Infiltrated La_(0.4)Sr_(0.4)Fe_(0.03)Ni_(0.03)Ti_(0.94)O_3 based anodes for all ceramic and metal supported solid oxide fuel cells

摘要

AbstractFor improved robustness, durability and to avoid severe processing challenges alternatives to the Ni:YSZ composite electrode is highly desirable. The Ni:YSZ composite electrode is conventionally used for solid oxide fuel cell and solid oxide electrolysis cell. In the present study we report on high performing nanostructured Ni:CGO electrocatalyst coated A site deficient Lanthanum doped Strontium Titanate (La0.4Sr0.4Fe0.03Ni0.03Ti0.94O3) based anodes. The anodes were incorporated into the co-sintered DTU metal supported solid oxide fuel cell design and large sized 12 cm × 12 cm cells were fabricated. The titanate material showed good processing characteristics and surface wetting properties towards the Ni:CGO electrocatalyst coating. The cell performances were evaluated on single cell level (active area 16 cm2) and a power density at 0.7 V and 700 °C of 0.650 Wcm−2with a fuel utilization of 31% was achieved. Taking the temperature into account the performances of the studied anodes are among the best reported for redox stable and corrosion resistant alternatives to the conventional Ni:YSZ composite solid oxide cell electrode.Highlights•High performing redox tolerant and corrosion resistant MS-SOFC anodes were developed.•0.77 Wcm−2peak power density at 700 °C at a fuel utilization of 51% was obtained.•A site deficient LST perovskites show good MS-SOFC processing characteristics.•Ni:CGO infiltrated electrocatalyst coatings are stable on La0.4Sr0.4Ti0.94O3surfaces.