연료극 지지체식 평관형 고체산화물 연료전지 단위 번들의 제조 및 성능

Abstract

KIER has been developing the anode-supported flat tubular solid oxidemediate temperature(700~800oC) operation. Anode-supported flat tubular cels have Ni/YSZ cermet anode support,8 m o l . % Y2O3 stabilized ZrO2(YSZ) thin electrolyte, and cathode multi-layer composed of Sr-doped LaSrMnO3(LSM), LSM-YSZ composite, and LaSrCoFeO3(LSCF). The prepared anode-supported flat tubular cell was joinedwith feritic stainless stel cap by induction brazing process. Curent colection for the cathode was achieved by wind-ing Ag wire and La0.6Sr0.4CoO3(LSCo) paste, while current colection for the anode was achieved by using Ni wireand felt. For making stack, the prepared anode-supported flat tubular cells with effective electrode area of 90 cm2connected in series with 12 unit bundles, in which unit bundle consists of two cels connected in parallel. The per-formance of unit bundle in 3% humidified H2 and air at 800oC shows maximum power density of 0.39 W/cm2 (@0.7V). Through these experiments, we obtained basic technology of the anode-supported flat tubular cell and estab-lished the proprietary concept of the anode-supported flat tubular cell unit bundle.