Electrochemical cell
US-2019088968-A1 · Mar 21, 2019 · US
Air electrode material powder for solid oxide fuel cells
US11515545B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11515545-B2 |
| Application number | US-201916977939-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 14, 2019 |
| Priority date | Mar 29, 2018 |
| Publication date | Nov 29, 2022 |
| Grant date | Nov 29, 2022 |
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Abstract
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The invention provides an air electrode material powder for solid oxide fuel cells, comprising particles of a perovskite composite oxide represented by the general formula ABO3, and comprising La and Sr as the A-site elements, and Co and Fe as the B-site elements.
First claim
Opening claim text (preview).
What is claimed is: 1. An air electrode material powder for solid oxide fuel cells, comprising particles of a perovskite composite oxide represented by the formula ABO 3 , and comprising La and Sr as A-site elements, and Co and Fe as B-site elements, wherein the particles comprise coarse particles having a particle diameter of 0.2 μm or more and fine particles having a particle diameter of less than 0.2 μm, wherein the fine particles account for 60% or more of the total number of particles on a number basis, and wherein the fine particles comprise fine particles X1 each having a Sr/La atomic ratio in a surface layer thereof that is three or more times larger than a Sr/La atomic ratio in a surface layer of the coarse particle to which each of the fine particles X1 adheres, and a number of the fine particles X1 is 40% or more of the total number of the fine particles. 2. The air electrode material powder for solid oxide fuel cells according to claim 1 , wherein the fine particles having a particle diameter of less than 0.2 μm account for 60 to 80% of the total number of particles on a number basis. 3. The air electrode material powder for solid oxide fuel cells according to claim 1 , wherein the number of the fine particles X1 is in the range of 40% to 70% of the total number of the fine particles. 4. The air electrode material powder for solid oxide fuel cells according to claim 1 , wherein the fine particles X1 comprise fine particles X2 each having a Sr/La atomic ratio in a surface layer thereof that is three to six times larger than the Sr/La atomic ratio in the surface layer of the coarse particle to which each of the fine particles X2 adheres, and a number of the fine particles X2 is in a range of 40% to 70% of the total number of the fine particles. 5. An air electrode of solid oxide fuel cells obtained by sintering the air electrode material powder of solid oxide fuel cells according to claim 1 . 6. An air electrode of solid oxide fuel cells obtained by sintering the air electrode material powder of solid oxide fuel cells according to claim 2 . 7. An air electrode of solid oxide fuel cells obtained by sintering the air electrode material powder of solid oxide fuel cells according to claim 3 . 8. An air electrode of solid oxide fuel cells obtained by sintering the air electrode material powder of solid oxide fuel cells according to claim 4 . 9. A current collector for solid oxide fuel cells obtained by sintering the air electrode material powder for solid oxide fuel cells according to claim 1 . 10. A current collector for solid oxide fuel cells obtained by sintering the air electrode material powder for solid oxide fuel cells according to claim 2 . 11. A current collector for solid oxide fuel cells obtained by sintering the air electrode material powder for solid oxide fuel cells according to claim 3 . 12. A current collector for solid oxide fuel cells obtained by sintering the air electrode material powder for solid oxide fuel cells according to claim 4 .
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Classifications
- H01M4/8621Primary
containing only metallic or ceramic material, e.g. made by sintering or sputtering · CPC title
- H01M4/9033Primary
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 · CPC title
characterised by the electrode/electrolyte combination or the supporting material · CPC title
Positive electrodes · CPC title
based on rare-earth compounds {(non-oxide rare earth compounds C04B35/5156)} · CPC title
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- What does patent US11515545B2 cover?
- The invention provides an air electrode material powder for solid oxide fuel cells, comprising particles of a perovskite composite oxide represented by the general formula ABO3, and comprising La and Sr as the A-site elements, and Co and Fe as the B-site elements.
- Who is the assignee on this patent?
- Sakai Chemical Industry Co
- What technology area does this patent fall under?
- Primary CPC classification H01M4/8621. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 29 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).