Synthesis, characterization and thermal expansion of Ce0.8–xSm0.2ZrxO2-δ Solid electrolytes for IT-SOFC applications

Venkataramana, Kasarapu; Madhusudan, Ch.; Madhuri, Chittimadula; Reddy, C. Vishnuvardhan

doi:10.1016/j.matpr.2016.11.048

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Hence, ceria mechanical strength can be slightly improved with the addition of rare-earth oxides because an increase in oxygen vacancies contributes to weaken the binding energy which results in the increase in thermal expansion coefficient (TEC) [34]. Therefore, the TEC of constituent components of an SOFC must match to prevent cracking during thermal cycling and thus lead to more stability of the FC in transient operation [35,36]. synthesized with co-precipitation method for LT-SOFCs.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and thermal characterization of doped ceria electrolyte with lanthanum and zirconium

Rafique

Raza

Arifin

et al. 2018

Ceramics International

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Section: Introductionmentioning

confidence: 99%

Electrochemical and thermal characterization of doped ceria electrolyte with lanthanum and zirconium

Rafique

Raza

Arifin

et al. 2018

Ceramics International

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“…Dopants can improved the ionic conductivity of ceria by increase the oxygen vacancies and distort the resultant crystal structure. Rare earth elements such as Nd, Sm, and Gd are commonly selected as dopants in ceria [7]. Furthermore, as SOFC operates at high temperature, the mechanical properties of the electrolyte also important.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Sm/Zr Co-Doped CeO<sub>2</sub> Ceramic for Solid Electrolyte Application

Abdullah

Soong²,

Yusoff

et al. 2022

KEM

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In this paper, we report the properties of Sm and Zr co-doped CeO2 ceramic, which synthesized by conventional solid state reaction. Sm content in Ce site was fixed at 20 mol%, meanwhile Zr was varied in the range of 5 to 15 mol%. All samples was pressed under 26 MPa before sintered at 1400 °C for 5 hours. The X-ray diffraction patterns of samples confirm all the samples are in single-phase with cubic fluorite structure. The lattice parameter decreases with increase in Zr concentration. The relative density of all samples was more that 95%. The microhardness achieved highest value for sample with 0.05 mol% of Zr. The shrinkage and the change of bulk density shows direct correlation.

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“…Cerium oxide exhibits the property of releasing and incorporating oxygen [30][31]. When aliovalent ions (divalent or tetravalent cations) are doped into ceria lattice, it may create oxygen vacancies by charge compensation mechanism, further improving oxygen storage capacity and catalytic property of ceria [32][33][34]. In this research, Zr and Sm were co-doped into ceria lattice and NiO -Ce0.8-xSm0.2ZrxO2-δ (NiO:Ce0.8-xSm0.2ZrxO2-δ = 50%:50% in weight; x=0, 0.05, 0.10, 0.15, and 0.20, or simply denoted as NiO-ZrxSDC) as anode materials were systematically studied.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Thin-Film SOFC Supported by Microchannel-Structured Zirconia Substrate for Direct Methane Operation

Lee

Gan

Yang

et al. 2021

Int. J. Petrol. Technol.

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Ni-cermet anode demonstrates excellent catalytic activity and electrical conductivity but suffers from carbon deposition issue. To utilize Ni-cermet anode while preventing carbon deposition, a synergic strategy is employed to design anode electrode. In particular, Zr is incorporated into Ce0.8Sm0.2O2-δ lattice to tailor oxygen storage and catalytic properties of Ni-Ce0.8-xSm0.2ZrxO2-δ anode for improving electrochemical oxidizations of various fuel species. An inert thick YSZ microtubular substrate with radially well-aligned microchannels open at the inner surface is used to support multi thin functional layers of solid oxide cell, i.e., Ni current collector, Ni-Ce0.8-xSm0.2ZrxO2-δ anode, YSZ/SDC electrolyte, and LSCF cathode. The thick YSZ substrate is able to inhibit the ratio of fuel to product gases in the thin anode functional layer, which favors the prevention of carbon buildup in the thin anode layer when synergistically combined with Ni-Ce0.8-xSm0.2ZrxO2-δ anode material. The microchannels embedded in the YSZ substrate can also avoid too much dilutions of the fuel in the anode functional layer. The cell is fabricated and tested with both hydrogen and methane as the fuel. A short-term test is conducted with methane as fuel and good stability is obtained. The fundamental mechanisms for the prevention of carbon buildup in anode functional layer are also discussed.

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Synthesis, characterization and thermal expansion of Ce0.8–xSm0.2ZrxO2-δ Solid electrolytes for IT-SOFC applications

Cited by 6 publications

References 22 publications

Electrochemical and thermal characterization of doped ceria electrolyte with lanthanum and zirconium

Electrochemical and thermal characterization of doped ceria electrolyte with lanthanum and zirconium

Synthesis and Characterization of Sm/Zr Co-Doped CeO<sub>2</sub> Ceramic for Solid Electrolyte Application

Fabrication and Characterization of Thin-Film SOFC Supported by Microchannel-Structured Zirconia Substrate for Direct Methane Operation

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