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Title: Electrochemical-mechanical coupling in composite planar structures that integrate flow channels and ion-conducting membranes

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0321707jes· OSTI ID:1357138
 [1];  [2];  [2];  [3];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Colorado School of Mines, Golden, CO (United States)
  2. Colorado School of Mines, Golden, CO (United States)
  3. CoorsTek, Inc., Golden, CO (United States)

Ceramic oxygen-transport membranes, such as the doped perovskite La0.6Sr0.4Co0.8Fe0.2O3-δ(LSCF6482) considered in the present paper, are effective in applications such as air separation. The present paper considers a planar configuration that is composed of a thin (order tens of microns) ion-transport membrane, a relatively thick (order millimeter) porous-ceramic support structure, and millimeter-scale oxygen-collection flow channels. The lattice-scale strain associated with charged defects (oxygen vacancies and small polarons) within ion-transport membranes causes macroscopic stress that could distort or damage the assembly. The modeling approach is based on an extended twodimensional Nernst–Planck–Poisson (NPP) formulation that is developed and applied to evaluate the effects of chemically induced stress within a planar oxygen-separation assembly. The computational model predicts two-dimensional distributions of steady-state defect concentrations, electrostatic potentials, and stress. Parameter studies consider the effects of support-membrane dimensions, materials mechanical properties, and operating conditions. Although the stress is found to have a negligible influence on the defect transport, the defect transport is found to significantly affect the stress distributions. Such results can play important roles in the design and development of planar ion-transport membranes and their support structures.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1357138
Report Number(s):
LA-UR-17-22472
Journal Information:
Journal of the Electrochemical Society, Vol. 164, Issue 7; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (33)

Discussion: “Edge-Bonded Dissimilar Orthogonal Elastic Wedges Under Normal and Shear Loading” (Bogy, D. B., 1968, ASME J. Appl. Mech., 35, pp. 460–466) journal September 1969
Advances in ion transport membrane technology for Syngas production journal June 2014
Advances in ion transport membrane technology for oxygen and syngas production journal May 2016
Defining chemical expansion: the choice of units for the stoichiometric expansion coefficient journal January 2014
Stress singularities in a two-material wedge journal September 1971
On Green’s function for a bimaterial elastic half-plane journal May 2003
Defect-Transport-Induced Stress in Mixed Ionic-Electronic Conducting (MIEC) Ceramic Membranes journal January 2016
Two Edge-Bonded Elastic Wedges of Different Materials and Wedge Angles Under Surface Tractions journal June 1971
Chemically-induced stresses in gadolinium-doped ceria solid oxide fuel cell electrolytes journal March 1997
Membrane polarization in mixed-conducting ceramic fuel cells and electrolyzers journal January 2016
Nanoindentation of porous bulk and thin films of La0.6Sr0.4Co0.2Fe0.8O3−δ journal September 2013
Chemical potential for diffusion in a stressed solid journal January 1981
Fracture Toughness of Porous Material of LSCF in Bulk and Film Forms journal March 2015
Ion transport membrane technology for oxygen separation and syngas production journal October 2000
Coupling effects of oxygen surface exchange kinetics and membrane thickness on chemically induced stresses in perovskite-type membranes journal March 2012
Process intensification in the catalytic conversion of natural gas to fuels and chemicals journal January 2017
Surface stress and the chemical equilibrium of small crystals—II. Solid particles embedded in a solid matrix journal January 1982
Mechanical properties of mixed conducting La0.5Sr0.5Fe1−x Co x O3−δ (0≤x≤1) materials journal April 2006
Thermo-chemical lattice expansion in La0.6Sr0.4Co1−yFeyO3−δ journal June 2013
Mechanical Properties of La 1- x Sr x Co 0.2 Fe 0.8 O 3 Mixed-Conducting Perovskites Made by the Combustion Synthesis Technique journal June 2000
Thermo-Chemical Expansion in Strontium-Doped Lanthanum Cobalt Iron Oxide: Thermo-Chemical Expansion in LSCF journal September 2010
Physical chemistry of some microstructural phenomena journal October 1978
Chemical Expansivity of Electrochemical Ceramics journal September 2001
Mixed ionic–electronic conducting (MIEC) ceramic-based membranes for oxygen separation journal July 2008
Defect structure and defect-induced expansion of doped perovskite La 0.7 Sr 0.3 Co 0.9 Fe 0.1 O 3−δ journal December 2014
Edge-Bonded Dissimilar Orthogonal Elastic Wedges Under Normal and Shear Loading journal September 1968
Chemical Expansion: Implications for Electrochemical Energy Storage and Conversion Devices journal July 2014
Chemically Induced Stress in Tubular Mixed Ionic-Electronic Conducting (MIEC) Ceramic Membranes journal January 2016
Electrical Conductivity and Oxygen Diffusivity of Perovskite-Type Solid Solution La 0.6 Sr 0.4 Co 1-y Fe y O 3-δ (y=0.2, 0.4, 0.5, 0.6, 0.8) journal April 2011
Interpreting equilibrium-conductivity and conductivity-relaxation measurements to establish thermodynamic and transport properties for multiple charged defect conducting ceramics journal January 2015
Elastic Green's function for a bimaterial composite solid containing a free surface normal to the interface journal December 1991
Generation and Distribution of Dislocations by Solute Diffusion journal October 1961
Understanding chemical expansion in perovskite-structured oxides journal January 2015

Cited By (2)

Prediction of Material Properties of Ceramic Composite Material by Porous Structure and Porosity Using the Finite Element Method journal April 2019
Chemo-Thermo-Mechanical Coupling in Protonic Ceramic Fuel Cells from Fabrication to Operation journal January 2019

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