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Research Papers

Characterization of Anode-Supported Solid Oxide Fuel Cells With Nd2NiO4 Cathodes

[+] Author and Article Information
V. A. Haanappel1

Institute of Energy Research, Forschungszentrum Jülich, D-52425 Jülich, Germanyv.haanappel@fz-juelich.de

C. Lalanne

ICMCB, CNRS, Université de Bordeaux, 1, 87, Avenue du Dr. Schweitzer, 33608 Pessac-Cedex, France

A. Mai

 Hexis AG, Hegifeldstrasse 30, CH-8404 Winterthur, Switzerland

F. Tietz

Institute of Energy Research, Forschungszentrum Jülich, D-52425 Jülich, Germany

1

Corresponding author.

J. Fuel Cell Sci. Technol 6(4), 041016 (Aug 17, 2009) (6 pages) doi:10.1115/1.3009267 History: Received October 15, 2007; Revised January 11, 2008; Published August 17, 2009

A systematic study was initiated of anode-supported solid oxide fuel cells (SOFCs) with Nd2NiO4 cathodes. This type of cathode, a mixed conducting K2NiF4-type material, can be considered as a candidate for SOFC applications. In this study, the influence of (1) the presence of a Ce0.8Gd0.2O1.9 (CGO) interlayer between the electrolyte and the cathode, (2) sintering conditions, and (3) the grain size of the powder on the performance of SOFCs with Nd2NiO4 cathodes was investigated in more detail. Results from current density-voltage characteristics and permeation and gas diffusion measurements showed that the electrochemical performance was promising for SOFCs including a CGO interlayer and a Nd2NiO4 cathode (prepared with a powder with a d50 of 0.5Acm2 or 0.8μm) sintered at 1100°C or higher; current density at 800°C and 700mV between 1.2 and 1.3Acm2. The microstructure of the cathode was such that no gas diffusion problems occurred.

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Figures

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Figure 1

SEM micrographs of two single cells with Nd2NiO4 cathode (sintered for 20min at 1200°C): (a) with CGO layer (sintered for 3h at 1250°C) (b) without CGO layer

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Figure 2

Current density-voltage curves for 16cm2Nd2NiO4-type single cells between 650°C and 800°C. Closed symbols: with CGO layer; open symbols: without CGO layer. Fuel gas: H2(3%H2O)=1000ml∕min; oxidant: air=1000ml∕min.

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Figure 3

Current density-voltage curves for 16cm2Nd2NiO4-type single cells (d50=0.8μm) as a function of the sintering temperature. Open symbols: 1100°C; half-open symbols: 1150°C; closed symbols: 1200°C. Fuel gas: H2(3%H2O)=1000ml∕min; oxidant: air=1000ml∕min.

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Figure 4

Current densities as a function of the operating temperature for SOFCs with Nd2NiO4 cathodes sintered at 1100°C and 1150°C and prepared with two different sized powders

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Figure 5

Transport parameters from the MTPM model as a function of the sintering temperature of the Nd2NiO4-type cathode. a) Mean pore radius ⟨r⟩; (b) mean square of the radius of the transport pores ⟨r2⟩; and (c) Ψ factor.

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Figure 6

Current density at 700mV of anode-supported SOFCs with LSM, Nd2NiO4, and LSCF cathode as function of the operation temperature

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