Controlling cation migration and inter-diffusion across cathode/interlayer/electrolyte interfaces of solid oxide fuel cells: A review

Khan, Muhammad Zubair; Song, Rak‐Hyun; Mehran, Muhammad Taqi; Lee, Seung-Bok; Lim, Tak‐Hyoung

doi:10.1016/j.ceramint.2020.11.002

Cited by 78 publications

(25 citation statements)

References 281 publications

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“…An ideal cathode material for a SOFC must possess [ 27 , 28 , 29 , 30 , 31 , 32 , 33 ]: (a) high electronic ( n - or p -type) conductivity (in an oxidizing atmosphere, preferably, more than 10 2 S cm −1 ); (b) thermal and chemical compatibility with solid electrolytes and interconnectors; (c) enough large porosity to provide fast diffusion of gaseous oxygen through a cathode to a triple-phase cathode–solid electrolyte–gas phase interface; (d) high stability in an oxidizing atmosphere; (e) high catalytic activity in an oxygen reduction reaction (ORR); and (f) low cost.…”

Section: Cathode Materials For It–sofcs: Past Present and Futurementioning

confidence: 99%

Layered Oxygen-Deficient Double Perovskites as Promising Cathode Materials for Solid Oxide Fuel Cells

et al. 2021

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Development of new functional materials with improved characteristics for solid oxide fuel cells (SOFCs) and solid oxide electrolysis cells (SOECs) is one of the most important tasks of modern materials science. High electrocatalytic activity in oxygen reduction reactions (ORR), chemical and thermomechanical compatibility with solid electrolytes, as well as stability at elevated temperatures are the most important requirements for cathode materials utilized in SOFCs. Layered oxygen-deficient double perovskites possess the complex of the above-mentioned properties, being one of the most promising cathode materials operating at intermediate temperatures. The present review summarizes the data available in the literature concerning crystal structure, thermal, electrotransport-related, and other functional properties (including electrochemical performance in ORR) of these materials. The main emphasis is placed on the state-of-art approaches toimproving the functional characteristics of these complex oxides.

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Section: Cathode Materials For It–sofcs: Past Present and Futurementioning

confidence: 99%

Layered Oxygen-Deficient Double Perovskites as Promising Cathode Materials for Solid Oxide Fuel Cells

et al. 2021

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“…cobaltite-based perovskite electrode materials tend to react with YSZ electrolyte and results in the formation of insulating phases such as La 2 Zr 2 O 7 (LZO) and/or SrZrO 3 (SZO) [48]. Therefore, GDC or SDC interlayers are practically being used in the SOFCs to avoid the undesirable interaction between the cathode and electrolyte [48][49][50][51]. Numerous studies revealed that the GDC or SDC interlayer enhances the electrochemical performance of the SOFC owing to higher ionic conductivity [52].…”

Section: Cathode Materialsmentioning

confidence: 99%

Flat-tubular solid oxide fuel cells and stacks: a review

Khan

Iltaf

Ishfaq

et al. 2021

Journal of Asian Ceramic Societies

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Solid oxide fuel cells (SOFCs) offer numerous advantages in terms of high efficiency and clean electrochemcial energy conversion devices. However, owing to high operation temperature, this technology is restricted to stationary applications and leads to components degradation and long-term stability issues. The development of new design and their modifications for improving the electrochemical performance at intermediate temperatures and durability of the SOFC components are very important to bring this technology one step closer to the market. In this context, the current research on the development, properties, performance, and stability of geometrically modified flat-tubular (FT) SOFC cell and the stack is reviewed in detail. This advanced design exhibits higher performance compared to the tubular type and longer stability in comparison to the planar type SOFCs. The application of the interconnect material is emerging as the key factor influencing the electrical output of the FT-SOFC and operation at high temperatures and current density are the critical issues for cell durability. New stack designs are discussed in detail and experimental findings are summarized.

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“…Barrier layers are widely used in the technology of solid oxide fuel cells (SOFCs) to prevent the interaction of the individual functional layers of SOFCs, to protect electrode layers from phase decomposition and poisoning, and to increase the SOFC energy efficiency by blocking the electron current in devices with electrolyte membranes possessing mixed conductivity (MIECs) [ 1 , 2 , 3 , 4 , 5 ]. Prospective cathode materials with high mixed electronic–ionic conductivity with a perovskite or perovskite-like structure, such as lanthanum–strontium manganites and cobaltite–ferrites, layered nickelates of rare earth metals (La, Pr, or Nd), and various double perovskites are incompatible with conventional electrolyte materials based on ZrO 2 or LaGaO 3 due to the diffusion of cations and the resulting chemical interaction at the electrode–electrolyte interface which causes an increase in polarization resistance and can also lead to the delamination of the cathode layer [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic Deposition and Characterization of the Doped BaCeO3 Barrier Layers on a Supporting Ce0.8Sm0.2O1.9 Solid-State Electrolyte

2022

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In this study, the technology of electrophoretic deposition (EPD) micrometer barrier layers based on a BaCe0.8Sm0.19Cu0.1O3 (BCSCuO) protonic conductor on dense carrying Ce0.8Sm0.2O1.9 (SDC) solid-state electrolyte substrates is developed. Methods for creating conductive sublayers on non-conductive SDC substrates under EPD conditions, such as the synthesis of a conductive polypyrrole (PPy) layer and deposition of a layer of finely dispersed platinum from a suspension of its powder in isopropanol, are proposed. The kinetics of disaggregation, disperse composition, electrokinetic potential, and the effect of adding iodine to the BCSCuO suspension on these parameters as factors determining the preparation of stable suspensions and successful EPD processes are explored. Button cells based on a carrying SDC electrolyte of 550 μm in thickness with BCSCuO layers (8–35 μm) on the anode, cathode, and anode/cathode side, and Pt electrodes are electrochemically tested. It was found that the effect of blocking the electronic current in the SDC substrate under OCV conditions was maximal for the cells with barrier layers deposited on the anode side. The technology developed in this study can be used to fabricate solid oxide fuel cells with doped CeO2 electrolyte membranes characterized by mixed ionic–electronic conductivity (MIEC) under reducing atmospheres.

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Controlling cation migration and inter-diffusion across cathode/interlayer/electrolyte interfaces of solid oxide fuel cells: A review

Cited by 78 publications

References 281 publications

Layered Oxygen-Deficient Double Perovskites as Promising Cathode Materials for Solid Oxide Fuel Cells

Layered Oxygen-Deficient Double Perovskites as Promising Cathode Materials for Solid Oxide Fuel Cells

Flat-tubular solid oxide fuel cells and stacks: a review

Electrophoretic Deposition and Characterization of the Doped BaCeO3 Barrier Layers on a Supporting Ce0.8Sm0.2O1.9 Solid-State Electrolyte

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