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The fuel cells studies from ionic electrolyte Ce0.8Sm0.05Ca0.15O2-delta to the mixture layers with semiconductor Ni0.8Co0.15Al0.05LiO2-delta
Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Fac Phys & Elect Sci, Wuhan 430062, Hubei, Peoples R China..
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Fac Phys & Elect Sci, Wuhan 430062, Hubei, Peoples R China.;Royal Inst Technol, Dept Energy Technol, SE-10044 Stockholm, Sweden..
Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Fac Phys & Elect Sci, Wuhan 430062, Hubei, Peoples R China..
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2016 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 41, no 41, 18761-18768 p.Article in journal (Refereed) Published
Abstract [en]

The mixture of ionic electrolyte Ce0.8Sm0.05Ca0.15O2-delta (SCDC) and semiconductor Ni0.8Co0.15Al0.05LiO2-delta (NCAL) layers was used for low temperature solid oxide fuel cell (LT-SOFC) applications. Using the as-prepared SCDC-NCAL semiconductor-ionic layer to replace the ionic SCDC electrolyte, following results have been obtained: the SCDC electrolyte fuel cell reached a lower voltage, 1.05 V, and lower power output, 415 mW cm(-2), compared to that using the semiconductor-ionic layer, 1.06 V and 617 mW cm(-2) at 550 degrees C. The electrochemical impedance spectroscopy (EIS) was applied to investigate the electrochemical processes of the device; X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM) for the microstructure and morphology of the as-prepared materials. The results have illuminated that the introduction of semiconductor into ionic electrolyte could make extended triple phase boundary (TPB) area, which can provide more active sites to accelerate the fuel cell reactions and enhance the cell performance. Furthermore, we also discovered that the ionic SCDC and electronic NCAL should be in an appropriate composition to achieve a balanced ionic and electronic conductivity, which is the key issue for high performance semiconductor-ionic fuel cells.

Place, publisher, year, edition, pages
2016. Vol. 41, no 41, 18761-18768 p.
Keyword [en]
Solid oxide fuel cell (SOFC), Ce0.8Sm0.05Ca0.15O2-delta (SCDC), Ni0.8Co0.15Al0.05LiO2-delta (NCAL), Semiconductor-ionic composite, Fuel cell performance, Balanced ionic and electronic conductivity
National Category
Physical Chemistry Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-308621DOI: 10.1016/j.ijhydene.2016.01.127ISI: 000385598300046OAI: oai:DiVA.org:uu-308621DiVA: diva2:1050950
Conference
3rd International Workshop on Molten Carbonates and Related Topics (IWMC), JUN 11-13, 2015, NE Univ, Shenyang, PEOPLES R CHINA
Available from: 2016-11-30 Created: 2016-11-29 Last updated: 2016-12-02Bibliographically approved

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