Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5145219 | International Journal of Hydrogen Energy | 2017 | 23 Pages |
Abstract
In a planar solid oxide fuel cell (SOFC) stack, a number of individual cells are stacked together to increase the voltage and power output. At both the cathode- and anode-interconnect interfaces, electrical contact layers are applied between the interconnect and electrodes during cell fabrication process or stack assembly to increase the electrode-interconnect contact area and to compensate for dimensional tolerance variation of the contacting components, thus minimizing ohmic contact resistance throughout the stack. As such, electrical contact is an essential component in SOFC stacks. In this paper, we review the cathode-side electrical contact design and contact materials for application in SOFC stacks. Following an introduction of the function and working principles of electrical contact, the material requirements for cathode-side contact layer in SOFC stacks are outlined. The current materials for the cathode-interconnect contact are thoroughly reviewed, including noble metals, conductive ceramics (e.g. perovskites and spinels), composites, and other more complex structures. Several potential directions for cathode-interconnect contact material research and development are also highlighted.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
J.H. Zhu, H. Ghezel-Ayagh,