Thermal Spraying for Solid Oxide Cell Protection
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Summary
Problems
Solid oxide fuel cell (SOFC) and electrolyzer stacks face challenges with thermal management due to significant thermal gradients, leading to unacceptable stresses and reduced electric efficiency, while existing protective coatings are costly and prone to degradation from chromium migration and chemical reactions with sealing materials.
Innovation solutions
A protection arrangement using simultaneous thermal spraying of liquid precursor-based coatings with high electrical conductivity, formed from nitrates and acetates substances, to create multi-layered coatings with a dense microstructure, reducing chromium migration and enhancing electrical efficiency.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If conventional thermal spraying techniques are used to form protective coatings, then protective coverage is achieved, but the process is time-consuming and difficult to control
Why choose this principle:
The patent combines multiple coating layers (protective layer and contact layer) into a single simultaneous spraying process, eliminating sequential processing steps and reducing total coating time while maintaining protective functionality
Principle concept:
If conventional thermal spraying techniques are used to form protective coatings, then protective coverage is achieved, but the process is time-consuming and difficult to control
Why choose this principle:
The invention changes the physical state of the coating material from conventional powder form to liquid precursor form, enabling better control during spraying and faster deposition rates while maintaining coating quality
Application Domain
Data Source
AI summary:
A protection arrangement using simultaneous thermal spraying of liquid precursor-based coatings with high electrical conductivity, formed from nitrates and acetates substances, to create multi-layered coatings with a dense microstructure, reducing chromium migration and enhancing electrical efficiency.
Abstract
A protection arrangement of solid oxide cells, each solid oxide cell having at least two fuel cell structure plates made of metal to arrange gas flows in the cell, and an active electrode structure, which includes an anode side, a cathode side, and an electrolyte element between the anode side and the cathode side. The protection arrangement can include: a first material coating on a metallic structure in a first thermal spraying coating process of liquid precursor being from at least one of nitrates and acetates based substances fed into thermal flame; and at least one other coating formed at least partly simultaneously with the first coating process on a previously deposited coating from liquid precursor.