Structural, optical and electrical properties of Ce0.8Sm0.2-Er O2- (x = 0–0.2) Co-doped ceria electrolytes

Anwar, Matloob; Ali, Muhammed; Baharuddin, Nurul Akidah; Raduwan, Nor Fatina; Muchtar, Andanastuti; Somalu, Mahendra Rao

doi:10.1016/j.ceramint.2018.04.200

Cited by 37 publications

(11 citation statements)

References 57 publications

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“…Co-doping enhances the ionic conductivity of ceria-based electrolytes. A decrease in the total conductivity and an increase in the activation energy of Sm 3+ and Gd 3+ co-doped ceria electrolyte were demonstrated because of the decreased mobility of oxygen vacancies [9,10].…”

Section: Introductionmentioning

confidence: 99%

Electrical properties of Cu-Mn-Zr co-doped ceria electrolytes for intermediate temperature solid oxide fuel cell application

Zagaynov

Fedorov

Goldberg

2019

PAC

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Nanocrystalline triple-doped ceria based solid electrolyte materials (Cu x Mn 0.1-x Zr 0.1 Ce 0.8 O 2 , where x = 0, 0.02, 0.04, 0.06, 0.08 and 0.1, as well as Cu 0.08 Mn 0.02 Zr y Ce 0.9-y O 2 , where y = 0 and 0.1) for intermediate temperature solid oxide fuel cells were successfully synthesized by co-precipitation method with sonication and sintered at 1150°C for 4 h in air. Relative densities of all the samples were above 90-96%. All systems were characterized by XRD, SEM-EDS and TG-DSC-MS for the investigation of structure and microstructure with elemental composition. The electrical conductivity of these materials was measured by AC impedance spectroscopy in the temperature range of 500-750°C in air. It was shown that Cu 0.08 Mn 0.02 Zr 0.1 Ce 0.8 O 2 ceramics possessed the maximum conductivity of 8 • 10 −3 S/cm at 600°C in air.

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Section: Introductionmentioning

confidence: 99%

Electrical properties of Cu-Mn-Zr co-doped ceria electrolytes for intermediate temperature solid oxide fuel cell application

Zagaynov

Fedorov

Goldberg

2019

PAC

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“…Furthermore, the powder precursors of these materials should be produced through a simple and cheap process, easily scalable at industrial level and characterized by a very high yield, thus making IT-SOFCs commercial exploitation actually real [6]. Several classes of materials have been proposed in literature as alternative to YSZ ceramic electrolyte for IT-SOFCs such as bismuth-based oxides, zirconia-based oxides [7], ceria-based oxides [8], and lanthanum gallate-based oxides [9], but among them, the most widely studied are doped/codoped ceria and, in particular, Sm-doped CeO 2 [10], Gd-doped CeO 2 [11], and Gd/Sm codoped CeO 2 [12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Controlled Coprecipitation of Amorphous Cerium-Based Carbonates with Suitable Morphology as Precursors of Ceramic Electrolytes for IT-SOFCs

et al. 2019

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To be suitable as electrolytes in intermediate temperature solid oxide fuel cell (IT-SOFC), ceramic precursors have to be characterized by high sintering aptitude for producing fully densified products which are needed for this kind of application. Therefore, synthesis processes able to prepare highly reactive powders with low costs are noteworthy to be highlighted. It has been shown that amorphous coprecipitates based on cerium doped (and codoped) hydrated hydroxycarbonates can lead to synthesized ceramics with such desired characteristics. These materials can be prepared by adopting a simple coprecipitation technique using ammonium carbonate as precipitating agent. As a function of both the molar ratio between carbonate anions and total metallic cations, and the adopted mixing speed, the coprecipitate can be either amorphous, owning a very good morphology, or crystalline, owning worse morphology, packing aptitude, and sinterability. The amorphous powders, upon a mild calcination step, gave rise to the formation of stable solid solutions of fluorite-structured ceria maintaining the same morphology of the starting powders. Such calcined powders are excellent precursors for sintering ceramic electrolytes at low temperatures and with very high electrical conductivity in the intermediate temperature range (i.e., 500–700 °C). Therefore, irrespective of the actual composition of ceria-based systems, by providing an accurate control of both chemical conditions and physical parameters, the coprecipitation in the presence of ammonium carbonate can be considered as one of the most promising synthesis route in terms of cost/effectiveness to prepare excellent ceramic precursors for the next generation of IT-SOFC solid electrolytes.

