Effects of the Addition of SDC on the Performance of a LSCN Anode

Abstract

Abstract50 wt.‐% of Ce0.8Sm0.2O2 (SDC) is added to La0.85Sr0.15Cr0.9 Ni0.1O3 (LSCN) to investigate its use as an alternative anode for solid oxide fuel cells, especially for hydrocarbon fuels. When LSCN is mixed and sintered together with SDC or YSZ at 1,500 °C for 12 h, no obvious second phase is observed from the XRD patterns. Although the conductivity of LSCN‐SDC is lower than LSCN, the polarization overpotential is reduced by a factor of 10. The mixed electronic‐ionic conductivity of SDC enlarges the reaction zone and improves the catalytic activity of the anode. The interface bonding between LSCN and the YSZ electrolyte is also modified by the nanometer SDC. An improved output performance on a self supported SOFC (LSCN‐SDC/YSZ/PSM‐YSZ) is obtained with H2 fuel compared with CH4 fuel.

Robust ion-transporting ceramic membrane with an internal short circuit for oxygen production

“…Fig.3adisplays the XRD pattern of the Sm 0.2 Ce 0.8 O 1.9 (SDC) powder sample with the characteristic peaks at the respective 2q angles of 28 (111), 33 (200), 47 (220), 52 (311), 58 (222) and 76 (331) which are closely matching the reported uorite structure 36,37. Sintering at higher temperature (1350 C) increased crystallization, as evidenced by the change in the diffraction pattern with more intense peaks but reduced width…”

Novel CO2-tolerant ion-transporting ceramic membranes with an external short circuit for oxygen separation at intermediate temperatures

“…The characteristic peak locations at the respective 2q angles of 28 (111), 33 (200), 47 (220), 52 (311), 58 (222) and 76 (331) are closely matching the reported fluorite structure. 37 To synthesize the SDC membrane, the as-obtained oxide powder was hydraulically pressed into disk-shape membranes and subsequently sintered at 1500 C to achieve the required densification with good mechanical strength and gas-tightness. The sintered SDC membranes have a diameter of 12 mm and the thickness ranged from 0.4 to 1.0 mm.…”

Catalytic surface promotion of highly active La0.85Sr0.15Cr0.8Ni0.2O3−δ anodes for La5.6WO11.4−δ based proton conducting fuel cells

“…[11] Previous studies on Ni doped La 0.85 Sr 0.15 CrO 3-δ anodes show good results in both conventional SOFCs and PC-SOFCs, since they combine sufficient electronic, oxygen-ion and protonic conductivity under anode operation conditions, together with catalytic activity due to the incorporation of nickel. [11][12][13][14] After the reduction, the material splits the structural Ni, which acts as catalyst for H 2 bond breaking and steam reforming of natural gas. [15,16] Its compatibility with LWO (both chromite phase and metallic Ni particles) makes it a promising candidate as anode for LWO based PC-SOFC.…”

“…[15,16] Its compatibility with LWO (both chromite phase and metallic Ni particles) makes it a promising candidate as anode for LWO based PC-SOFC. [11,14] The phase composition of the different materials was characterized by X-ray diffraction (XRD) by a PANalytical Cubix diffractometer, using CuKα 1,2 radiation and a X'Celerator detector in Bragg-Brentano geometry. XRD patterns were recorded in the 2θ range from 10º to 90º and analyzed using X'Pert Highscore Plus software.…”