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Title: A Finite Length Cylinder Model for Mixed Oxide-Ion and Electron Conducting Cathodes Suited for Intermediate-Temperature Solid Oxide Fuel Cells

A physics-based model is presented to simulate the electrochemical behavior of mixed ion and electron conducting (MIEC) cathodes for intermediate-temperature solid oxide fuel cells. Analytic solutions for both transient and impedance models based on a finite length cylinder are derived. These solutions are compared to their infinite length counterparts. The impedance solution is also compared to experimental electrochemical impedance spectroscopy data obtained from both a traditional well-established La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ (LSCF) cathode and a new SrCo 0.9Nb 0.1O 3-δ (SCN) porous cathode. Lastly, the impedance simulations agree well with the experimental values, demonstrating that the new models can be used to extract electro-kinetic parameters of MIEC SOFC cathodes.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1]
  1. Univ. of South Carolina, Columbia, SC (United States)
  2. Univ. of South Carolina, Columbia, SC (United States); Yangtze Univ., Jingzhou, Hubei (China). Applied Physics and Information Technology Research Center
  3. Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering
Publication Date:
Grant/Contract Number:
AR0000492
Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 163; Journal Issue: 6; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Research Org:
Univ. of South Carolina, Columbia, SC (United States)
Sponsoring Org:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; cathode; electrochemical impedance spectroscopy; mixed ion and electron conductors; oxygen reduction reaction; solid oxide fuel cells
OSTI Identifier:
1437586

Jin, Xinfang, Wang, Jie, Jiang, Long, White, Ralph E., and Huang, Kevin. A Finite Length Cylinder Model for Mixed Oxide-Ion and Electron Conducting Cathodes Suited for Intermediate-Temperature Solid Oxide Fuel Cells. United States: N. p., Web. doi:10.1149/2.1011606jes.
Jin, Xinfang, Wang, Jie, Jiang, Long, White, Ralph E., & Huang, Kevin. A Finite Length Cylinder Model for Mixed Oxide-Ion and Electron Conducting Cathodes Suited for Intermediate-Temperature Solid Oxide Fuel Cells. United States. doi:10.1149/2.1011606jes.
Jin, Xinfang, Wang, Jie, Jiang, Long, White, Ralph E., and Huang, Kevin. 2016. "A Finite Length Cylinder Model for Mixed Oxide-Ion and Electron Conducting Cathodes Suited for Intermediate-Temperature Solid Oxide Fuel Cells". United States. doi:10.1149/2.1011606jes. https://www.osti.gov/servlets/purl/1437586.
@article{osti_1437586,
title = {A Finite Length Cylinder Model for Mixed Oxide-Ion and Electron Conducting Cathodes Suited for Intermediate-Temperature Solid Oxide Fuel Cells},
author = {Jin, Xinfang and Wang, Jie and Jiang, Long and White, Ralph E. and Huang, Kevin},
abstractNote = {A physics-based model is presented to simulate the electrochemical behavior of mixed ion and electron conducting (MIEC) cathodes for intermediate-temperature solid oxide fuel cells. Analytic solutions for both transient and impedance models based on a finite length cylinder are derived. These solutions are compared to their infinite length counterparts. The impedance solution is also compared to experimental electrochemical impedance spectroscopy data obtained from both a traditional well-established La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode and a new SrCo0.9Nb0.1O3-δ (SCN) porous cathode. Lastly, the impedance simulations agree well with the experimental values, demonstrating that the new models can be used to extract electro-kinetic parameters of MIEC SOFC cathodes.},
doi = {10.1149/2.1011606jes},
journal = {Journal of the Electrochemical Society},
number = 6,
volume = 163,
place = {United States},
year = {2016},
month = {3}
}