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- W4205832201 abstract "Idaho National Laboratory has an ongoing project to generate hydrogen from steam using solid oxide electrolysis cells (SOECs). To accomplish this, technical and degradation issues associated with the SOECs will need to be addressed. This report covers various approaches being pursued to model degradation issues in SOECs. An electrochemical model for degradation of SOECs is presented. The model is based on concepts in local thermodynamic equilibrium in systems otherwise in global thermodynamic non-equilibrium. It is shown that electronic conduction through the electrolyte, however small, must be taken into account for determining local oxygen chemical potential,, within the electrolyte. The within the electrolyte may lie out of bounds in relation to values at the electrodes in the electrolyzer mode. Under certain conditions, high pressures can develop in the electrolyte just near the oxygen electrode/electrolyte interface, leading to oxygen electrode delamination. These predictions are in accordance with the reported literature on the subject. Development of high pressures may be avoided by introducing some electronic conduction in the electrolyte. By combining equilibrium thermodynamics, non-equilibrium (diffusion) modeling, and first-principles, atomic scale calculations were performed to understand the degradation mechanisms and provide practical recommendations on how to inhibit and/or completely mitigate them." @default.
- W4205832201 created "2022-01-25" @default.
- W4205832201 creator A5012461959 @default.
- W4205832201 date "2011-09-01" @default.
- W4205832201 modified "2023-09-26" @default.
- W4205832201 title "Modeling Degradation in Solid Oxide Electrolysis Cells - Volume II" @default.
- W4205832201 doi "https://doi.org/10.2172/1031675" @default.
- W4205832201 hasPublicationYear "2011" @default.
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