Lattice Expansion and Crystallite Size Analyses of NiO-BaCe 0. 54 Zr 0. 36 Y 0. 1 O 3-δ Anode Composite for Proton Ceramic Fuel Cells Application

Nurul Waheeda Mazlan, Munirah Shafiqah Murat, Chung-Jen Tseng, Oskar Hasdinor Hassan and Nafisah Osman ()
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Nurul Waheeda Mazlan: Proton Conducting Fuel Cell Group, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia
Munirah Shafiqah Murat: Faculty of Applied Sciences, Universiti Teknologi MARA, Arau 02600, Perlis, Malaysia
Chung-Jen Tseng: Center for Energy Research, National Central University, No. 300, Zhongda Rd., Zhongli District, Taoyuan City 320317, Taiwan
Oskar Hasdinor Hassan: Institute of Science, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia
Nafisah Osman: Proton Conducting Fuel Cell Group, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia

Energies, 2022, vol. 15, issue 22, 1-10

Abstract: This study reports on the structure analyses of NiO-BCZY (BCZY = BaCe 0. 54 Zr 0. 36 Y 0. 1 O 3-δ ) anode composite materials with the ratio of 50:50 for proton ceramic fuel cells (PCFCs) application. A product of sintered NiO-BCZY was developed to understand the structural properties of the anode materials. The objectives of this work were (a) to investigate the lattice expansion of the anode by using a high-temperature XRD (HT-XRD) from 400–700 °C; and (b) to calculate the crystallite size of the sample by using Scherrer’s and Williamson Hall’s methods. The results obtained from the HT-XRD revealed that the diffraction peaks of NiO and BCZY are matched with the cubic phase perovskite structure. For example at T = 400 °C, the lattice parameter of NiO is a = 4.2004 Å and BCZY is a = 4.3331 Å. The observation also showed that the lattice expansion increased with the temperature. Furthermore, analyses of the Scherrer and Williamson Hall methods, respectively, showed that the crystallite size is strongly correlated with the lattice expansion, which proved that the crystallite size increased as the operating temperature increased. The increment of crystallite size over the operating temperature contributed to the increment of conductivity values of the single cell.

Keywords: lattice expansion; crystallite size; NiO-BCZY; anode composite; conductivity; power density (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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