Enhancing Effect on Densification and Thermal Expansion Compatibility for La0.8Sr0.2Cr0.9Ti0.1 O 3-Based SOFC Interconnect with B-Site Doping

Abstract

The air-sintering characteristics and thermal expansion behaviors in the and and and Ni; systems have been investigated as an interconnect material in high-temperature solid oxide fuel cells (SOFCs). With the exception of all samples showed a single perovskite phase with the hexagonal symmetry. contained a very small amount of The V, Co, and Ni doping in the -based perovskite enhanced their air-sintering characteristics, and in particular, the V-doped samples with a V content of reached ⩾90% relative density after treatment at 1600°C for 20 h. It was found that the V doping in the perovskites had a tendency to decrease an isothermal expansion under a atmosphere. Thus, perovskites is a promising candidate for interconnect in high-temperature solid oxide fuel cells. © 2002 The Electrochemical Society. All rights reserved.