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Research Papers

# Performance Investigation of Dual Layer Yttria-Stabilized Zirconia–Samaria-Doped Ceria Electrolyte for Intermediate Temperature Solid Oxide Fuel Cells

[+] Author and Article Information
Ryan J. Milcarek

Department of Mechanical and
Aerospace Engineering,
Syracuse University,
Syracuse, NY 13244-1240
e-mail: rjmilcar@syr.edu

Kang Wang

Department of Mechanical and
Aerospace Engineering,
Syracuse University,
Syracuse, NY 13244-1240
e-mail: kwang08@syr.edu

Michael J. Garrett

Department of Mechanical and
Aerospace Engineering,
Syracuse University,
Syracuse, NY 13244-1240
e-mail: mjgarret@syr.edu

Jeongmin Ahn

Department of Mechanical and
Aerospace Engineering,
Syracuse University,
Syracuse, NY 13244-1240
e-mail: jeongahn@syr.edu

1Corresponding author.

Manuscript received November 21, 2015; final manuscript received January 30, 2016; published online March 2, 2016. Assoc. Editor: Kevin Huang.

J. Electrochem. En. Conv. Stor. 13(1), 011002 (Mar 02, 2016) (7 pages) Paper No: JEECS-15-1011; doi: 10.1115/1.4032708 History: Received November 21, 2015; Revised January 30, 2016

## Abstract

The performance of yttria-stabilized zirconia (YSZ)–samaria-doped ceria (SDC) dual layer electrolyte anode-supported solid oxide fuel cell (AS-SOFC) was investigated. Tape-casting, lamination, and co-sintering of the NiO–YSZ anode followed by wet powder spraying of the SDC buffer layer and BSCF cathode was proposed for fabrication of these cells as an effective means of reducing the number of sintering stages required. The AS-SOFC showed a significant fuel cell performance of ∼1.9 W cm−2 at 800 °C. The fuel cell performance varies significantly with the sintering temperature of the SDC buffer layer. An optimal buffer layer sintering temperature of 1350 °C occurs due to a balance between the YSZ–SDC contact and densification at low sintering temperature and reactions between YSZ and SDC at high sintering temperatures. At high sintering temperatures, the reactions between YSZ and SDC have a detrimental effect on the fuel cell performance resulting in no power at a sintering temperature of 1500 °C.

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## Figures

Fig. 1

Fuel cell performance without the SDC buffer layer operating with hydrogen fuel at a flow rate of 100 mL min−1 and air as oxidant at different operating temperatures

Fig. 2

Fuel cell performance at different sintering temperatures of the SDC buffer layer (a) 1200 °C, (b) 1250 °C, (c) 1300 °C, (d) 1350 °C, (e) 1400 °C, and (f) 1450 °C operating with hydrogen fuel at a flow rate of 100 mL min−1 and air as oxidant at different operating temperatures

Fig. 3

Fuel cell performance comparison at an operating temperature of 750 °C with the SDC buffer layer sintered between 1250 °C and 1450 °C operating with hydrogen fuel at a flow rate of 100 mL min−1 and air as oxidant

Fig. 4

Ohmic resistance, polarization resistance, and total resistance for different sintering temperatures of the SDC buffer layer from 1250 °C to 1450 °C at an operating temperature of 750 °C with hydrogen fuel at a flow rate of 100 mL min−1 and air as oxidant

Fig. 5

EDX analysis of the YSZ–SDC interface, in the middle of the SDC buffer layer and at the SDC–BSCF interface of the fuel cell sintered at 1400 °C

Fig. 6

Cross-sectional morphologies of the fuel cell with SDC buffer layer sintered at (a) 1250 °C, (b) 1300 °C, (c) 1350 °C, (d) 1400 °C, (e) 1450 °C, and (f) 1500 °C

Fig. 7

Cross-sectional morphologies of the fuel cell without a cathode layer showing changes in the YSZ–SDC interface at a SDC sintering temperature of (a) 1200 °C, (b) 1300 °C, (c) 1400 °C, and (d) 1500 °C

Fig. 8

SEM morphologies of the SDC buffer layer surface at different sintering temperatures of (a) 1400 °C (b) 1450 °C, and (c) 1500 °C

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