Co-firing of LSM-GDC/GDC/NiO-GDC with addition of nano-GDC powder

Abstract

Co-firing of a La0.8Sr0.2MnO3-δ (LSM)-gadolinium doped ceria(GDC)/GDC/NiO-GDC cell is investigated by the application of a mixed GDC powder. A fine starting GDC powder is synthesized by the homogeneous precipitation process, using hexamethylenetetramine (HMT), and mixed with a commercially available GDC powder. Shrinkage behavior of the chemically prepared, the commercial, and the mixed GDC powders is examined by thermo-mechanical analysis (TMA), which suggests that the mixed powder has good sinterability and compatible shrinkage with electrodes. A LSM-GDC/GDC/NiO-GDC cell prepared by lamination of electrode and electrolyte green sheets is co-fired at 1300°C for 4 h. The prepared fuel cell gives an output power density of 0.35 W/cm 2 at 600°C.

Application of dispenser printing for the preparation of a SOFC cathode with controlled microstructure

“…The laminated sheets were sintered at 1350 • C for 4 h. The fabrication procedure of each ceramic sheet is described in our previous paper. 25 The microtubular electrolyte/anode substrate was fabricated by multi-dip coating using GDC slurries and NiO-GDC slurries as shown in our report. 26 Dip-coated electrolyte/anode substrates were sintered under the same conditions with the planar substrates.…”

Application of a thin intermediate cathode layer prepared by inkjet printing for SOFCs

“…The fabrication procedure of each green sheet is described in our previous paper. 22 The thickness of the electrolyte and anode layers after heat treatment was around 50 and 600 m, respectively.…”

Fabrication and characterization of microtubular and flattened ribbed SOFCs prepared by the multi-dip coating and co-firing

“…The maximum power density was confirmed to be around 0.14 W/cm 2 at 550 • C, a value that is comparable to that of a flat SOFC disc with the same layer composition as previously reported by considering the electrolyte thickness. 11 The results of impedance analysis are shown in Fig. 7.…”

“…2,3 We have studied the co-sintering of a three-layered flat cell of LSM-GDC/GDC/NiO-GDC prepared by tape casting, since the reaction between samarium doped ceria and LSM was not observed. 10,11 Electrical performance of the prepared microtubular cell was measured and was compared with that of a flat disc type cell. Possible ways to improve future cell performance will be discussed.…”