A Distributed Electrochemistry Modeling Tool for Simulating SOFC Performance and Degradation

Recknagle, Kurtis P. ; Ryan, Emily M. ; Khaleel, Mohammad A.

Pacific Northwest National Laboratory (U.S.)

关键词: Oxidizers;    Decay;    Electrodes;    Fuel Gas;    30 Direct Energy Conversion;   

DOI  :  10.2172/1029092
RP-ID  :  PNNL-20555
RP-ID  :  AC05-76RL01830
RP-ID  :  1029092

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report presents a distributed electrochemistry (DEC) model capable of investigating the electrochemistry and local conditions with the SOFC MEA based on the local microstructure and multi-physics. The DEC model can calculate the global current-voltage (I-V) performance of the cell as determined by the spatially varying local conditions through the thickness of the electrodes and electrolyte. The simulation tool is able to investigate the electrochemical performance based on characteristics of the electrode microstructure, such as particle size, pore size, electrolyte and electrode phase volume fractions, and triple-phase-boundary length. It can also investigate performance as affected by fuel and oxidant gas flow distributions and other environmental/experimental conditions such as temperature and fuel gas composition. The long-term objective for the DEC modeling tool is to investigate factors that cause electrode degradation and the decay of SOFC performance which decrease longevity.