Investigation of the Structural and Catalytic Requirements for High-Performance SOFC Anodes Formed by Infiltration of LSCM

Kim, Guntae; Lee, Shiwoo; Shin, Jeeyoung; Corre, Gaël; Irvine, John T. S.; Vohs, John M.; Gorte, Raymond J.

doi:10.1149/1.3065971

Cited by 148 publications

(117 citation statements)

References 29 publications

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“…However, the SiO2 support had low electrical conductivity, thus it was required to be mixed with a conductive component such as silver to increase the electrical conductivity [10]. In addition, the performance-limiting factor in solid oxide fuel cells (SOFC) is often the electrode impedance [11][12][13] which can be avoided by using low-temperature, infiltration procedures to synthesize the electrodes [14][15][16][17]. This procedure involves a preparation of porous YSZ (dense YSZ is the electrolyte) scaffold together with the electrolyte layer, then infiltrating the required precursor salts to form the particle within the scaffold.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Na2WO4-Mn Supported YSZ as a Potential Anode Catalyst for Oxidative Coupling of Methane in SOFC Reactor

Appamana

Charojrochkul

Assabumrungrat

et al. 2015

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Abstract. The oxidative coupling of methane (OCM) over a 5%Na2WO4-2%Mn on YSZ, has been investigated in a fixed bed reactor (FBR) and a solid oxide fuel cell reactor (SOFC). A 60% C2 selectivity and a 26% CH4 conversion have been obtained in a FBR at 800 o C and CH4/O2 of 4:1. Importantly, an addition of Na2WO4-Mn to YSZ support can significantly enhance the performance of the catalyst especially C2 hydrocarbons selectivity and CH4 conversion. A maximum power density of 7.8 mW cm −2 was achieved at 800°C with CH4 in the SOFC reactor having a 50 μm thick YSZ electrolyte. The CH4 conversion and C2 selectivity at 800°C were 1.1% and 85.2%, respectively.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Na2WO4-Mn Supported YSZ as a Potential Anode Catalyst for Oxidative Coupling of Methane in SOFC Reactor

Appamana

Charojrochkul

Assabumrungrat

et al. 2015

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“…Cu _ ceria base and some perovskite oxides, which are highly tolerant to the redox cycle, have been widely investigated as oxide anode materials for SOFC. Ceria-based ceramic anodes with small amounts of metal additives such as Cu or Pd perform reliably and Cu _ ceria seems to be suited for hydrocarbon fuel 20), 21) . However, Cu has a lower melting point and so is not compatible with typical SOFC fabrication methods, as well as providing lower electro-catalytic activity than nickel.…”

Section: Oxide Anode For Further Improvement In Power Densitymentioning

confidence: 99%

Low Temperature Solid Oxide Fuel Cells Using LaGaO<sub>3</sub>-based Oxide Electrolyte on Metal Support

Ishihara

2015

J. Jpn. Petrol. Inst.

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Solid oxide fuel cells (SOFCs) can directly convert the chemical energy of various fuels to electric power with unmatched energy conversion efficiency. The oxide ion conductivity of LaGaO3 doped with Sr and Mg (LSGM) is introduced and application of LSGM to low temperature SOFCs is explained. Power density at lower temperature was dramatically increased by application of LSGM film manufactured with laser ablation techniques. By application of a suitable buffer layer, the cell using LSGM thin film electrolyte had reasonable power density (0.2 W cm -2 ) at 773 K. Ce0.6Mn0.3Fe0.1O2 (CMF) oxide had high activity for the anodic reaction and insertion of a CMF layer much improved the maximum power density (0.17 W cm -2 at 673 K). Oxide anode consisting of Ce0.6Mn0.3Fe0.1O2 (CMF) _ La0.6Sr0.4Fe0.9Mn0.1O3 (LSFM) ( 12.5 : 87.5 wt%) enabled the use of dry hydrocarbon for fuel with almost no coke deposition.

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“…However, when methane is supplied to these anodes, the oxide anode showed a lower power density than that of the conventional Ni-based anode due to insufficient electrical conductivity and catalytic activity with respect to methane. The modified oxides are emerging up by infiltration of various catalysts such as Ni, Pd, and Rh to enhance their activity of hydrocarbon fuels (12,13). However, many problems still remain unsolved such as; carbon deposition, poor stability by metal coarsening and poor uniformity.…”

Section: Introductionmentioning

confidence: 99%

In Situ Tailored Nickel Nano-Catalyst Layer for Internal Reforming Hydrocarbon Fueled SOFCs

Myung

Neagu

Tham³

et al. 2015

ECS Trans.

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Conventional Ni cermet anodes suffer from carbon deposition when they are directly used with hydrocarbon fuels due to the negative effects of pyrolysis and Boudouard reactions. In this work, the use of a non-stoichiometric perovskite, La0.8Ce0.1Ni0.4Ti0.6O3, as a reforming layer in reducing atmospheres led to the surface being highly populated with homogeneously exsolved Ni nano particles. This catalyst layer was applied to Ni-GDC anode supported and ScSZ electrolyte supported cells to prevent carbon deposition and to stabilize operation with dry methane. The catalyst layer showed both excellent attachment to the Ni-GDC anode and resistance to carbon deposition. The performance of the Ni–GDC anode-supported cells with the catalyst layer was about 1.1 W/cm2 in hydrogen fuel which is similar to that seen without the use of a catalyst layer. For the ScSZ electrolyte supported cells, the catalyst layer improved the power density and stability when in operation with dry methane.

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Investigation of the Structural and Catalytic Requirements for High-Performance SOFC Anodes Formed by Infiltration of LSCM

Cited by 148 publications

References 29 publications

Synthesis of Na2WO4-Mn Supported YSZ as a Potential Anode Catalyst for Oxidative Coupling of Methane in SOFC Reactor

Synthesis of Na2WO4-Mn Supported YSZ as a Potential Anode Catalyst for Oxidative Coupling of Methane in SOFC Reactor

Low Temperature Solid Oxide Fuel Cells Using LaGaO<sub>3</sub>-based Oxide Electrolyte on Metal Support

In Situ Tailored Nickel Nano-Catalyst Layer for Internal Reforming Hydrocarbon Fueled SOFCs

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