CeO2 based materials doped with lanthanides for applications in intermediate temperature electrochemical devices

Pikalova, E. Yu.; Мурашкина, А. А.; Maragou, V.; Demin, A.; Strekalovsky, Victor; Tsiakaras, Panagiotis

doi:10.1016/j.ijhydene.2011.01.132

Cited by 117 publications

(63 citation statements)

References 27 publications

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“…In addition, these values are lower in comparison to the literature data [21], as well to the data for pure CeO 2 . This holds also for lower temperatures [21], as well as for similar oxygen ion conductors reported in the literature [17,23,55]. Thus, the addition of the ruthenium ions as a dopant to CeO 2 attenuates the mobility of oxygen vacancies responsible for the conductivity.…”

Section: Electrical Properties Of Sintered Samples Cesupporting

confidence: 76%

“…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%

“…Because of its fluorite type crystal structure, the lattice of CeO 2 is able to accommodate relatively large amount of group IIA or rare earth metal cations (Ca 2 þ , Sr 2 þ , La 3 þ , Nd 3 þ , Sm 3 þ , Eu 3 þ , Gd 3 þ , Dy 3 þ , Ho 3 þ , Er 3 þ , Yb 3 þ Y 3 þ ), which may modify its electrical conductivity [6,7,[17][18][19][20][21][22][23][24][25][26]. Several authors reported that the electrical conductivity of multidoped ceria based materials could be even 30% higher than the single doped material [27].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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 Cesupporting

confidence: 76%

Section: Electrical Properties Of Sintered Samples Cementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…However, only a few results have been reported for the cell performance using anode-supported LSGM electrolyte films prepared by the conventional wet process [11,[13][14][15][16]. This may be due to the fact that sintering LDC is rather difficult, and its electrical conductivity is lower than that of LSGM [21][22][23][24][25]. Therefore, increasing the property of sintering and conductivity on LDC buffer layer plays an important role in cell performance [11].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, a transition metal oxide such as CuO, Co 3 O 4 , Fe 2 O 3 , and MnO 2 has been reported to improve sintering and electrical properties for doped ceria [26][27][28][29][30][31][32]. However, the influence of sintering property for LDC on the power density of the resulting cell has not been studied in details, although a few results on the effect of co-doping for the electrical conductivity of LDC have reported [22][23][24][25]. LDC has to be co-fired with LSGM electrolyte for preventing a chemical reaction.…”

Section: Introductionmentioning

confidence: 99%

Improved sintering and electrical properties of La-doped CeO2 buffer layer for intermediate temperature solid oxide fuel cells using doped LaGaO3 film prepared by screen printing process

Hong

Inagaki

Ida

et al. 2011

J Solid State Electrochem

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Effects of a sintering agent for La-doped ceria (LDC) as a buffer layer to prevent a chemical reaction between Ni in anode and Sr-and Mg-doped lanthanum gallate (LSGM) electrolyte during sintering were studied for improving sintering and electrical properties. Electrochemical performance of anode-supported solid oxide fuel cells (SOFCs) using LDC and LSGM films prepared by screen printing and co-sintering (1,350°C) was also investigated. The prepared cell with dense LDC (ca. 17 μm) and LSGM electrolyte (ca. 60 μm) films showed an open circuit voltage close to the theoretical value of 1.10 V and a high maximum power density (0.831 Wcm -2 ) at 700°C. The addition of 1 wt.% LSGM to porous LDC buffer layer was effective for improving the sintering density and electrical conductivity, resulting in the high power density due to the decreased internal resistance loss.

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Scalable Oxygen‐Ion Transport Kinetics in Metal‐Oxide Films: Impact of Thermally Induced Lattice Compaction in Acceptor Doped Ceria Films

Rupp

Fabbri

Marrocchelli

et al. 2014

Adv Funct Materials

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In this paper, we focus on the effect of processing‐dependent lattice strain on oxygen ion conductivity in ceria based solid electrolyte thin films. This is of importance for technological applications, such as micro‐SOFCs, microbatteries, and resistive RAM memories. The oxygen ion conductivity can be significantly modified by control of lattice strain, to an extent comparable to the effect of doping bulk ceria with cations of different diameters. The interplay of dopant radii, lattice strain, microstrain, anion‐cation near order and oxygen ion transport is analyzed experimentally and interpreted with computational results. Key findings include that films annealed at 600 °C exhibit lattice parameters close to those of their bulk counterparts. With increasing anneal temperature, however, the films exhibited substantial compaction with lattice parameters decreasing by as much as nearly 2% (viz, Δd600–1100 °C: –1.7% (Sc+3) > –1.5% (Gd+3) > –1.2% (La+3)) for the annealing temperature range of 600–1100 °C. Remarkably 2/3rd of the lattice parameter change obtained in bulk ceria upon changing the acceptor diameter from the smaller Sc to larger La, can be reproduced by post annealing a film with fixed dopant diameter. While the impact of lattice compaction on defect association/ordering cannot be entirely excluded, DFT computation revealed that the main effect appears to result in an increase in migration energy and consequent drop in ionic conductivity. As a consequence, it is clear that annealing procedures should be held to a minimum to maintain the optimum level of oxygen ion conductivity for energy‐related applications. Results reveal also the importance to understand the role of electro‐chemo‐mechanical coupling that is active in thin film materials.

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CeO2 based materials doped with lanthanides for applications in intermediate temperature electrochemical devices

Cited by 117 publications

References 27 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

Improved sintering and electrical properties of La-doped CeO2 buffer layer for intermediate temperature solid oxide fuel cells using doped LaGaO3 film prepared by screen printing process

Scalable Oxygen‐Ion Transport Kinetics in Metal‐Oxide Films: Impact of Thermally Induced Lattice Compaction in Acceptor Doped Ceria Films

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