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Industrial grade rare-earth triple-doped ceria applied for advanced low-temperature electrolyte layer-free fuel cells
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
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2017 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 42, no 34, 22273-22279 p.Article in journal (Refereed) Published
Abstract [en]

In this study, the mixed electron-ion conductive nanocomposite of the industrial-grade rare-earth material (Le(3+), Pr3+ and Nd3+ triple-doped ceria oxide, noted as LCPN) and commercial p-type semiconductor Ni0.8Co0.15Al0.05Li-oxide (hereafter referred to as NCAL) were studied and evaluated as a functional semiconductor-ionic conductor layer for the advanced low temperature solid oxide fuel cells (LT-SOFCs) in an electrolyte layer-free fuel cells (EFFCs) configuration. The enhanced electrochemical performance of the EFFCs were analyzed based on the different semiconductor-ionic compositions with various weight ratios of LCPN and NCAL. The morphology and microstructure of the raw material, as prepared LCPN as well the commercial NCAL were investigated and characterized by Xray diffraction (XRD), scanning electron microscope (SEM), and energy-dispersive X-ray spectrometer (EDS), respectively. The EFFC performances and electrochemical properties using the LCPN-NCAL layer with different weight ratios were systematically investigated. The optimal composition for the EFFC performance with 70 wt% LCPN and 30 wt% NCAL displayed a maximum power density of 1187 mW cm(-2) at 550 degrees C with an open circuit voltage (OCV) of 1.07 V. It has been found that the well-balanced electron and ion conductive phases contributed to the good fuel cell performances. This work further promotes the development of the industrial-grade rare-earth materials applying for the LTSOFC technology. It also provides an approach to utilize the natural source into the energy field.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2017. Vol. 42, no 34, 22273-22279 p.
Keyword [en]
Industrial-grade rare-earth doped, ceria, Electrolyte layer-free fuel cells, Ionic conductor, Electronic conductor, Electrochemical performance
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-215836DOI: 10.1016/j.ijhydene.2017.04.075ISI: 000411545300073Scopus ID: 2-s2.0-85020065957OAI: oai:DiVA.org:kth-215836DiVA: diva2:1149851
Conference
5th Global Conference on Materials Science and Engineering (CMSE), NOV 08-11, 2016, Tunghai Univ, Taichung, TAIWAN
Note

QC 20171017

Available from: 2017-10-17 Created: 2017-10-17 Last updated: 2017-10-17Bibliographically approved

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Afzal, Muhammad

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