Lifetime and performance of solid oxide electrolysis stacks and systems under different operation modes and conditions

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Abstract

Despite significant efforts to extend the performance and durability of solid oxide electrolysis (SOE) cells, few studies have focused on assessing the optimal operating strategies for SOE systems. The optimal trade-off between specific production rate, degradation rate, and stack lifetime has not been addressed yet. Thus, this study proposes a novel modeling framework to predict the performance, degradation, and lifetime of SOE stacks by considering various failure criteria across different components. To showcase its potential, the lifetime of SOE stacks under two operating modes (i.e., Galvanostatic and new Potentio-Galvanostatic) are compared under various conditions, highlighting their different performance and the critical failures limiting their lifetime. Optimization results indicate that, at the current density of 0.6 A/cm2, it is possible to reach a lifetime of higher than 50,000 h. The developed methodology can be used to determine safe operational practices necessary for scaling up SOE systems.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Volume102
Pages (from-to)980-995
Number of pages16
ISSN0360-3199
DOIs
Publication statusPublished - 2025

Keywords

  • Solid oxide electrolysis
  • Performance degradation
  • Galvanostatic
  • Potentio-Galvanostatic
  • Lifetime
  • Failure criteria

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