A composite cathode with undoped LaFeO3 for protonic ceramic fuel cells

Choi, Jae-Won; Kim, Baek; Song, Sang-Hyun; Park, Jong‐Sung

doi:10.1016/j.ijhydene.2016.03.115

Cited by 31 publications

(10 citation statements)

References 32 publications

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“…[19,20] In 2011, the LSCF6428−BaZr 0.5 Pr 0.3 Y 0.2 O 3 composite synthesized by a similar method was studied in detail by Fabbri et al [72] In the following years, a series of cathode materials, represented by La 0.7 Sr 0.3 FeO 3 −Ba(Ce 0.51 Zr 0.3 Y 0.15 Zn 0.04 )O 3 (composite of BaZr 0.1 Ce 0.8 Y 0.1 O 3 (BZCY181) and SSC), was reported in succession. [73,74] However, most composites prepared using the physical mixing method had some disadvantages, such as inhomogeneity, micro-sized phases, large thermal expansion coefficient, poor operational stability, and limited contact area of each phase.…”

Section: Critical Progress In the Development Of Materials For Pcfc C...mentioning

confidence: 99%

Advanced Cathode Materials for Protonic Ceramic Fuel Cells: Recent Progress and Future Perspectives

Wang

Tang

et al. 2022

Advanced Energy Materials

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Intermediate‐temperature proton ceramic fuel cells (PCFCs)–a promising power generation technology–have attracted significant attention in recent years because of their unique advantages over conventional high‐temperature solid oxide fuel cells and low‐temperature proton exchange membrane fuel cells. The cathodes of PCFCs simultaneously require efficient channels for proton, oxide‐ion, and electron transfer; therefore, designing and engineering cathode materials with tailorable H+, O2−, and e− conductivities are crucial for improving PCFC performance. Despite significant efforts and critical progress in this field, exploring the desired cathode materials remains challenging. This review provides a comprehensive and critical overview of oxide materials for PCFC cathodes, particularly triple H+/O2−/e− conductors. Their proton uptake, conduction mechanisms, and structure–property relationships are focused on to guide future material design. In addition, the electrochemical performance of these cathode materials in PCFCs is discussed and the electrochemical performance gaps among PCFCs with different types of cathode materials are defined. Finally, perspectives on the development of high‐performance PCFCs are proposed.

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Section: Critical Progress In the Development Of Materials For Pcfc C...mentioning

confidence: 99%

Advanced Cathode Materials for Protonic Ceramic Fuel Cells: Recent Progress and Future Perspectives

Wang

Tang

et al. 2022

Advanced Energy Materials

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“…The electrochemical performance of the perovskite can be improved radically by developing single-phase electrode materials with high catalytic activity. The La 1– x Sr x FeO 3−δ -based perovskite materials show great potential due to their excellent oxygen-ion conductivity. , Good ORR activity has been exhibited when La 1– x Sr x FeO 3−δ was used in oxygen electrodes, − while the materials were easily decomposed when applied in fuel electrodes. The structural stability in reducing atmosphere can be improved by high valence element doping. , In our previous study, La 0.3 Sr 0.7 Fe 0.9 Ti 0.1 O 3−δ (LSFTi 91) exhibited good structural stability and the smallest polarization resistance as a single-phase fuel electrode for SOECs .…”

Section: Introductionmentioning

confidence: 99%

Excellent Electrochemical Performance of La_0.3Sr_0.7Fe_0.9Ti_0.1O_3−δ as a Symmetric Electrode for Solid Oxide Cells