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“…As commonly known, the application complex electrochemical impedance spectroscopy (EIS) is well developed technique for characterization of the electrical properties of solid electrolytes based on the interfacial reaction at the electrode surface [19,21,[23][24][25][30][31][32][33][34][35]. Besides the total conductivity values, it provides useful information related to the contribution of grains' interior, grain boundaries, and electrode-electrolyte interface to the overall ionic conductivity [23][24][25].…”

Section: Electrical Conductivitymentioning

confidence: 99%

“…Despite sintering temperature as high as 1550 °C, the overall mole fraction of dopants was kept constant (x = 0.2). The dopant concentration was determined based on the previous literature reports, which found that the optimum lies within the range of 10-20 mol% for many cations in fluorite ceria lattice enabling the achievement of the highest possible ionic conductivity [22][23][24][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Development of a new system of solid ionic conductors based on multi-doped ceria for application in IT-SOFCs

Stojmenović

Žunić

Basoli

et al. 2022

PAC

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Nanosized multi-doped ceria with composition Ce0.8Nd0.0025Sm0.0025Gd0.005Dy0.095Y0.095O2-? (CNSGDY) as perspective solid ionic conductor was obtained by modified glycine-nitrate procedure (MGNP) and room temperature self-propagating reaction (SPRT). The pressed pellets of both powders were sintered at 1550?C for 2 h in an air atmosphere. The obtained sintered samples were characterized by XRPD, Raman spectroscopy, FESEM, EDS and EIS methods. Despite a high temperature of sintering, XRPD and FESEM analyses of the samples confirmed appropriate dimensions of grains with fluorite structure. Overall concentration of introduced dopants (x = 0.2) in the structure of CeO2 after the sintering process was confirmed by EDS analysis. After sintering, Raman spectroscopy confirmed retention of the oxygen vacancies in the ceria lattice, which is in accordance with the improvement of ionic conductivity of solid ionic conductors. The highest value of total conductivity was obtained for the sintered MGNP sample at 700?C (4.22 ? 10?2 S cm?1), with the corresponding activation energy of 0.26 eV.

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Structural, optical and electrical properties of Ce0.8Sm0.2-Er O2- (x = 0–0.2) Co-doped ceria electrolytes

Cited by 37 publications

References 57 publications

Electrical properties of Cu-Mn-Zr co-doped ceria electrolytes for intermediate temperature solid oxide fuel cell application

Electrical properties of Cu-Mn-Zr co-doped ceria electrolytes for intermediate temperature solid oxide fuel cell application

Controlled Coprecipitation of Amorphous Cerium-Based Carbonates with Suitable Morphology as Precursors of Ceramic Electrolytes for IT-SOFCs

Development of a new system of solid ionic conductors based on multi-doped ceria for application in IT-SOFCs

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Structural, optical and electrical properties of Ce0.8Sm0.2-Er O2- (x = 0–0.2) Co-doped ceria electrolytes

Cited by 37 publications

References 57 publications

Electrical properties of Cu-Mn-Zr co-doped ceria electrolytes for intermediate temperature solid oxide fuel cell application

Electrical properties of Cu-Mn-Zr co-doped ceria electrolytes for intermediate temperature solid oxide fuel cell application

Controlled Coprecipitation of Amorphous Cerium-Based Carbonates with Suitable Morphology as Precursors of Ceramic Electrolytes for IT-SOFCs

Development of a new system of solid ionic conductors based on multi-doped ceria for application in IT-SOFCs

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Structural, optical and electrical properties of Ce0.8Sm0.2-Er O2- (x = 0–0.2) Co-doped ceria electrolytes