A Finite Length Cylinder Model for Mixed Oxide-Ion and Electron Conducting Cathodes Suited for Intermediate-Temperature Solid Oxide Fuel Cells. Issue 6 (25th March 2016)

• Record Type: Journal Article
• Authors: Jin, Xinfang; Wang, Jie; Jiang, Long; White, Ralph E.; Huang, Kevin
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 6(2016)
• Page Start: F548
• Page End: F563
• Publication Date: 2016-03-25
• Subjects: cathode -- electrochemical impedance spectroscopy -- mixed ion and electron conductors -- oxygen reduction reaction -- solid oxide fuel cells; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1011606jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : 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 La0.6 Sr0.4 Co0.2 Fe0.8 O3-δ (LSCF) cathode and a new SrCo0.9 Nb0.1 O3-δ (SCN) porous cathode. 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.