Solid Oxide Cell with Nickel-Free Fuel Electrode

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This patent describes a solid oxide cell (SOC), such as fuel cells or electrolysis cells, that uses a nickel-free fuel electrode made from doped cerium oxide (Ce1-xMxO2-δ, where M can be praseodymium, lanthanum, samarium, or neodymium). The new electrode offers improved long-term stability and performance compared to conventional nickel-based electrodes, especially in systems that operate at high temperatures and use various gas compositions, including hydrogen, water vapor, carbon monoxide, and carbon dioxide.

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• Solid oxide fuel cells (SOFCs) for clean and efficient power generation in residential, commercial, and industrial settings.
• Reversible solid oxide cells (RSOCs) for both electricity generation and chemical energy storage in energy grids.
• Solid oxide electrolysis cells (SOECs) for producing hydrogen or syngas from water and carbon dioxide electrolysis, suitable for fuel production and industrial applications.
• Operation in fuel cell stacks for powering vehicles, backup power systems, and grid-scale energy storage.
• Use in harsh environments or variable gas mixtures where conventional nickel-based electrodes degrade quickly.

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• Eliminates or drastically reduces the reliance on nickel, mitigating issues like long-term degradation and instability in traditional electrodes.
• Enhances durability and long-term performance of solid oxide cells, extending operational lifetimes and reducing maintenance costs.
• Provides high electrochemical performance across various operating conditions and gas compositions, including steam and CO2 electrolysis.
• Reduces risk of delamination and compatibility issues due to better thermal expansion matching among cell materials.
• Supports advanced manufacturing techniques and flexible cell designs, opening possibilities for broader industrial adoption and new energy applications.

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Patent Abstract

The invention relates to a solid oxide cell with an electrolyte (2), wherein gas-permeable electrical conductors are arranged on opposite sides of the electrolyte (2) as an anode (1) and cathode (3), characterized in that the anode (1) consists of Ce1-xMxO2-δ with M = praseodymium (Pr) and/or lanthanum (La) or comprises Ce1-xMxO2-δ with M = praseodymium (Pr) and/or lanthanum (La).