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Analysis of Long Term and Thermal Cycling Tests for a Commercial Solid Oxide Fuel Cell

[+] Author and Article Information
Dustin Lee

Nuclear Fuels and Materials Division, Institute of Nuclear Energy Research, No. 1000 Wenhua Rd. Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan (R.O.C.)
djlee@iner.gov.tw

Jing-Kai Lin

Nuclear Fuels and Materials Division, Institute of Nuclear Energy Research, No. 1000 Wenhua Rd. Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan (R.O.C.)
zxc782316@iner.gov.tw

Tsai Chun-Huang

Physics Division, Institute of Nuclear Energy Research, No. 1000 Wenhua Rd. Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan (R.O.C.)
tsaich@iner.gov.tw

Wu Szu-Han

Nuclear Fuels and Materials Division, Institute of Nuclear Energy Research, No. 1000 Wenhua Rd. Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan (R.O.C.)
shwu@iner.gov.tw

Cheng Yung-Neng

Nuclear Fuels and Materials Division, Institute of Nuclear Energy Research, No. 1000 Wenhua Rd. Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan (R.O.C.)
yncheng@iner.gov.tw

Lee Ruey-Yi

Nuclear Fuels and Materials Division, Institute of Nuclear Energy Research, No. 1000 Wenhua Rd. Jiaan Village, Longtan District, Taoyuan City 32546, Taiwan (R.O.C.)
rylee@iner.gov.tw

1Corresponding author.

ASME doi:10.1115/1.4037232 History: Received March 14, 2017; Revised June 22, 2017

Abstract

The effects of isothermally long-term and thermal cycling test on the performance of an ASC type commercial solid oxide fuel cell have been investigated. For the long-term test, the cells were tested over 5000 hours in two stages, the first 3000 hours and the followed 2000 hours, under the different flow rates of hydrogen and air. Regarding the thermal cycling test, 60 cycles in total were also divided into two sections, the temperature ranges of 700 °C to 250 °C and 700 °C to 50 °C were applied for the every single cycle of first 30 cycles and the later 30 cycles, respectively. The results of long-term test show that the average degradation rates for the cell in the first 3000 hours and the followed 2000 hours under different flow rates of fuel and air are 1.16 and 2.64 %/khr, respectively. However, there is only a degradation of 6.6% in voltage for the cell after 60 thermal cycling tests. In addition, it is found that many pores formed in the anode of the cell which caused by the agglomeration of Ni after long-term test. In contrast, the vertical cracks penetrating through the cathode of the cell and the in-plane cracks between the cathode and barrier layer of the cell formed due to the CTE mismatch after 60 thermal cycling tests.

Copyright (c) 2017 by ASME
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