A review on recent advances and trends in symmetrical electrodes for solid oxide cells

Zamudio‐García, Javier; Caizán‐Juanarena, Leire; Porras-Vázquez, José M.; Losilla, Enrique R.; Marrero-López, D.

doi:10.1016/j.jpowsour.2021.230852

Cited by 75 publications

(43 citation statements)

References 282 publications

(331 reference statements)

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“…Symmetric solid oxide cells (SSOCs) can, however, be realized when the cathode and anode are composed of the same material. [7][8][9] Thus, due to the simplied conguration, material and fabrication costs can be signicantly reduced. 10 Besides, in this case there is only one type of electrode-electrolyte interface, minimizing the risk of chemical and thermomechanical interfacial incompatibility.…”

Section: Introductionmentioning

confidence: 99%

Phase transition with in situ exsolution nanoparticles in the reduced Pr_0.5Ba_0.5Fe_0.8Ni_0.2O_3−δ electrode for symmetric solid oxide cells

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Phase transition with in situ exsolution nanoparticles in the reduced Pr_0.5Ba_0.5Fe_0.8Ni_0.2O_3−δ electrode for symmetric solid oxide cells

et al. 2022

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“…However, Ni-based anodes present mechanical stability issues upon redox cycling as well as carbon deposition and sulfur poisoning when hydrocarbon fuels are employed . An alternative cell configuration, known as symmetrical solid oxide cells (SSOCs), where the same electrode material is used as both air and fuel electrodes, has gained great attention in the last few years because of its simpler fabrication process and improved chemical and thermomechanical stability to operate in fuel cell and electrolysis modes . Nevertheless, the major challenge for the development of SSOCs is to find a suitable electrode with high electrocatalytic activity and adequate long-term stability in both oxidizing and reducing environments. , …”

Section: Introductionmentioning

confidence: 99%

LaCrO₃–CeO₂-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells

Zamudio‐García

Porras-Vázquez

Losilla

et al. 2022

ACS Appl. Energy Mater.

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La 0.98 Cr 0.75 Mn 0.25 O 3−δ –Ce 0.9 Gd 0.1 O 1.95 (LCM-CGO) nanocomposite layers with different LCM contents, between 40 and 60 wt %, are prepared in a single step by a spray-pyrolysis deposition method and evaluated as both air and fuel electrodes for solid oxide fuel cells (SOFCs). The formation of fluorite (CGO) and perovskite (LCM) phases in the nanocomposite electrode is confirmed by different structural and microstructural techniques. The intimate mixture of LCM and CGO phases inhibits the grain growth, retaining the nanoscale microstructure even after annealing at 1000 °C with a grain size lower than 50 nm for LCM-CGO compared to 200 nm for pure LCM. The synergetic effect of nanosized LCM and CGO by combining their high electronic and ionic conductivity, respectively, leads to efficient and durable symmetrical electrodes. The best electrochemical properties are found for 50 wt % LCM-CGO, showing polarization resistance values of 0.29 and 0.09 Ω cm 2 at 750 °C in air and H 2 , respectively, compared to 2.05 and 1.9 Ω cm 2 for a screen-printed electrode with the same composition. This outstanding performance is mainly ascribed to the nanoscale electrode microstructure formed directly on the electrolyte at a relatively low temperature. These results reveal that the combination of different immiscible phases with different crystal structures and electrochemical properties could be a promising strategy to design highly efficient and durable air and fuel electrodes for SOFCs.

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“…Here, one of the possible approaches consists in the design of SOFCs based on proton-conducting electrolytes (so-called protonic ceramic fuel cells or PCFCs), which offer desirable performance at reduced operational temperatures due to the high ionic conductivity as a result of proton transportation [ 21 , 22 , 23 , 24 ]. Despite the attractiveness of PCFCs, the selection of suitable electrode materials continues to be problematic due to the need to combine superior electrochemical performance with satisfactory compatibility [ 25 , 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Nickel-Containing Perovskites, PrNi0.4Fe0.6O3–δ and PrNi0.4Co0.6O3–δ, as Potential Electrodes for Protonic Ceramic Electrochemical Cells

et al. 2022

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Protonic ceramic fuel cells (PCFCs) offer a convenient means of converting chemical energy into electricity with high performance and efficiency at low- and intermediate-temperature ranges. However, in order to ensure good life-time stability of PCFCs, it is necessary to ensure rational chemical design in functional materials. Within the present work, we propose new Ni-based perovskite phases of PrNi0.4M0.6O3–δ (where M = Co, Fe) for potential utilization in protonic ceramic electrochemical cells. Along with their successful synthesis, functional properties of the PrNi0.4M0.6O3–δ materials, such as chemical compatibility with a number of oxygen-ionic and proton-conducting electrolytes, thermal expansion behavior, electrical conductivity, and electrochemical behavior, were comprehensively studied. According to the obtained data, the Co-containing nickelate exhibits excellent conductivity and polarization behavior; on the other hand, it demonstrates a high reactivity with all studied electrolytes along with elevated thermal expansion coefficients. Conversely, while the iron-based nickelate had superior chemical and thermal compatibility, its transport characteristics were 2–5 times worse. Although, PrNi0.4Co0.6O3–δ and PrNi0.4Fe0.6O3–δ represent some disadvantages, this work provides a promising pathway for further improvement of Ni-based perovskite electrodes.

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A review on recent advances and trends in symmetrical electrodes for solid oxide cells

Cited by 75 publications

References 282 publications

Phase transition with in situ exsolution nanoparticles in the reduced Pr_0.5Ba_0.5Fe_0.8Ni_0.2O_3−δ electrode for symmetric solid oxide cells

Phase transition with in situ exsolution nanoparticles in the reduced Pr_0.5Ba_0.5Fe_0.8Ni_0.2O_3−δ electrode for symmetric solid oxide cells

LaCrO₃–CeO₂-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells

Nickel-Containing Perovskites, PrNi0.4Fe0.6O3–δ and PrNi0.4Co0.6O3–δ, as Potential Electrodes for Protonic Ceramic Electrochemical Cells

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A review on recent advances and trends in symmetrical electrodes for solid oxide cells

Cited by 75 publications

References 282 publications

Phase transition with in situ exsolution nanoparticles in the reduced Pr0.5Ba0.5Fe0.8Ni0.2O3−δ electrode for symmetric solid oxide cells

Phase transition with in situ exsolution nanoparticles in the reduced Pr0.5Ba0.5Fe0.8Ni0.2O3−δ electrode for symmetric solid oxide cells

LaCrO3–CeO2-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells

Nickel-Containing Perovskites, PrNi0.4Fe0.6O3–δ and PrNi0.4Co0.6O3–δ, as Potential Electrodes for Protonic Ceramic Electrochemical Cells

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Phase transition with in situ exsolution nanoparticles in the reduced Pr_0.5Ba_0.5Fe_0.8Ni_0.2O_3−δ electrode for symmetric solid oxide cells

Phase transition with in situ exsolution nanoparticles in the reduced Pr_0.5Ba_0.5Fe_0.8Ni_0.2O_3−δ electrode for symmetric solid oxide cells

LaCrO₃–CeO₂-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells