A Performance Study of Solid Oxide Fuel Cells With BaZr_0.1Ce_0.7Y_0.2O_3–δ Electrolyte Developed by Spray‐Modified Pressing Method

Abstract

Fuel cells with BaZr0.1Ce0.7Y0.2O3–δ (BZCY) proton‐conducting electrolyte is fabricated using spray‐modified pressing method. In the present study the spray‐modified pressing technology is developed to prepare thin electrolyte layers on porous Ni‐BZCY anode supports. SEM data show the BZCY electrolyte film is uniform and dense, well‐bonded with the anode substrate. An anode‐supported fuel cell with BZCY electrolyte and Ba0.5Sr0.5Co0.8Fe0.2O3–δ (BSCF) cathode is characterized from 600 to 700 °C using hydrogen as fuel and ambient air as oxidant. Maximum power density of 536 mW cm–2 along with a 1.01 V OCV at 700 °C is obtained. Impedance spectra show that Ohmic resistances contribute minor parts to the total ones, for instance, only ~23% when operating at 600 °C. The results demonstrate that spray‐modified pressing technology offers a simple and effective way to fabricate quality electrolyte film suitable to operate in intermediate temperature.

Tailoring cations in a perovskite cathode for proton-conducting solid oxide fuel cells with high performance

“…Despite the fact that making direct comparisons for SOFC tests is difficult due to the variability of many parameters, the cell using a BKSCF cathode, as reported in this study, showed a much larger power output than most of H-SOFCs using a BSCF-based cathode reported previously, 18,24,[55][56][57][58][59] which suggests that K-doping into BSCF can enhance the cathode catalytic activity, thus allowing a fuel cell performance improvement. The only exception is reported by An et al 60 In their study, proton-conducting SOFCs using single-phase BSCF cathode were fabricated.…”

Synergistic Coupling of Proton Conductors BaZr0.1Ce0.7Y0.1Yb0.1O3−δ and La2Ce2O7 to Create Chemical Stable, Interface Active Electrolyte for Steam Electrolysis Cells

“…To increase the packing density of the electrolyte layer for an improved sinterability, after dried at 120 °C for 30 min, the cathode/electrolyte assemblies were pressed to 300 MPa. 26 The green pellets were heated to 250 °C at a 2 °C/min ramp and held for 2 h to burn out the flour slowly in a box furnace in stagnant air. A 2 g BZCYYb dense pellet as weight was placed over each sample to prevent warping during sintering.…”

“…Afterward, these pellets were spin-coated with two cycles of BZCYYb electrolyte slurry only, or one cycle BZCYYb slurry then one cycle of LCO slurry, or two cycles of LCO slurry only, yielding three kinds of cells different in electrolyte configuration. To increase the packing density of the electrolyte layer for an improved sinterability, after dried at 120 °C for 30 min, the cathode/electrolyte assemblies were pressed to 300 MPa . The green pellets were heated to 250 °C at a 2 °C/min ramp and held for 2 h to burn out the flour slowly in a box furnace in stagnant air.…”

New mechanistic insight into the oxygen reduction reaction on Ruddlesden–Popper cathodes for intermediate-temperature solid oxide fuel cells

“…Recently, we have invented a versatile spray-modified pressing method to produce thin layers in the (BaZr)(CeY)O 3Àd proton electrolyte study. 43 Here, by taking advantage of this method, well-defined LSNO cathodes with a fixed surface area and appropriate thickness are produced. Based on such a highly credible configuration, the surface ORR is evaluated; governing factors are identified and the underlying surface reaction mechanism, particularly with respect to the interstitial oxygen, for the R-P phase are extensively discussed.…”