Electrophoretic deposition of apatite type lanthanum silicates for SOFC half cell production

Jothinathan, Ezhil; Biest, Omer Van der; Zhang, Fei

doi:10.1179/1743676112y.0000000015

Cited by 5 publications

(4 citation statements)

References 43 publications

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“…Nowadays new synthesis processes are applied to alleviate the calcination conditions and reduce the production cost. In recent years, sol-gel synthesis methods (18)(19)(20)(21)(22)(23)(24) have become a research focus in consideration of its relatively low cost and simple implementation after the pioneer work carried out by Tao et al (17).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Pure La_10-XSr_xSi₆O_27-0.5x Apatites Using an Optimized Sol-Gel Process

Ma¹,

Fenineche²,

Molière³

et al. 2015

ECS Trans.

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Apatite-type lanthanum silicates draw researcher’s attention due to their good performances as electrolyte materials for IT-SOFC (intermediate temperature solid oxide fuel cells). In this paper we present the synthesis and characterization of Sr-doped La10Si6O27 (LSO) prepared through an optimized water-based sol-gel process. The parameters involved in this process have been investigated to obtain high purity, high crystallinity powders. The mechanisms of the sol-gel reactions that underlie the quality of the sol are discussed. The developed sol gel process allows to obtain pure apatite structures through a calcination step of 2 hours at a temperature as low as 800℃. The resulting materials were characterized by scanning electron microscopy, X-ray diffraction and energy-dispersive X-ray spectroscopy. Ionic conductivities have been measured after sintering at 1500℃ and the effect of the Sr-doping has been investigated. The results show that the ionic conductivity is thermally activated and values lies between 4.5×10-2 and 1×10-6 Scm-1 at 873 K as a function of the composition and powder preparation conditions.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Pure La_10-XSr_xSi₆O_27-0.5x Apatites Using an Optimized Sol-Gel Process

Ma¹,

Fenineche²,

Molière³

et al. 2015

ECS Trans.

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“…used EPD technique to develop porous LSM/LSM‐YSZ cathode layers onto a carbon‐sputtered surface of dense zirconia sheet. Recently, Jothinathan et al . successfully demonstrated the uniform deposition of aluminum‐doped lanthanum silicate directly onto the porous anode substrate using a conducting polymer substrate as the backing electrode.…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic Deposition of Zirconia Thin Film on Nonconducting Substrate for Solid Oxide Fuel Cell Application

Das

Basu

2014

J. Am. Ceram. Soc.

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Electrophoretic deposition (EPD) of 8 mol% yttria‐stabilized zirconia (YSZ) electrolyte thin film has been carried out onto nonconducting porous NiO‐YSZ cermet anode substrate using a fugitive and electrically conducting polymer interlayer for solid oxide fuel cell (SOFC) application. Such polymer interlayer burnt out during the high‐temperature sintering process (1400°C for 6 h) leaving behind a well adhered, dense, and uniform ceramic YSZ electrolyte film on the top of the porous anode substrate. The EPD kinetics have been studied in depth. It is found that homogeneous and uniform film could be obtained onto the polymer‐coated substrate at an applied voltage of 15 V for 1 min. After the half‐cell (anode + electrolyte) is co‐fired at 1400°C, a suitable cathode composition (La0.65Sr0.3MnO3) thick film paste is screen printed on the top of the sintered YSZ electrolyte. A second stage of sintering of such cathode thick film at 1100°C for 2 h finally yield a single cell SOFC. Such single cell produced a power output of 0.91 W/cm2 at 0.7 V when measured at 800°C using hydrogen and oxygen as fuel and oxidant, respectively.

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“…These pictures indicates that the lanthanum silicate film is relatively dense and the thickness is about 10¯m which is less than the value in the previous work with the EPD. 22) Although we have to use an appropriate substrate in order to apply the EPD film to IT-SOFC, it can be concluded that our strategy is one of the easy promising ways to manufacture a dense thin film of the lanthanum silicate.…”

Section: Electrophoretic Depositionmentioning

confidence: 99%

“…As for the powder-synthesis process, some liquid-based methods, such as a solgel method, 6)8) a coprecipitation method, 9)11) an urea-nitrates combustion, 12) a molten-salt synthesis, 13) and a hydrothermal method, 14) succeeded in a preparation of the nanopowder at relatively low temperature. Previous works also applied an alcoxide-hydrolysis method, 15) a plasma spray synthesis, 16)18) a magnetron sputtering, 19),20) a spin coating 21) and an electrophoretic deposition using powder prepared by a solgel process, 22) for a film preparation of the lanthanum silicates. In general, however, most of these processes cannot be considered as a simple process, and thus another strategy for manufacturing of the dense film electrolyte is still expected highly at the moment.…”

Section: )5)mentioning

confidence: 99%

Hydrothermal synthesis of lanthanum silicate nanopowder and film preparation by electrophoretic deposition method

Kitamura

Kaneko

Kamagata

et al. 2016

J. Ceram. Soc. Japan

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We synthesize a nanosized lanthanum silicate, La 9.33 Si 6 O 26 , by means of a hydrothermal method, and then investigate the crystal structure by the Rietveld analysis and the maximum-entropy method using a neutron Bragg profile. In addition, we study electrical conduction properties of the sintered pellet with conductivity measurements under O 2 oxidizing and Ar reducing conditions. From these results, it is indicated that the oxyapatite-type lanthanum silicate with oxide-ion conduction can be prepared at 180°C hydrothermally. By using the nanopowder, we prepare a film of the lanthanum silicate via the electrophoretic deposition. As a result, it is demonstrated that a deposited film can be made successfully in an I 2 -added acetone bath and the thickness obtained in an optimized condition is around 10¯m.

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Electrophoretic deposition of apatite type lanthanum silicates for SOFC half cell production

Cited by 5 publications

References 43 publications

Synthesis of Pure La_10-XSr_xSi₆O_27-0.5x Apatites Using an Optimized Sol-Gel Process

Synthesis of Pure La_10-XSr_xSi₆O_27-0.5x Apatites Using an Optimized Sol-Gel Process

Electrophoretic Deposition of Zirconia Thin Film on Nonconducting Substrate for Solid Oxide Fuel Cell Application

Hydrothermal synthesis of lanthanum silicate nanopowder and film preparation by electrophoretic deposition method

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Electrophoretic deposition of apatite type lanthanum silicates for SOFC half cell production

Cited by 5 publications

References 43 publications

Synthesis of Pure La10-XSrxSi6O27-0.5x Apatites Using an Optimized Sol-Gel Process

Synthesis of Pure La10-XSrxSi6O27-0.5x Apatites Using an Optimized Sol-Gel Process

Electrophoretic Deposition of Zirconia Thin Film on Nonconducting Substrate for Solid Oxide Fuel Cell Application

Hydrothermal synthesis of lanthanum silicate nanopowder and film preparation by electrophoretic deposition method

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Synthesis of Pure La_10-XSr_xSi₆O_27-0.5x Apatites Using an Optimized Sol-Gel Process

Synthesis of Pure La_10-XSr_xSi₆O_27-0.5x Apatites Using an Optimized Sol-Gel Process