1. Introduction
Considerable attention has been paid in recent years to the
commercialization and design of solid oxide fuel cell (SOFC)
because of its high electrical energy conversion efficiency, green
power generation, fuel flexibility, use of hydrocarbon fuels and
solid state compounds [1]. Among two types of cells, planar and
cylinder, the planar type SOFC has the advantage of a high
electrical power density, a low manufacturing cost and an easy
fabrication process against its counterpart [2–5]. Intermediate
temperature SOFC operating 500–700 1C has become one of the
main researches, because high operating temperature put numerous requirements on materials selection, limiting the commercial
applications of SOFC [6]. Planar type SOFC typically consists of
electrodes, electrolyte, interconnect and housing. And several
sealing procedures are required for SOFC between: ceramic cell