, a content amount of phosphorus included in the complex oxide being at least 10 ppm and no more than 50 ppm, a content amount of chromium in the complex oxide being at least 50 ppm and no more than 500 ppm, and a content amount of boron in the complex oxide being at least 5 ppm and no more than 50 ppm in a weight ratio relative to a total weight of the complex oxide, the cathode material having a uniform composition distribution throughout the cathode material including an outer surface and an inner body of the cathode material. ### Claim 2 (depends on 1) The cathode material for a solid oxide fuel cell according to claim 1, wherein the content amount of phosphorus included in the complex oxide is no more than 30 ppm in the weight ratio relative to the total weight of the complex oxide. ### Claim 3 (depends on 1) The cathode material for a solid oxide fuel cell according to claim 1, wherein the content amount of chromium included in the complex oxide is no more than 100 ppm in the weight ratio relative to the total weight of the complex oxide. ### Claim 4 (depends on 1) The cathode material for a solid oxide fuel cell according to claim 1, wherein the content amount of boron included in the complex oxide is more preferably no more than 10 ppm in the weight ratio relative to the total weight of the complex oxide. ### Claim 5 (depends on 2) The cathode material for a solid oxide fuel cell according to claim 2, wherein the content amount of chromium included in the complex oxide is no more than 100 ppm in the weight ratio relative to the total weight of the complex oxide. ### Claim 6 (depends on 2) The cathode material for a solid oxide fuel cell according to claim 2, wherein the content amount of boron included in the complex oxide is more preferably no more than 10 ppm in the weight ratio relative to the total weight of the complex oxide. ### Claim 7 (depends on 3) The cathode material for a solid oxide fuel cell according to claim 3, wherein the content amount of boron included in the complex oxide is more preferably no more than 10 ppm in the weight ratio relative to the total weight of the complex oxide. ### Claim 8 (depends on 1) A solid oxide fuel cell comprising the cathode made of the cathode material according to claim 1, the solid oxide fuel cell further comprising: an anode; and a solid electrolyte layer disposed between the cathode and the anode. ### Claim 9 (depends on 2) A solid oxide fuel cell comprising the cathode made of the cathode material according to claim 2, the solid oxide fuel cell further comprising: an anode; and a solid electrolyte layer disposed between the cathode and the anode. ### Claim 10 (depends on 3) A solid oxide fuel cell comprising the cathode made of the cathode material according to claim 3, the solid oxide fuel cell further comprising: an anode; and a solid electrolyte layer disposed between the cathode and the anode. ### Claim 11 (depends on 4) A solid oxide fuel cell comprising the cathode made of the cathode material according to claim 4, the solid oxide fuel cell further comprising: an anode; and a solid electrolyte layer disposed between the cathode and the anode. ### Claim 12 A cathode material for a solid oxide fuel cell, comprising: a complex oxide having a perovskite structure expressed by the general formula ABO3, where A is at least one of lanthanum and strontium, and where B is at least one of cobalt, iron and nickel, a content amount of phosphorus included in the complex oxide being at least 10 ppm and no more than 50 ppm, a content amount of chromium in the complex oxide being at least 20 ppm and no more than 500 ppm, and a content amount of boron in the complex oxide being at least 3 ppm and no more than 50 ppm in a weight ratio relative to a total weight of the complex oxide, the cathode material having a uniform composition distribution throughout the cathode material including an outer surface and an inner body of the cathode material. ### Claim 13 (depends on 12) The cathode material for a solid oxide fuel cell according to claim 12, wherein the content amount of phosphorus included in the complex oxide is no more than 30 ppm in the weight ratio relative to the total weight of the complex oxide. ### Claim 14 (depends on 12) The cathode material for a solid oxide fuel cell according to claim 12, wherein the content amount of chromium included in the complex oxide is no more than 100 ppm in the weight ratio relative to the total weight of the complex oxide. ### Claim 15 (depends on 12) The cathode material for a solid oxide fuel cell according to claim 12, wherein the content amount of boron included in the complex oxide is more preferably no more than 10 ppm in the weight ratio relative to the total weight of the complex oxide. ### Claim 16 (depends on 12) A solid oxide fuel cell comprising the cathode made of the cathode material according to claim 12, the solid oxide fuel cell further comprising: an anode; and a solid electrolyte layer disposed between the cathode and the anode.