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An efficient carbon resistant composite Ni0.6Zn0.4O2-delta-GDC anode for biogas fuelled solid oxide fuel cell
COMSATS Univ Islamabad, Pakistan; Govt Punjab, Pakistan.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering. COMSATS Univ Islamabad, Pakistan.
COMSATS Univ Islamabad, Pakistan; Univ Okara, Pakistan.
COMSATS Univ Islamabad, Pakistan.
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2019 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 438, article id 227042Article in journal (Refereed) Published
Abstract [en]

This paper describes the fabrication of Ni0.6Zn0.4-Gd0.2Ce0.8O2-delta (NiZn-GDC) via a two-step wet chemical synthesis technique. This composite was found to be more thermally stable and carbon resistive under the intense reducing environment of biogas. This was confirmed by different characterization techniques. The maximum power density P-max, was achieved at 600 degrees C as 820 mW/cm(2) and 548 mW/cm(2) with hydrogen and biogas, respectively. Different characterization techniques have been performed, such as X-ray diffractometry (XRD), scanning electron microscopy (SEM/EDX), UV visible spectroscopy, and Raman spectroscopy. The XRD pattern by Rietveld refinement showed two-phase structures of the anode composite with an average crystallite size of 25 35 nm before and after reduction with methane. The optical band gap (E-g(opt)) of NiZn-GDC was calculated to be 2.24eV from the Tauc plot using absorbance data. The Nyquist plot was also drawn to study the AC electrochemical impedance spectra (EIS) of the nanocomposite anode from 450 degrees C to 600 degrees C in air. The maximum DC conductivity of 1.37 S/cm was observed at a temperature of 600 degrees C using the four-probe DC technique.

Place, publisher, year, edition, pages
ELSEVIER , 2019. Vol. 438, article id 227042
Keywords [en]
Biogas; Efficient anode; Nanocomposite; Fuel cell performance
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-161379DOI: 10.1016/j.jpowsour.2019.227042ISI: 000490030800066OAI: oai:DiVA.org:liu-161379DiVA, id: diva2:1367512
Note

Funding Agencies|Higher Education Commission of Pakistan (HEC)Higher Education Commission of Pakistan

Available from: 2019-11-04 Created: 2019-11-04 Last updated: 2019-11-04

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