Tailoring the electrode-electrolyte interface of Solid Oxide Fuel Cells (SOFC) by laser micro-patterning to improve their electrochemical performance

Cebollero, Jose Antonio; Lahoz, Ruth; Laguna‐Bercero, M. A.; Larrea, Á.

doi:10.1016/j.jpowsour.2017.05.106

Cited by 66 publications

(45 citation statements)

References 42 publications

(46 reference statements)

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“…The nominal power is 2 W and the minimum pulse width 5 ns. Additional details of the equipment used and the experimental set up can be found in references [17] and [24].…”

Section: Methodsmentioning

confidence: 99%

“…In order to exceed the positive results found in our previous work [17], the objective of this study is to further improve the performance of the cells by maximizing the contact surface area at the electrode/ electrolyte interface. For this purpose, hexagonal array patterns have been engraved by pulsed laser machining on YSZ plates and subsequently YSZ-LSM composite cathodes have been deposited on them.…”

Section: Introductionmentioning

confidence: 94%

“…Note that those estimations were performed for high current densities and they could differ from those near open circuit voltage (OCV) conditions. Thus, surface engraving opens a new research area for SOFC development and in fact it has attracted several groups in recent years [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…In a very recent work, we have developed a different approach in order to enlarge the electrode-electrolyte interface in the mesoscale range (about 10 to 100 μm) by laser micro-patterning [17]. The beam of a 5 ns pulsed laser was used to engrave YSZ supports using a square array with a lattice parameter of 28 μm and depths of about 7 μm, obtaining a decrease of the cathodic polarization resistance of about 30% with respect to non-processed cells.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of laser-patterned YSZ-LSM composite cathode-electrolyte interfaces for solid oxide fuel cells

Cebollero

Laguna‐Bercero

Lahoz³

et al. 2019

Journal of the European Ceramic Society

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A B S T R A C TPatterned cathode/electrolyte interfaces formed by a hexagonal array of ∼22 μm deep wells with 24 μm lattice parameter have been prepared by pulsed laser machining to enlarge the contact surface and, consequently, to reduce the cathode polarization of Solid Oxide Fuel Cells. These new interfaces have been tested in YSZ-LSM/ YSZ/YSZ-LSM symmetrical cells, where the cathode is deposited by dip-coating. Appropriate ceramic suspensions have been formulated to penetrate into deep wells without presenting interfacial delamination after sintering. We analyse their applicability by comparing their rheology with the microstructure and electrochemical performance of the cells. The activation component of the polarization resistance is reduced by ∼50% using ethanol-based suspensions with 20 wt% solids loading, although the gas diffusion component increases due to excessive densification. Alternative ceramic suspensions with 17.5 wt% solids loading provide optimum electrode gas diffusion but lower activation components, resulting in an overall decrease of ∼20% in polarization resistance.

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“…The nominal power is 2 W and the minimum pulse width 5 ns. Additional details of the equipment used and the experimental set up can be found in references [17] and [24].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of laser-patterned YSZ-LSM composite cathode-electrolyte interfaces for solid oxide fuel cells

Cebollero

Laguna‐Bercero

Lahoz³

et al. 2019

Journal of the European Ceramic Society

Self Cite

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“…[21][22][23][24][25][26][27][28] Because the structure of TBC is similar to that of corrugated SOFC, the analysis method of interfacial crack for corrugated TBC can be used for reference. In addition, the research on corrugated SOFC mainly concentrates on its electrochemical performance, 9,10,[29][30][31] and the corresponding mechanical analysis is rare. 32 Therefore, based on the materials of electrolyte, anode, and cathode of cell, which are yttriastabilization zirconia (YSZ), Ni-YSZ, and LSM, respectively, the stresses distributions of planar and corrugated SOFCs are simulated during cooling process in this research.…”

Section: Introductionmentioning

confidence: 99%

Crack propagation of planar and corrugated solid oxide fuel cells during cooling process

2019

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Summary The corrugated solid oxide fuel cell (SOFC) can effectively improve energy density and transformation efficiency compared with conventional planar SOFC, but its stability and durability have not been systematically analyzed. The residual stress of SOFC may lead to crack initiation and propagation during cooling process, so stress distributions of planar and corrugated SOFCs are simulated to analyze the location of crack initiation. The materials of electrolyte, anode, and cathode in this paper are yttria‐stabilization zirconia (YSZ), Ni‐YSZ, and strontium‐doped lanthanum manganite (LSM), respectively. The result shows that the edge of cell is more prone to cracking. Therefore, precracks including edge crack and middle crack are introduced into anode‐electrolyte interfaces to investigate crack propagation of two types of SOFCs during cooling process. For corrugated SOFC, the cracks propagate more slowly, and the cell is less prone to interfacial delamination compared with planar SOFC. In addition, the interface energy release rates are obtained to further analyze crack propagation of two types of SOFCs, and the corrugated SOFC has lower energy release rate. The research in this paper provides guidance for stability analysis and lays a foundation for future mechanical analysis of corrugated SOFC.

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Manipulating and Optimizing the Hierarchically Porous Electrode Structures for Rapid Mass Transport in Solid Oxide Cells

Hou

Pan

et al. 2022

Adv Funct Materials

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Over the past decades, considerable efforts have been made to develop hierarchically porous electrodes for the high surface area, the fast velocity of fuels/products to/away from the reaction site, and the high loading of thermal-and/or electrochemical-catalysts. Manipulation of the hierarchical structure is one of the key steps for high performance in applications of efficient energy storage and conversion such as solid oxide cells. This review starts with a brief introduction to the basic concept of mass transport and how mass transport may affect performance. Then, the latest developments in enhancing the performance of cells through modification or optimization of the hierarchically porous electrode structures, including altering the geometry or morphology and increasing the triple-phase boundaries length of electrodes are summarized. Subsequently, the unique characteristics of microstructures that are critical to enhancing electrode performance and provide important insights into the mechanisms of performance (activity and durability) enhancement, aiming at achieving the rational design of better electrode architecture are highlighted. Finally, the remaining challenges for the knowledge-based design of highly efficient electrodes for electrochemical devices, together with possible directions and future perspectives for the development of highly efficient electrodes through optimization of microstructure are discussed.

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Tailoring the electrode-electrolyte interface of Solid Oxide Fuel Cells (SOFC) by laser micro-patterning to improve their electrochemical performance

Cited by 66 publications

References 42 publications

Optimization of laser-patterned YSZ-LSM composite cathode-electrolyte interfaces for solid oxide fuel cells

Optimization of laser-patterned YSZ-LSM composite cathode-electrolyte interfaces for solid oxide fuel cells

Crack propagation of planar and corrugated solid oxide fuel cells during cooling process

Manipulating and Optimizing the Hierarchically Porous Electrode Structures for Rapid Mass Transport in Solid Oxide Cells

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