Effect of Contact Method between Interconnects and Electrodes on Area Specific Resistance in Planar Solid Oxide Fuel Cells

This study focuses on cathode performances of (Ln1−xSrx)CoO3−δ (Ln=Pr, Nd, Sm, and Gd, x=0, 0.3, 0.5, 0.7, and 1) for intermediate temperature-operating solid oxide fuel cells (IT-SOFCs, 600–800°C). (Ln1−xSrx)CoO3−δ powders as cathode materials for IT-SOFC, which can be operated between 600°C and 800°C were synthesized by the glycine-nitrate-process (GNP) method. The impedance spectroscopy method was used to investigate area specific resistance (ASR) and electrochemical properties of (Ln1−xSrx)CoO3−δ (Ln=Pr, Nd, Sm, and Gd, x=0, 0.3, 0.5, 0.7, and 1). Pr0.5Sr0.5CoO3−δ and Pr0.3Sr0.7CoO3−δ showed to 0.15 Ω cm2 of ASR at 700°C and Nd0.5Sr0.5CoO3−δ to 0.14 Ω cm2 at 700°C. Sm0.5Sr0.5CoO3−δ showed the lowest ASR values of 0.10 Ω cm2 on 10% Gd-doped cerium oxide at 700°C.

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The Investigation of Perovskite LaCo0.6Ni0.4O3-δ as Cathode Interface Contact Material for Intermediate Temperature Solid Oxide Fuel Cells

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.726.240 ◽

2017 ◽

Vol 726 ◽

pp. 240-244 ◽

Cited By ~ 1

Author(s):

Zhe Li ◽

Dong Yan ◽

Qian Zhang ◽

Jian Pu

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Specific Resistance ◽

Perovskite Phase ◽

Solid Oxide ◽

Intermediate Temperature ◽

Oxide Fuel ◽

Contact Material ◽

Interface Contact ◽

Precursor Route

The goal of this study is to identify LaCo0.6Ni0.4O3-δ (LCN) as reliable cathode contact material for intermediate temperature solid oxide fuel cells (SOFC). LCN was prepared through the polymeric steric entrapment precursor route and calcined at 800 °C which shows single perovskite phase. Area specific resistance (ASR) of LCN was measured at 750 °C. The investigation shows that the ASR can be maintained about 50 mΩ·cm2 for 100 hours operation, and presented ASR stability within 10th thermal cycles. The excellent performance of LCN is attributed to good interface adhesion between LCN and interconnect alloy.

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Cr Poisoning On Nd2Ni0.95Cu0.05O4+δ Cathode for Solid Oxide Fuel Cells

Archives of Metallurgy and Materials ◽

10.1515/amm-2016-0107 ◽

2016 ◽

Vol 61 (2) ◽

pp. 629-634 ◽

Cited By ~ 2

Author(s):

Yeong-Ju Choe ◽

Kyoung-Jin Lee ◽

Hae-Jin Hwang

Keyword(s):

Solid Oxide Fuel Cells ◽

Specific Resistance ◽

Solid Oxide ◽

Layered Perovskite ◽

Oxide Fuel ◽

Chromium Species ◽

Poisoning Effect ◽

Chromium Poisoning ◽

Area Specific Resistance ◽

Additional Phase

Abstract In this study, Nd2Ni1-xCuxO4+δ (x=0, 0.05, 0.1, and 0.2) layered perovskite powders were synthesized by the glycine nitrate process (GNP) and the chromium poisoning effect on the electrochemical performance of the Nd2Ni0.95Cu0.05O4+δ and La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes were investigated. In the case of the LSCF cathode, the strontium chromite phase formed after the exposure of the gaseous chromium species, while there was no additional phase in the Nd2Ni0.95Cu0.05O4+δ cathode. The area specific resistance (ASR) of the Nd2Ni0.95Cu0.05O4+δ cathode did not change significantly after the exposure of the gaseous chromium species at 800°C.

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Characterization of Anode-Supported Solid Oxide Fuel Cells With PSCF Cathode

Journal of Fuel Cell Science and Technology ◽

10.1115/1.2971049 ◽

2008 ◽

Vol 6 (1) ◽

Cited By ~ 7

Author(s):

V. A. C. Haanappel ◽

A. Mai ◽

S. Uhlenbruck ◽

F. Tietz

Keyword(s):

Fuel Cells ◽

Solid Oxide Fuel Cells ◽

Physical Vapor Deposition ◽

Sintering Temperature ◽

Specific Resistance ◽

Single Cells ◽

Solid Oxide ◽

Oxide Fuel ◽

And Diffusion

A systematic study was initiated of anode-supported single cells with Pr0.58Sr0.4Co0.2Fe0.8O3−δ (PSCF) cathode. These solid oxide fuel cells (SOFCs) were characterized by electrochemical and diffusion and permeation measurements. In particular, the influence of various sintering temperatures of the cathode and various types of Ce0.8Gd0.2O2−δ (CGO) interlayer was investigated in more detail. Results from electrochemical measurements performed between 650°C and 800°C showed that the performance of anode-supported SOFCs with screen-printed porous CGO interlayer and a PSCF cathode was excellent. Even at 650°C, the area-specific resistance was lower than 0.5Ωcm2. The microstructure of the cathode and the performance of this type of SOFC were not obviously affected by variations in the sintering temperature of the cathode. Higher electrochemical performance, in particular, in the temperature range 650–750°C, was achieved by applying a thin and dense CGO interlayer using reactive sputtering or electron beam physical vapor deposition.

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