Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/62265
Title: Electrochemical fields within 3D reconstructed microstructures of mixed ionic and electronic conducting devices
Authors: Zhang, Y
Chen, Y
Lin, Y
Yan, M
Harris, WM
Chiu, WKS
Ni, M 
Chen, F
Keywords: 3D microstructure
Electrolysis
Fuel cells
Mixed ionic and electronic conductors (MIEC)
Permeation membrane
Issue Date: 2016
Publisher: Elsevier
Source: Journal of power sources, 2016, v. 331, p. 167-179 How to cite?
Journal: Journal of power sources 
Abstract: The performance and stability of the mixed ionic and electronic conducting (MIEC) membrane devices, such as solid oxide cells (SOCs) and oxygen separation membranes (OSMs) interplay tightly with the transport properties and the three-dimensional (3D) microstructure of the membrane. However, development of the MIEC devices is hindered by the limited knowledge about the distribution of electrochemical fields within the 3D local microstructures, especially at surface and interface. In this work, a generic model conforming to local thermodynamic equilibrium is developed to calculate the electrochemical fields, such as electric potential and oxygen chemical potential, within the 3D microstructure of the MIEC membrane. Stability of the MIEC membrane is evaluated by the distribution of oxygen partial pressure. The cell-level performance such as polarization resistance and voltage vs. current curve can be further calculated. Case studies are performed to demonstrate the capability of the framework by using X-ray computed tomography reconstructed 3D microstructures of a SOC and an OSM. The calculation method demonstrates high computational efficiency for large size 3D tomographic microstructures, and permits parallel calculation. The framework can serve as a powerful tool for correlating the transport properties and the 3D microstructure to the performance and the stability of MIEC devices.
URI: http://hdl.handle.net/10397/62265
ISSN: 0378-7753
EISSN: 1873-2755
DOI: 10.1016/j.jpowsour.2016.09.003
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

1
Citations as of Aug 11, 2017

WEB OF SCIENCETM
Citations

1
Last Week
0
Last month
Citations as of Aug 14, 2017

Page view(s)

17
Last Week
1
Last month
Checked on Aug 13, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.