Electrochemical Performances of a Solid Oxide Electrolysis Short Stack Under Multiple Steady-State and Cycling Operating Conditions

Solid oxide electrolysis cells (SOECs) are increasingly utilized in hydrogen production from renewable energy sources, yet high degradation rates and unclear degradation mechanisms remain significant barriers to their large-scale application. Consequently, endurance testing of stacks under various o...

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Bibliographic Details
Published in:Inorganics 2024-11, Vol.12 (11), p.288
Main Authors: Ma, Qinhui, Zuo, Yuhang, Lu, Kaifeng, Rong, Yangyiming, Su, Wei, Chen, Hanming, Xu, Xinhai
Format: Article
Language:English
Subjects:
Alternative energy sources
Analysis
Current density
Cycles
Degradation
durability
Electric rates
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrochemistry
Electrodes
Electrolysis
Electrolytes
Electrolytic cells
Fatigue tests
High current
Hydrogen
Hydrogen as fuel
Hydrogen production
Low currents
operating conditions
Relaxation time
Renewable energy sources
solid oxide electrolysis cell (SOEC)
Spectroscopy
Stacks
Temperature
temperature cycles
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Summary:Solid oxide electrolysis cells (SOECs) are increasingly utilized in hydrogen production from renewable energy sources, yet high degradation rates and unclear degradation mechanisms remain significant barriers to their large-scale application. Consequently, endurance testing of stacks under various operating conditions and studying the degradation mechanisms associated with these conditions is imperative. However, due to the generally poor performance consistency among stacks, multi-condition data from numerous stacks lack reliability. In this experimental study, having established a specific SOEC stack’s performance and optimal conditions, durability tests under varied conditions, including various current densities, current operation modes (cyclic or constant current), fuel utilization rates, and temperature cycles were conducted. Electrochemical analysis tools like electrochemical impedance spectroscopy and distribution of relaxation time were employed to analyze the causes of voltage fluctuations under high current densities. The results confirmed that the SOEC stack could handle current cycling at low current densities and constant-current electrolysis at high current densities and withstand at least two temperature cycles.
ISSN:2304-6740
2304-6740
DOI:10.3390/inorganics12110288