A review on cathode materials for conventional and proton-conducting solid oxide fuel cells

Tahir, Nur Nadhihah Mohd; Baharuddin, Nurul Akidah; Osman, Nafisah; Somalu, Mahendra Rao

doi:10.1016/j.jallcom.2021.162458

Cited by 69 publications

(33 citation statements)

References 122 publications

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“…A schematic diagram of the oxygen reduction pathway for LSCF cathode all over the bulk and surface using A, oxide ion conductor and B, proton conductor as electrolyte materials. The schematic was reprinted from Tahir et al 45 with permission. Copyright 2021 Journal of Alloys and Compounds…”

Section: Orr On Miec Cathodesmentioning

confidence: 99%

“…As a result, the pathways of oxides ions (O ad ) transportation to TPB are shortened because the reaction sites are extended to a larger area. 45 To investigate the mechanism of ORR at mixed conducting oxygen electrodes, Adler et al 46 has built a continuum model. The study is consistent with the reaction mechanism for the oxygen reduction pathway for LSCF cathode that was proposed by Uchida et al 47 as presented in Table 1.…”

Section: Orr On Miec Cathodesmentioning

confidence: 99%

“…On the other hand, protons (H + ) travel from the electrolyte to the cathode bulk because the MIEC cathode material allows proton conduction. As a result, the pathways of oxides ions ( O ad ) transportation to TPB are shortened because the reaction sites are extended to a larger area 45 …”

Section: Orr On Miec Cathodesmentioning

confidence: 99%

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Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La _1−x Sr _x Co _1−y Fe _y O ₃₋ _δ materials

Safian

Malek

Jamil

et al. 2022

Intl J of Energy Research

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Summary High‐temperature solid oxide fuel cells (HT‐SOFCs) generally operate at 800°C to 1000°C and intermediate temperature SOFCs (IT‐SOFCs) at 600°C to 800°C. Reducing the SOFCs operational from high to ITs results in many issues mainly at the cathode site. One of the shortcomings that have been addressed is high polarization losses associated with oxygen reduction reaction (ORR) and degradation of La1−xSrxCo1−yFeyO3−δ (LSCF) cathode materials. Strontium (Sr) has been discovered to segregate and inhibit the surface‐active site for the ORR under specified conditions (temperature, relative humidity, and suppressing activity). It enriched the surface, formed Sr‐rich secondary phases, and eventually changes the composition and the structure of the perovskite surfaces. Therefore, this review aims to summarize the occurrences of Sr segregation at the LSCF cathode surfaces as a function of operating conditions and their effects on the material performance. In addition, the characterization techniques utilized to investigate the Sr segregation, and strategies for Sr segregation mitigation are also discussed.

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Section: Orr On Miec Cathodesmentioning

confidence: 99%

Section: Orr On Miec Cathodesmentioning

confidence: 99%

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Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La _1−x Sr _x Co _1−y Fe _y O ₃₋ _δ materials

Safian

Malek

Jamil

et al. 2022

Intl J of Energy Research

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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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“…In SOFC power generation systems, one method of saving costs is to reduce the operating temperature. However, as the operating temperature decreases, the electrochemical performance of the SOFC also decreases, which is mainly due to the increase in the polarization resistance of the electrodes and the decrease in the conductivity of the electrolyte [17].…”

Section: Introductionmentioning

confidence: 99%

YSZ/LSM Composite Cathode Deposited by Solution Precursor Plasma Spraying

et al. 2022

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In this paper, solution precursor plasma spraying (SPPS) was employed to prepare a porous YSZ/LSM composite cathode for solid oxide fuel cell (SOFC). The surface morphology and microstructure of the composite cathode deposits were characterized using SEM. The effect of annealing treatment on SPPS YSZ/LSM microstructure was examined. The results showed that the as-sprayed YSZ/LSM deposits presented a porous aggregate with a size range of 10–60 μm when the alcohol was used as the solvent and the spraying distance was 60 mm. The porous aggregate was found to be composed mainly of small particles ranging from 0.2–2 μm, the YSZ/LSM composite cathode showed a finely porous microstructure with grain sizes from micrometers to sub-micrometers. A further annealing treatment at 1050 °C for 2 h in air resulted in a continuous microstructure porous coating with a perovskite phase. The polarization test results demonstrated that the minimum polarizations were 1.26 and 0.083 Ω·cm2 for the composite cathode at 800 and 1000 °C, respectively.

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A review on cathode materials for conventional and proton-conducting solid oxide fuel cells

Cited by 69 publications

References 122 publications

Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La _1−x Sr _x Co _1−y Fe _y O ₃₋ _δ materials

Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La _1−x Sr _x Co _1−y Fe _y O ₃₋ _δ materials

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

YSZ/LSM Composite Cathode Deposited by Solution Precursor Plasma Spraying

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A review on cathode materials for conventional and proton-conducting solid oxide fuel cells

Cited by 69 publications

References 122 publications

Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La 1−x Sr x Co 1−y Fe y O 3− δ materials

Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La 1−x Sr x Co 1−y Fe y O 3− δ materials

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

YSZ/LSM Composite Cathode Deposited by Solution Precursor Plasma Spraying

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Product

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Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La _1−x Sr _x Co _1−y Fe _y O ₃₋ _δ materials

Study on the surface segregation of mixed ionic‐electronic conductor lanthanum‐based perovskite oxide La _1−x Sr _x Co _1−y Fe _y O ₃₋ _δ materials