FORMATION OF GAS SEALING AND CURRENT COLLECTING LAYERS FOR HONEYCOMB-TYPE SOFCs

摘要

In this study, we report the effect of gas scaling layer on the electrical performances of a cathode-supporled honeycomb-type SOFC We have succeeded in preparing a gas sealing layer on the honeycomb edge face of the cathode-supported honeycomb SOFC by developing a stamp process. The prepared honeycomb SOFC was supported by LaSrMnO_3 (LSM) honeycomb monolith, and the channel surface was coated with electrolyte/anode bilayer through the use of a new slurry injection method. The electrolyte and anode layers on the channel surface have film thicknesses of about 20 mu m and about 10 mu m, respectively. The honeycomb SOFC with the gas sealing layer on the edge face exhibited open circuit voltage about 1 V under wet H_2 fuel flow, and can generate more than 2.3 times higher power density than the honeycomb SOFC without gas sealing layer.