Characterization of LSMâYSZ composite electrode by ac impedance spectroscopy

Kim, Jae-Dong; Kim, Goo-Dae; Moon, Ji-Hye; Park, Yong-il; Lee, Weon-Hae; Kobayashi, Koichi; Nagai, Masayuki; Kim, Chang-Eun

doi:10.1016/s0167-2738(01)00877-3

Cited by 374 publications

(139 citation statements)

References 14 publications

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“…Good adhesion of the interfaces even at the relatively low sintering temperature can be due to high sinterability of the nano-sized particles, while the sintering temperature of about 1200°C is needed for the conventional LSM/YSZ particles. 17) A suppressed pore closure even though the high sinterability of the nanocomposites can be ascribed to the smaller grains than pores. 18), 19) As shown in Fig.…”

Section: Jcs-japanmentioning

confidence: 99%

Novel co-precipitation derived nanostructured LSM-YSZ cathode for intermediate temperature solid oxide fuel cells

Sato

Kinoshita

Abe

et al. 2009

J. Ceram. Soc. Japan

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Strontium doped lanthanum manganite ((La0.85Sr0.15)0.98MnO3; LSM)/yttria-stabilized zirconia (YSZ) nanocomposite particles were synthesized through a novel co-precipitation method using YSZ nanoparticles with the average size of 3 nm as seed crystals. Phase evolution studies indicated that crystalline LSM/YSZ phases were obtained by calcining the co-precipitated precursor above 700°C. The nanocomposite particles calcined at 1000°C were screen printed on YSZ dense electrolytes and then sintered at 1100°C for cathode fabrication. The resulting cathode had a uniform porous structure consisting of fine grains ~100 nm in size, and exhibited low polarization resistance of 2.82, 1.18, 0.48 and 0.25 Ω·cm 2 at 650, 700, 750 and 800°C, respectively under air atmosphere. These results indicated that the present nanostructured cathode may be applicable for intermediate temperature solid oxide fuel cells.

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Section: Jcs-japanmentioning

confidence: 99%

Novel co-precipitation derived nanostructured LSM-YSZ cathode for intermediate temperature solid oxide fuel cells

Sato

Kinoshita

Abe

et al. 2009

J. Ceram. Soc. Japan

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“…The impedance arc for the surface diffusion processes would be drastically suppressed under current loading while the high-frequency one for the charge transfer processes would be nearly unaffected [27,34]. Therefore, the charge transfer resistance is a key factor limiting the cell performance.…”

Section: Effect Of 5ce10sczr Proportionmentioning

confidence: 99%

Investigation of LSM–ScSZ composite cathodes for anode-supported solid oxide fuel cells

et al. 2005

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“…De acordo com a literatura estes fenômenos estão relacionados ao transporte de O 2-do TPB para o eletrólito (altas frequências) ou à difusão das espécies O -da superfície do eletrodo (frequências intermediárias). 68 Devido à maior resistividade eletrônica do LSM (~10 -2 Ω cm a 800 ºC) em relação ao cermet ZEI/Ni (~10 -4 Ω cm a 800 ºC), o catodo contribui de forma mais significativa para a resistência da célula. Assim, as medidas elétricas de meias células catodo/eletrólito e de células unitárias são importantes para se avaliar o desempenho das mesmas e, consequentemente, da pilha.…”

Section: Exemplos De Estudos Eletroquímicos Realizados Em Pacosunclassified

“…Assim, as medidas elétricas de meias células catodo/eletrólito e de células unitárias são importantes para se avaliar o desempenho das mesmas e, consequentemente, da pilha. 22,63,65 De acordo com Kim e colaboradores, 68 o seguinte mecanismo é proposto para as reações que ocorrem no catodo:…”

Section: Exemplos De Estudos Eletroquímicos Realizados Em Pacosunclassified

Montagem e caracterização elétrica de pilhas a combustível de óxido sólido (PaCOS)

Tarôco¹,

Andrade²,

Brant³

et al. 2009

Quím. Nova

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Recebido em 7/8/08; aceito em 16/1/09; publicado na web em 11/5/09 ASSEMBLY AND ELECTRICAL CHARACTERIZATION OF SOLID OXIDE FUEL CELL STACKS. This paper is focused on a review of the design features and the electrochemistry characterization of anode-supported planar SOFC. Studies and results of metallic alloy interconnectors and recovery for protection against corrosion and for contact layer are showed. Moreover a discussion of examples of measurements of impedance spectrometry, according to the literature and our experimental results are made. For the anode supported fuel cells the power density varies from 0.1 to 0.5 Wcm 2 , according to results in the literature (showed in this paper). For electrolyte supported fuel cell the power density can be 10 Wcm -2 for high temperatures. An English-Portuguese glossary of most used terms in SOFC stack is given for greater clarity and to introduce new terms to the reader.Keywords: SOFC, planar stack, impedance spectrometry. INTRODUÇÃOAs pilhas a combustível (PaC) são dispositivos que convertem energia química em energia elétrica, através da reação eletroquímica entre um combustível (H 2 ) e um oxidante (O 2 ), com mínima emissão de poluentes tóxicos e alta eficiência. 1,2Existem 5 tipos de PaC: as alcalinas (AFC) com temperatura de operação entre 60-90 ºC, as de membrana polimérica (PE-MFC), 80-90 ºC, as de carbonato fundido (MCFC), 650-700 ºC, as de ácido fosfórico (PAFC), 160-200 ºC e as de óxido sólido (PaCOS), 800-900 ºC.3,4 Cada célula possui um tipo de eletrólito com temperaturas de operações diferentes, fazendo com que tenham aplicações diversificadas como aeroespaciais, estacionárias ou móveis. Nesta revisão será dada ênfase às pilhas a combustível de óxido sólido (PaCOS) que são formadas por empilhamentos de células unitárias constituídas por dois eletrodos porosos cerâmicos (anodo e catodo) e por um eletrólito cerâmico denso e condutor iônico. Serão discutidos também de forma mais detalhada, os interconectores (cerâmicos ou metálicos) que são os dispositivos responsáveis pelo contato elétrico entre as células unitárias e a distribuição dos gases nos eletrodos das PaCOS.Durante

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Characterization of LSMâYSZ composite electrode by ac impedance spectroscopy

Cited by 374 publications

References 14 publications

Novel co-precipitation derived nanostructured LSM-YSZ cathode for intermediate temperature solid oxide fuel cells

Novel co-precipitation derived nanostructured LSM-YSZ cathode for intermediate temperature solid oxide fuel cells

Investigation of LSM–ScSZ composite cathodes for anode-supported solid oxide fuel cells

Montagem e caracterização elétrica de pilhas a combustível de óxido sólido (PaCOS)

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Characterization of LSMâYSZ composite electrode by ac impedance spectroscopy

Cited by 374 publications

References 14 publications

Novel co-precipitation derived nanostructured LSM-YSZ cathode for intermediate temperature solid oxide fuel cells

Novel co-precipitation derived nanostructured LSM-YSZ cathode for intermediate temperature solid oxide fuel cells

Investigation of LSM–ScSZ composite cathodes for anode-supported solid oxide fuel cells

Montagem e caracterização elétrica de pilhas a combustível de óxido sólido (PaCOS)

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Characterization of LSMâYSZ composite electrode by ac impedance spectroscopy