scholarly journals Improved stability of reversible solid oxide cells with a nickelate-based oxygen electrode

2016 ◽  
Vol 4 (4) ◽  
pp. 1446-1453 ◽  
Author(s):  
M. A. Laguna-Bercero ◽  
H. Monzón ◽  
A. Larrea ◽  
V. M. Orera
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Oxygen Electrode ◽  
Solid Oxide ◽  
Oxygen Electrodes ◽  
Improved Stability ◽  
Electrode Interface ◽  
And Performance ◽  
The Stability ◽  
Fuel Cell Operation

Mixed praseodymium, cerium and gadolinium oxides (PCGO) at the electrolyte–oxygen electrode interface enhance the stability and performance of nickelate based oxygen electrodes in high temperature electrolysis and fuel cell operation modes.

Enhanced Performance of Ag-Doped Oxygen Electrode Based Solid Oxide Electrolyser Cell under High Temperature Electrolysis of Steam

2014 ◽  
Vol 783-786 ◽  
pp. 1708-1713
Author(s):  
Su Hu ◽  
Qing Shan Li ◽  
Yi Feng Zheng ◽  
Shi Hao Wei ◽  
Cheng Xu
Keyword(s):  
High Temperature ◽  
Large Scale ◽  
Oxygen Electrode ◽  
Solid Oxide ◽  
Solid State Method ◽  
Oxygen Electrodes ◽  
Potential Applications ◽  
Improved Performance ◽  
High Temperature Electrolysis

Solid oxide electrolyser (SOE) has been receiving increasing attention due to its potential applications in large-scale hydrogen production and carbon dioxide recycling for fuels. Improving the performance of SOE cell through oxygen electrode development has been of main interest because the major polarization loss of the SOE cell is at the oxygen electrode during high temperature electrolysis (HTE). In the present study, Ag was doped into (La0.75Sr0.25)0.95MnO3+δ(LSM) based oxygen electrode of Ni/YSZ cathode-supported SOE cell through a solid state method enhanced by ball milling. Short stacks were manufactured using doped and undoped cells and tested under HTE of steam at 800°C up to 150h for in situ comparative study of doping effect. The cells with doped oxygen electrodes showed less polarization loss, lower resistance and improved performance by comparison with the undoped cell. Post-mortem examination revealed Ag migrated from the current collecting layer to the electrolyte/anode interface, which may promote the cell performance.

Effect of Ag-(La0.8Sr0.2)0.95MnO3 current-collecting layer on the stability of anode-supported solid oxide fuel cell

2010 ◽  
Vol 496 (1-2) ◽  
pp. 433-435 ◽  
Author(s):  
C.H. Zhao ◽  
R.Z. Liu ◽  
L. Shao ◽  
S.R. Wang ◽  
T.L. Wen
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
The Stability

Oxygen electrode design criteria and performance characteristics: recessed cathode

1978 ◽  
Vol 45 (1) ◽  
pp. 145-154 ◽  
Author(s):  
G. Schneiderman ◽  
T. K. Goldstick
Keyword(s):  
Measurement Error ◽  
Performance Optimization ◽  
Surrounding Medium ◽  
Three Dimensional ◽  
Concentration Field ◽  
Oxygen Electrode ◽  
Current Sensitivity ◽  
Steady State Operation ◽  
Oxygen Electrodes ◽  
And Performance

A computer simulation of the steady-state operation of recessed (Whalen-type) polarographic oxygen electrodes has been developed to give the design factors important for performance optimization. The simulation makes use of a specially formulated three-dimensional orthogonal coordinate system with the geometry identical to the actual recessed cathode and gives the oxygen concentration field induced by it in the surrounding medium. Equations are presented which allow one to calculate, for any recessed cathode, the current sensitivity, maximum stirring artifact, measurement error, and time constant. Comparisons with analytically obtained expressions for the corresponding quantities for idealized, spherosymmetric cathodes demonstrate the unique aspects of recessed-cathode performance. For commonly used electrodes, a recess length-to-cathode diameter ratio of greater than 10 is found to give a negligible stirring artifact, a negligible measurement error, and a rapid response.

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