Characterization of electrode polarization losses in solid oxide fuel cells: Impedance spectroscopy involving spatially-limited electrode geometry

2013 ◽  
Vol 74 (3) ◽  
pp. 496-503 ◽  
Author(s):  
Byung-Kook Lee ◽  
Seung-Muk Bae ◽  
Jong-Ho Lee ◽  
Jinha Hwang
Keyword(s):  
Fuel Cells ◽  
Impedance Spectroscopy ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Electrode Polarization ◽  
Electrode Geometry ◽  
Oxide Fuel

scholarly journals A Bulk-Heterostructure Nanocomposite Electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for Low-Temperature Solid Oxide Fuel Cells

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Yixiao Cai ◽  
Yang Chen ◽  
Muhammad Akbar ◽  
Bin Jin ◽  
Zhengwen Tu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Ionic Conductivity ◽  
Low Temperature ◽  
Solid Oxide Fuel Cells ◽  
Short Circuit ◽  
Solid Oxide ◽  
Superior Performance ◽  
Electrode Polarization ◽  
Oxide Fuel ◽  
Ac Impedance Analysis

AbstractSince colossal ionic conductivity was detected in the planar heterostructures consisting of fluorite and perovskite, heterostructures have drawn great research interest as potential electrolytes for solid oxide fuel cells (SOFCs). However, so far, the practical uses of such promising material have failed to materialize in SOFCs due to the short circuit risk caused by SrTiO3. In this study, a series of fluorite/perovskite heterostructures made of Sm-doped CeO2 and SrTiO3 (SDC–STO) are developed in a new bulk-heterostructure form and evaluated as electrolytes. The prepared cells exhibit a peak power density of 892 mW cm−2 along with open circuit voltage of 1.1 V at 550 °C for the optimal composition of 4SDC–6STO. Further electrical studies reveal a high ionic conductivity of 0.05–0.14 S cm−1 at 450–550 °C, which shows remarkable enhancement compared to that of simplex SDC. Via AC impedance analysis, it has been shown that the small grain-boundary and electrode polarization resistances play the major roles in resulting in the superior performance. Furthermore, a Schottky junction effect is proposed by considering the work functions and electronic affinities to interpret the avoidance of short circuit in the SDC–STO cell. Our findings thus indicate a new insight to design electrolytes for low-temperature SOFCs.

ChemInform Abstract: Characterization of Thin Films for Solid Oxide Fuel Cells Facilitated by Micropatterning

ChemInform ◽  
2012 ◽  
Vol 43 (26) ◽  
pp. no-no
Author(s):  
Thomas Ryll ◽  
Jennifer L. M. Rupp ◽  
Anja Bieberle-Hutter ◽  
Henning Galinski ◽  
Ludwig J. Gauckler
Keyword(s):  
Thin Films ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Abstract Characterization

Characterization of tantalum doped lanthanum strontium ferrite as cathode materials for solid oxide fuel cells

2015 ◽  
Vol 648 ◽  
pp. 154-159 ◽  
Author(s):  
Isabella Natali Sora ◽  
Valeria Felice ◽  
Francesca Zurlo ◽  
Silvia Licoccia ◽  
Elisabetta Di Bartolomeo
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Cathode Materials ◽  
Strontium Ferrite ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Lanthanum Strontium
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