Enhanced conductivity of SDC based nanocomposite electrolyte by spark plasma sintering

Jing, Yingying; Ma, Ying; Patakangas, Janne; Johnsson, Mats; Cura, M. Erkin; Lund, Peter

doi:10.1016/j.ijhydene.2014.02.126

Cited by 18 publications

(12 citation statements)

References 18 publications

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“…All compounds presented single-phase structures. Up to 1000 C, the material presented chemical stability with SDC electrolytes, which is an excellent material for electrolytes operating at intermediate temperatures [59]. The electronic conductivity decreases with an increase in Ni content.…”

Section: Lnbaco 2 O 5þd Double Perovskite Cobalt-based Materials Withmentioning

confidence: 95%

Novel materials for solid oxide fuel cell technologies: A literature review

Silva

Souza

2017

International Journal of Hydrogen Energy

334

110

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This study aims to review novel materials for solid oxide fuel cell (SOFC) applications covered in literature. Thence, it was found that current SOFC operating conditions lead to issues, such as carbon surface deposition, sulfur poisoning and quick component degradation at high temperatures, which make it unsuitable for a few applications. Therefore, many researches are focused on cell performance enhancement through replacing the materials being used in order to improve properties and/or reduce operating temperatures. Most modifications in the anode aim to avoid some issues concerning conventionally used Ni-based materials, such as carbon deposition and sulfur poisoning, besides enhancing catalytic activity, once this component is directly exposed to the fuel. It was also found literature about the cathode with the aim of developing a material with enhanced properties in a wider temperature range, which has been compared to the currently used one: LSM perovskite (La 1-x Sr x MnO 3). Novel electrolyte materials can have ionic or protonic conductivity, thus performance degradation must be avoided at several operating conditions. In order to enhance its electrochemical performance, different materials for electrodes (cathode and anode) and electrolytes have been assessed herein.

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Section: Lnbaco 2 O 5þd Double Perovskite Cobalt-based Materials Withmentioning

confidence: 95%

Novel materials for solid oxide fuel cell technologies: A literature review

Silva

Souza

2017

International Journal of Hydrogen Energy

334

110

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“…15 . In addition, less impurities in the ceramic phase 12 , or improved densification of the materials were offered as additional explanations for the observed results 8 . With regards to the grain boundary conductivity in particular, recent results have indicated that samples sintered at lower temperature possess smaller grain size and higher grain boundary resistivity 13 .…”

Section: Introductionmentioning

confidence: 95%

Spark-plasma-sintered barium zirconate based proton conductors for solid oxide fuel cell and hydrogen separation applications

Wang

Liu

et al. 2015

International Journal of Hydrogen Energy

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Proton conducting ceramics exhibit high levels of bulk proton conductivity at intermediate temperatures (500-700 o C). However, this material class has not been widely utilized in energy conversion and storage applications due to the blocking behavior of the grain boundary proton conduction. A better understanding of proton conduction in these materials requires a systematic study of the sintering conditions that determine microstructure and ultimately the electrical properties. In this work, spark plasma sintering with high heating rates was employed to prepare a state-of-the-art BaZr 0.9 Y 0.1 O 3-δ (BZY) proton conductor for studies focused on the behavior of proton conduction at the grain boundary interfaces. The ceramics prepared by the SPS method resulted in an ultra-fine grain size of approximately 200 nm. The large grain boundary interfacial area was used as a "tool" to investigate the interfacial conduction in these materials systems. Samples displayed a lowered grain boundary conductivity and a higher activation energy compared with the literature results on conventionally prepared materials. The lower bulk conductivity is interpreted with reference to polymorphs of BZY sintered at different temperatures. The combined effect led to a lower total conductivity of the SPS densified BZY ceramics.

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“…However, as the operating temperature decreases, the cell performance also degrades, mainly due to the reduced catalyst activity and electrolyte conductivity. Thus, developments of new electrolyte materials with improved conductivities for low temperature SOFC (LT‐SOFC) are imperative …”

Section: Introductionmentioning

confidence: 99%

“…Thus, developments of new electrolyte materials with improved conductivities for low temperature SOFC (LT-SOFC) are imperative. [3][4][5] Composite materials consisting of one oxide phase and one molten salt phase are promising electrolyte candidates of LT-SOFC due to their enhanced overall conductivities. 6,7 Ceria-carbonate composites are typical representatives.…”

Section: Introductionmentioning

confidence: 99%

The microstructure effect on ion conduction in composite electrolyte

Zheng

Shen

2018

Int J Energy Res

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Summary In this work, the microstructure of composite electrolyte is reconstructed by randomly packing cubes, and the charge transport process is simulated to calculate the effective conductivity ratio σeff/σ0 of the designated conducting phase. Effects of the volume fraction and the electrolyte particle size on σeff/σ0 are also examined. Results show that σeff/σ0 is independent of the particle size but sensitive to its volume fraction. Finally, a new formula is proposed to quickly predict the σeff/σ0 of the designated conducting phase in composite electrolyte with varying compositions.

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Enhanced conductivity of SDC based nanocomposite electrolyte by spark plasma sintering

Cited by 18 publications

References 18 publications

Novel materials for solid oxide fuel cell technologies: A literature review

Novel materials for solid oxide fuel cell technologies: A literature review

Spark-plasma-sintered barium zirconate based proton conductors for solid oxide fuel cell and hydrogen separation applications

The microstructure effect on ion conduction in composite electrolyte

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