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Call attention to using DRT and EIS to quantify the contributions of solid oxide cell components to the total impedance

Journal Article · · International Journal of Hydrogen Energy
 [1];  [2];  [2]
  1. Univ. of Louisiana, Lafayette, LA (United States); OSTI
  2. Univ. of Louisiana, Lafayette, LA (United States)
The contributions of anode and cathode processes to solid oxide fuel cell (SOFC) impedance were studied using electrochemical impedance spectroscopy (EIS) and distribution of relaxation time (DRT). Specifically, the role of gas composition at both anode and cathode was explored in a systematic study aimed at deconvoluting, identifying and quantifying the contributions of different anode and cathode processes. Further, five distinct relaxation time distributions were observed in the DRT spectra; although the peaks were ascribed to diffusion and charge transfer processes at the electrodes, it was found that both electrodes contributed to various peaks at the same time. Moreover, it was found that two distinctive operating conditions could return equivalent DRT spectra. While DRT analysis allows to obtain useful information regarding cell performance, extra consideration is needed when assessing and quantifying anodic and cathodic resistances within the SOFC.
Research Organization:
Univ. of Louisiana, Lafayette, LA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0009421; FE0031667
OSTI ID:
2418801
Alternate ID(s):
OSTI ID: 1892089
Journal Information:
International Journal of Hydrogen Energy, Journal Name: International Journal of Hydrogen Energy Journal Issue: 83 Vol. 47; ISSN 0360-3199
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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