2002 Volume 110 Issue 1282 Pages 591-596
Bi-layers consisting of porous La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) substrate and dense film of Ce0.9Gd0.1O1.95 (CGO) have been successfully fabricated using slurry-coating process. A CGO powder dispersed in acetone was deposited onto a pre-sintered LSCF (containing 50 mass% CGO) substrate, and then co-fired such that the thin electrolyte was fully densified and the substrate remains highly porous. Co-fired CGO film was well bonded to the substrate; crack- and pinhole-free, and exhibited very low ohmic resistance. The NO decomposition properties of electrode-supported type electrochemical cell, LSCF (substrate) |CGO (film)| LSCF (screen-printed) were investigated. A strong correlation between the structure of the working electrode and the NO decomposition characteristics were observed. By using electrode-supported thin electrolyte, the required electric power for NO decomposition could be remarkably reduced.
