Structural, morphological, and electrical properties of doped ceria as a solid electrolyte for intermediate-temperature solid oxide fuel cells

Stojmenović, Marija; Žunić, M.; Gulicovski, Jelena; Bajuk–Bogdanović, Danica; Holclajtner-Antunović, Ivanka; Dodevski, Vladimir; Mentus, Slavko

doi:10.1007/s10853-015-8943-y

Cited by 28 publications

(55 citation statements)

References 56 publications

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“…With application of very well developed electrochemical impedance spectroscopy method for studying the electrical properties of solid electrolytes [17,19,21,23,31,[63][64][65][66], beside the total electrical conductivity, it is possible to get the information about the separate contribution of bulk and grain boundary resistance. Additionally, it is possible to get the information about the electrochemical processes at the electrolyte/metal boundaries.…”

Section: Electrical Properties Of Sintered Samples Cementioning

confidence: 99%

Structural, morphological and electrical properties of Ce1−Ru O2−δ (x=0.005–0.02) solid solutions

Stojmenović

Žunić

Gulicovski

et al. 2016

Ceramics International

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Section: Electrical Properties Of Sintered Samples Cementioning

confidence: 99%

Structural, morphological and electrical properties of Ce1−Ru O2−δ (x=0.005–0.02) solid solutions

Stojmenović

Žunić

Gulicovski

et al. 2016

Ceramics International

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“…[49][50][51][52][53][54] Both E A values are rather similar, which suggests a similar charge transport mechanism. E A was found to be 0.79 eV for GTO and 0.88 eV for GTO and HTO respectively, which is in a typical range for oxygen ion conduction.…”

Section: Dielectric Propertiesmentioning

confidence: 73%

Anti-site disorder and physical properties in microwave synthesized RE₂Ti₂O₇ (RE = Gd, Ho) pyrochlores

et al. 2015

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In this work we report on the microwave assisted synthesis of nano-sized Gd 2 Ti 2 O 7 (GTO) and Ho 2 Ti 2 O 7 (HTO) powders from the RE 2 Ti 2 O 7 pyrochlore family (RE = rare earth). Synchrotron X-ray powder diffraction was used to study RE-Ti cationic anti-site defects with concentrations that decrease in both samples with increasing temperature starting from 1100 ºC, and the defects disappear at 1400 ºC. SQUID magnetometry measurements revealed that GTO shows a predominantly anti-ferromagnetic structure, whereas HTO exhibits magnetic saturation and a ferromagnetic component at low temperature. Impedance spectroscopy data revealed strongly increased ionic oxygen vacancy conduction in HTO ceramic pellets as compared to GTO, which may be associated with a higher degree of oxygen vacancy disorder. This argument was supported by Raman spectroscopy data.

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“…Beside the commercial CeO 2 powder (Sigma Aldrich, 99.999%, Merck KGaA, Darmstadt, Germany), as a source of ceria, two differently synthesized CeO 2 powders were also used: CeO 2 synthesized by the MGNP procedure (particle size about 40 nm) and SPRT method (particle size about 5 nm). [31][32][33]. All mixtures were alkali activated by sodium silicate (Na 2 SiO 3 ) and 12 M NaOH (Sigma Aldrich analytical grade, Merck KGaA, Darmstadt, Germany) (solid/liquid = 0.85).…”

Section: Samples Preparationsmentioning

confidence: 99%

“…The calculated porosity parameters obtained using the α s -plot method show that the sample is dominantly mezoporous (S meso = 30.55 m 2 g −1 ) with a certain amount of microporosity (S micro = 16.66 m 2 g −1 and V micro = 0.0078 cm 3 g −1 ), which is in accordance with the PSD data. Generally, it is considered that the mesopores are formed between the particles, while micropores are formed on the particles [33]. Since the XRPD analysis showed that the particles of CeO 2 have small diameters (order of magnitude nm) [31], during the agglomeration, they could be incorporated in micro and mesopores.…”

Section: Adsorption Isotherms-bet Analysismentioning

confidence: 99%

Geopolymer/CeO2 as Solid Electrolyte for IT-SOFC

et al. 2020

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As a material for application in the life sciences, a new composite material, geopolymer/CeO2 (GP_CeO2), was synthesized as a potential low-cost solid electrolyte for application in solid oxide fuel cells operating in intermediate temperature (IT-SOFC). The new materials were obtained from alkali-activated metakaolin (calcined clay) in the presence of CeO2 powders (x = 10%). Besides the commercial CeO2 powder, as a source of ceria, two differently synthesized CeO2 powders also were used: CeO2 synthesized by modified glycine nitrate procedure (MGNP) and self-propagating reaction at room temperature (SPRT). The structural, morphological, and electrical properties of pure and GP_CeO2-type samples were investigated by X-ray powder diffraction (XRPD), Fourier transform infrared (FTIR), BET, differential thermal and thermogravimetric analysis (DTA/TGA), scanning electron microscopy (FE-SEM), energy dispersive spectrometer (EDS), and method complex impedance (EIS). XRPD and matrix-assisted laser desorption and ionization time-of-flight (MALDI-TOF) analysis confirmed the formation of solid phase CeO2. The BET, DTA/TGA, FE-SEM, and EDS results indicated that particles of CeO2 were stabile interconnected and form a continuous conductive path, which was confirmed by the EIS method. The highest conductivity of 1.86 × 10−2 Ω−1 cm−1 was obtained for the sample GP_CeO2_MGNP at 700 °C. The corresponding value of activation energy for conductivity was 0.26 eV in the temperature range 500–700 °C.

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Structural, morphological, and electrical properties of doped ceria as a solid electrolyte for intermediate-temperature solid oxide fuel cells

Cited by 28 publications

References 56 publications

Structural, morphological and electrical properties of Ce1−Ru O2−δ (x=0.005–0.02) solid solutions

Structural, morphological and electrical properties of Ce1−Ru O2−δ (x=0.005–0.02) solid solutions

Anti-site disorder and physical properties in microwave synthesized RE₂Ti₂O₇ (RE = Gd, Ho) pyrochlores

Geopolymer/CeO2 as Solid Electrolyte for IT-SOFC

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Structural, morphological, and electrical properties of doped ceria as a solid electrolyte for intermediate-temperature solid oxide fuel cells

Cited by 28 publications

References 56 publications

Structural, morphological and electrical properties of Ce1−Ru O2−δ (x=0.005–0.02) solid solutions

Structural, morphological and electrical properties of Ce1−Ru O2−δ (x=0.005–0.02) solid solutions

Anti-site disorder and physical properties in microwave synthesized RE2Ti2O7 (RE = Gd, Ho) pyrochlores

Geopolymer/CeO2 as Solid Electrolyte for IT-SOFC

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Anti-site disorder and physical properties in microwave synthesized RE₂Ti₂O₇ (RE = Gd, Ho) pyrochlores