Hou

Wang

Bian

et al. 2021

ACS Appl. Mater. Interfaces

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Solid oxide cells (SOCs) can switch between fuel cell and electrolysis cell modes, which alleviate environmental and energy problems. In this study, the La0.3Sr0.7Fe0.9Ti0.1O3−δ (LSFTi 91) perovskite is innovatively used as a symmetric electrode for solid oxide electrolysis cells (SOECs) and solid oxide fuel cells (SOFCs). LSFTi 91 exhibits a pure perovskite phase in both oxidizing and reducing atmospheres, and the maximum conductivity in air and 5% H2/Ar is 150 and 1.1 S cm–1, respectively, which meets the requirement of the symmetric electrode. The polarization resistance (R p) at 1.5 V is as low as 0.09 Ω cm2 in the SOEC mode due to the excellent CO2 adsorption capacity. The current density can reach 1.9 A cm–2 at 1.5 V and 800 °C, which is the highest electrolytic performance in the reported single-phase electrodes. LSFTi 91 also exhibits eminent oxygen reduction reaction and hydrogen oxidation reaction (ORR and HOR) activities, with R p of 0.022 and 0.15 Ω cm2 in air and wet H2, respectively. The peak power density of SOFC could reach 847 mW cm–2 at 800 °C. In addition, good reversibility is confirmed in the cyclic operation of SOFC and SOEC.

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“…Higher power densities were observed for the proton-conducting cell, which were attributable to lower electrode polarisation and lower ohmic resistance of the electrolyte. A comparison of composite electrodes composed of the same H + -conducting phase with La 0.8 Sr 0.2 FeO 3−δ (LSF82) or undoped LaFeO 3 (LF) revealed similar performances, implying that the greater oxide-ion conductivity of the LSF82 phase had a minimal effect on the electrode performance [157]. This led the authors to suggest that the role of the hydroxyl ion may be critical in generating oxide ions and water.…”

Section: Composite Cathodesmentioning

confidence: 99%

Perspectives on Cathodes for Protonic Ceramic Fuel Cells

et al. 2021

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Protonic ceramic fuel cells (PCFCs) are promising electrochemical devices for the efficient and clean conversion of hydrogen and low hydrocarbons into electrical energy. Their intermediate operation temperature (500–800 °C) proffers advantages in terms of greater component compatibility, unnecessity of expensive noble metals for the electrocatalyst, and no dilution of the fuel electrode due to water formation. Nevertheless, the lower operating temperature, in comparison to classic solid oxide fuel cells, places significant demands on the cathode as the reaction kinetics are slower than those related to fuel oxidation in the anode or ion migration in the electrolyte. Cathode design and composition are therefore of crucial importance for the cell performance at low temperature. The different approaches that have been adopted for cathode materials research can be broadly classified into the categories of protonic–electronic conductors, oxide-ionic–electronic conductors, triple-conducting oxides, and composite electrodes composed of oxides from two of the other categories. Here, we review the relatively short history of PCFC cathode research, discussing trends, highlights, and recent progress. Current understanding of reaction mechanisms is also discussed.

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A composite cathode with undoped LaFeO3 for protonic ceramic fuel cells

Cited by 31 publications

References 32 publications

Advanced Cathode Materials for Protonic Ceramic Fuel Cells: Recent Progress and Future Perspectives

Advanced Cathode Materials for Protonic Ceramic Fuel Cells: Recent Progress and Future Perspectives

Excellent Electrochemical Performance of La_0.3Sr_0.7Fe_0.9Ti_0.1O_3−δ as a Symmetric Electrode for Solid Oxide Cells

Perspectives on Cathodes for Protonic Ceramic Fuel Cells

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A composite cathode with undoped LaFeO3 for protonic ceramic fuel cells

Cited by 31 publications

References 32 publications

Advanced Cathode Materials for Protonic Ceramic Fuel Cells: Recent Progress and Future Perspectives

Advanced Cathode Materials for Protonic Ceramic Fuel Cells: Recent Progress and Future Perspectives

Excellent Electrochemical Performance of La0.3Sr0.7Fe0.9Ti0.1O3−δ as a Symmetric Electrode for Solid Oxide Cells

Perspectives on Cathodes for Protonic Ceramic Fuel Cells

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Excellent Electrochemical Performance of La_0.3Sr_0.7Fe_0.9Ti_0.1O_3−δ as a Symmetric Electrode for Solid Oxide Cells