# US 11,909,085 B2 · Air electrodes of solid oxide electrochemical cells

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- Number: US 11,909,085 B2
- Document ID: US11909085B2
- Status: Granted
- Kind: B2
- Application number: 17/476,032
- Filed: 2021-09-15
- Published: 2022-04-07
- Granted: 2024-02-20
- Earliest claimed: 2020-10-01
- Assignees: Phillips 66 Company; Georgia Tech Research Corporation
- Applicants: Phillips 66 Company; Georgia Tech Research Corporation
- Inventors: Weilin Zhang; Meilin Liu; Ying Liu; Yucun Zhou
- Web page: https://patentgrep.com/patent/US11909085B2

## CPC

- H01M 8/186: {by electrolytic decomposition of the electrolytic solution or the formed water product}
- C01G 51/70: containing rare earths, e.g. LaCoO3 (C01G51/68 takes precedence)
- C25B 1/04: by electrolysis of water
- H01M 8/1213: characterised by the electrode/electrolyte combination or the supporting material
- C01P 2002/54: one element only
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2002/85: by XPS, EDX or EDAX data
- C01P 2004/04: obtained by TEM, STEM, STM or AFM
- C01P 2006/40: Electric properties
- H01M 2008/1293: {Fuel cells with solid oxide electrolytes}
- Y02E 60/36: Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
- Y02E 60/50: Fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C25B: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR (anodic or cathodic protection C23F13/00; single-crystal growth C30B)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Disclosed are air electrode materials suitable for use in solid oxide electrochemical cells (SOCs). The disclosed cells can operate in a dual function modes, i.e., as a fuel cell and as an electrolysis cell. In both cases, chemical energy and electrical energy can be directly convert from one mode to the other; thereby providing a highly efficient energy conversion process that can be used as a sustainable energy source.

## Claims

### Claim 1

A multi-functional air electrode for solid oxide electrochemical cells, comprising: PrBa0.9Co1.96Nb0.04O5+δ.