Enhancing electrochemical performance by control of transport properties in buffer layers – solid oxide fuel/electrolyser cells

2015 ◽  
Vol 17 (17) ◽  
pp. 11527-11539 ◽  
Author(s):  
Devaraj Ramasamy ◽  
Narendar Nasani ◽  
Ana D. Brandão ◽  
Domingo Pérez Coll ◽  
Duncan P. Fagg
Keyword(s):  
Electrochemical Performance ◽  
Transport Properties ◽  
Buffer Layer ◽  
Active Sites ◽  
Electrode Reaction ◽  
Oxygen Electrode ◽  
Solid Oxide ◽  
Buffer Layers ◽  
Oxide Fuel ◽  
Oxygen Electrode Reaction

Extension of electrocatalytically active sites for oxygen electrode reaction by the presence of a mixed conducting buffer layer.

scholarly journals The Effect of Fabrication Conditions for GDC Buffer Layer on Electrochemical Performance of Solid Oxide Fuel Cells

2013 ◽  
Vol 5 (3) ◽  
pp. 151-158 ◽  
Author(s):  
Jung-Hoon Song ◽  
Myung Geun Jung ◽  
Hye Won Park ◽  
Hyung-Tae Lim
Keyword(s):  
Fuel Cells ◽  
Electrochemical Performance ◽  
Solid Oxide Fuel Cells ◽  
Buffer Layer ◽  
Solid Oxide ◽  
Oxide Fuel

scholarly journals Micro-Tubular Solid Oxide Fuel Cell Polarization and Impedance Variation With Thin Porous Samarium-Doped Ceria and Gadolinium-Doped Ceria Buffer Layer Thickness

2020 ◽  
Vol 18 (2) ◽  
Author(s):  
Ryan J. Milcarek ◽  
Jeongmin Ahn
Keyword(s):  
Buffer Layer ◽  
Layer Thickness ◽  
Electrochemical Impedance ◽  
Cell Polarization ◽  
Solid Oxide ◽  
Buffer Layers ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Buffer Layer Thickness ◽  
Gadolinium Doped Ceria

Abstract Porous buffer layers for anode-supported solid oxide fuel cells (SOFCs) have been investigated for many years with different thicknesses of the buffer layer in each study. In this work, micro-tubular SOFCs having samarium-doped ceria (SDC) and gadolinium-doped ceria (GDC) buffer layers are compared using the current–voltage technique, electrochemical impedance spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The thickness of the porous SDC and GDC buffer layer is investigated systematically with the thickness varying between 0.3 and 2.0 μm. The power density varies between 212 and 1004 mW/cm2 for samples having different SDC buffer layer thickness. Comparable changes occur for the SOFCs with a GDC buffer layer, but less variation in polarization losses resulted. Variation in electrochemical performance varies due to changes in ohmic resistance, cathode activation polarization, and interfacial reactions between the cathode and electrolyte materials.

Phase Inversion Tape Casting and Electrochemical Performance of Solid Oxide Fuel Cell Anode

2015 ◽  
Vol 30 (12) ◽  
pp. 1291
Author(s):  
ZHANG Yu-Yue ◽  
LIN Jie ◽  
MIAO Guo-Shuan ◽  
GAO Jian-Feng ◽  
CHEN Chu-Sheng ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Electrochemical Performance ◽  
Solid Oxide Fuel Cell ◽  
Phase Inversion ◽  
Tape Casting ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Cell Anode ◽  
Fuel Cell Anode

scholarly journals Computational engineering of the oxygen electrode-electrolyte interface in solid oxide fuel cells

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Kaiming Cheng ◽  
Huixia Xu ◽  
Lijun Zhang ◽  
Jixue Zhou ◽  
Xitao Wang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Microstructure Evolution ◽  
Oxygen Electrode ◽  
Solid Oxide ◽  
Ohmic Loss ◽  
Oxide Fuel ◽  
Computational Engineering ◽  
Electrolyte Interface

AbstractThe Ce0.8Gd0.2O2−δ (CGO) interlayer is commonly applied in solid oxide fuel cells (SOFCs) to prevent chemical reactions between the (La1−xSrx)(Co1−yFey)O3−δ (LSCF) oxygen electrode and the Y2O3-stabilized ZrO2 (YSZ) electrolyte. However, formation of the YSZ–CGO solid solution with low ionic conductivity and the SrZrO3 (SZO) insulating phase still happens during cell production and long-term operation, causing poor performance and degradation. Unlike many experimental investigations exploring these phenomena, consistent and quantitative computational modeling of the microstructure evolution at the oxygen electrode–electrolyte interface is scarce. We combine thermodynamic, 1D kinetic, and 3D phase-field modeling to computationally reproduce the element redistribution, microstructure evolution, and corresponding ohmic loss of this interface. The influences of different ceramic processing techniques for the CGO interlayer, i.e., screen printing and physical laser deposition (PLD), and of different processing and long-term operating parameters are explored, representing a successful case of quantitative computational engineering of the oxygen electrode–electrolyte interface in SOFCs.

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