Electrochemical performance of LSCF based thin film cathodes prepared by spray pyrolysis

Beckel, Daniel; Muecke, Ulrich P.; Gyger, Thomas; Florey, Guillaume; Infortuna, Anna; Gauckler, Ludwig J.

doi:10.1016/j.ssi.2007.01.019

Cited by 158 publications

(146 citation statements)

References 47 publications

Supporting

Mentioning

131

Contrasting

Unclassified

Order By: Relevance

“…Different methods have been used to prepare LSCF perovskite including Pechini [14][15][16], glycine nitrate combustion [17], solid state reaction [18], and spray pyrolysis [19]. The Pechini method, a solution technique, has been shown to produce high purity and homogeneous perovskite phase with high surface area at low synthesis temperature without intermediate grinding.…”

Section: Open Accessmentioning

confidence: 99%

La0.6Sr0.4Co0.2Fe0.8O3 Perovskite: A Stable Anode Catalyst for Direct Methane Solid Oxide Fuel Cells

Mirzababaei

Chuang

2014

Catalysts

View full text Add to dashboard Cite

Direct methane solid oxide fuel cells, operated by supplying methane to a Ni/YSZ anode, suffer from degradation via accumulation of carbon deposits on the Ni surface. Coating a 40 µm thin film of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) perovskite on the Ni/YSZ anode surface decreased the amount of carbon deposits, slowing down the degradation rate. The improvement in anode durability could be related to the oxidation activity of LSCF which facilitates oxidation of CH 4 and carbon deposits. Analysis of the crystalline structure of LSCF revealed that LSCF was stable in the reducing anode environment under H 2 and CH 4 flow at 750 °C and retained its perovskite structure throughout the 475 h long-term stability test.

show abstract

Section: Open Accessmentioning

confidence: 99%

La0.6Sr0.4Co0.2Fe0.8O3 Perovskite: A Stable Anode Catalyst for Direct Methane Solid Oxide Fuel Cells

Mirzababaei

Chuang

2014

Catalysts

View full text Add to dashboard Cite

show abstract

“…Although these reduction and oxidation mechanisms are not fully understood, it is generally accepted that the reactions follow different stages and involve more than one reaction path. Therefore, the reaction kinetics at the interphases strongly depends on chemical and structural properties of the cell components [6,[11][12][13], the electrode morphology (particle size, porosity, thickness, etc.) [14], the characteristics at the interfacial boundary [15,16] and other working parameters as the operation temperature and the gas partial pressure [17].…”

Section: The Role Of the Electrode/electrolyte Interphase In A Sofcmentioning

confidence: 99%

“…and Ba0.25La0.25Sr0.5Co0.8Fe0.2O3-δ cathodes on YSZ electrolytes and found that modifying the cathode composition or the microstructure the assembly showed a significant enhancement in performance [13]. The authors reported that reducing the grain size and introducing a dense layer between the porous cathode and the electrolyte were favorable structure modifications.…”

Section: The Effect Of Different Interphases and Micro-nanostructuresmentioning

confidence: 99%

Electrode/Electrolyte Interphase Characterization in Solid Oxide Fuel Cells

Soldati¹,

Baqué²,

Troiani³

et al. 2012

Hydrogen Energy - Challenges and Perspectives

View full text Add to dashboard Cite

“…Many perovskite oxides (e.g. SCFN and LSCF) have been studied and developed as the mixed ionic and electronic conductors (MIEC) that can provide the path for transferring both electrons and ions to improve the electrochemical performance of the IT-SOFCs cathode [7][8][9][10][11][12][13][14] . Moreover, recent studies have shown the potential of some perovskite related structures such as GdBaCo 2 O 5+δ and SmBaCo 2 O 5+x with layered and doubled structures, respectively, for operation at reduced temperatures due to their low activation energy.…”

Section: Research Objectives and Motivationmentioning

confidence: 99%

“…The presence of nanocrystalline interlayer is expected to enhance the exchange rate of oxygen between the gas-phase and the solid phases offering an extremely high surface area for oxygen reduction. The oxygen mass transport is expected be enhanced through the uniform nanostructure layer by rapid diffusion via enhanced grain boundaries of the nano-sized grains in the thin layer 14,72 .…”

Section: Effect Of Precursor Solution Concentrationmentioning

confidence: 99%

Microstructure Sensitive Design and Processing in Solid Oxide Electrolyzer Cell

Garmestani¹,

Herring²

2009

View full text Add to dashboard Cite

SUMMARYThe aim of this study was to develop an inexpensive manufacturing process for deposition of functionally graded thin films of LSM oxides with porosity graded microstructures for use as IT-SOFCs cathode. The spray pyrolysis method was chosen as a low-temperature processing technique for deposition of porous LSM films onto dense YSZ substrates. The effort was directed toward the optimization of the processing conditions for deposition of high quality LSM films with variety of morphologies in the range of dense to porous microstructures. Results of optimization studies of spray parameters revealed that the substrate surface temperature is the most critical parameter influencing the roughness and morphology, porosity, cracking and crystallinity of the film. Physical and chemical properties of deposited thin films such as porosity, morphology, phase crystallinity and compositional homogeneity have shown to be extensively dependent on the preparation conditions. Detailed analysis of the film formation mechanisms have been discussed in this work. It is suggested that using volatile metal-organic precursors as in CVD would alter the film formation mechanism to MOCVD process in which films of high quality can be processed. Novel electrode microstructures currently include a graded microstructure wherein the large pores are made close to the surface in outer layers for maximum mass transport into the electrode structure and smaller pores and particles close to the electrolyte interface would create maximum number of active reaction sites. Taking the advantage of simplicity of spray pyrolysis technique combined with using metal-organic compounds, the conventional ultrasonic spray system was upgraded to a novel system whereby highly crystalline multiMicrostructure Sensitive Design for Materials in Solid Oxide Electrolyzer Cell, Garmestani vi layered porosity graded LSM cathode with columnar morphology with good electrical conductivity in the range of 500-700 °C was fabricated through a multi-step spray and via optimizing spray parameters. This achievement for the current graded LSM cathode would allow its use in IT-SOFCs.Microstructure Sensitive Design for Materials in Solid Oxide Electrolyzer Cell, Garmestani 7

show abstract

Electrochemical performance of LSCF based thin film cathodes prepared by spray pyrolysis

Cited by 158 publications

References 47 publications

La0.6Sr0.4Co0.2Fe0.8O3 Perovskite: A Stable Anode Catalyst for Direct Methane Solid Oxide Fuel Cells

La0.6Sr0.4Co0.2Fe0.8O3 Perovskite: A Stable Anode Catalyst for Direct Methane Solid Oxide Fuel Cells

Electrode/Electrolyte Interphase Characterization in Solid Oxide Fuel Cells

Microstructure Sensitive Design and Processing in Solid Oxide Electrolyzer Cell

Contact Info

Product

Resources

About