Abstract
This chapter provides an overview of stack design and fabrication. Detailed description of design characteristics, gas manifolding, and fabrication processes, along with a summary of the technological status of each stack design, are presented. The design of a solid oxide fuel cell (SOFC) stack is governed by the restrictions imposed by the properties of the selected cell materials. The design also considers the required physical, chemical, electrical, and electrochemical characteristics of the cell components at the operating temperature. One important aspect in SOFC stack design is its fabricability. Any design requires appropriate ceramic fabrication and assembly methods to incorporate the cell materials into the stack configuration. The fabrication and assembly processes must ensure that no condition or environment in any process step destroys desired material characteristics of any of the components. Fabrication and assembly methodologies must attain the desired structural integrity, shape, electrical conductivity, and electrochemical performance in the stack. Currently, four common SOFC stack configurations have been proposed and fabricated: (1) the sealless tubular design, (2) the segmented-cell-in-series design, (3) the monolithic design, and (4) the flat-plate design.
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