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Superionic Conductivity of Sm3+, Pr3+, and Nd3+ Triple-Doped Ceria through Bulk and Surface Two-Step Doping Approach
Royal Inst Technol, Dept Energy Technol, SE-10044 Stockholm, Sweden..
Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen Key Lab New Lithium Ion Batteries & Meso, Shenzhen 518060, Guangdong, Peoples R China..
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences. Natl Univ Singapore, NUS Environm Res Inst, 1 Create Way, Singapore 138602, Singapore..
Hubei Univ, Fac Phys & Elect Sci, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430062, Hubei, Peoples R China..
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2017 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 9, no 28, 23614-23623 p.Article in journal (Refereed) Published
Abstract [en]

Sufficiently high oxygen ion conductivity of electrolyte is critical for good performance of low-temperature solid oxide fuel cells (LT-SOFCs). Notably, material conductivity, reliability, and manufacturing cost are the major barriers hindering LT-SOFC commercialization. Generally, surface properties control the physical and chemical functionalities of materials. Hereby, we report a Sm3+, Pr3+, and Nd3+ triple-doped ceria, exhibiting the highest ionic conductivity among reported doped-ceria oxides, 0.125 S cm(-1) at 600 degrees C. It was designed using a two-step wet-chemical coprecipitation method to realize a desired doping for Sm3+ at the bulk and Pr3+/Nd3+ at surface domains (abbreviated as PNSDC). The redox couple Pr3+ Pr4+ contributes to the extraordinary ionic conductivity. Moreover, the mechanism for ionic conductivity enhancement is demonstrated. The above findings reveal that a joint bulk and surface doping methodology for ceria is a feasible approach to develop new oxide-ion conductors with high impacts on advanced LT-SOFCs.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2017. Vol. 9, no 28, 23614-23623 p.
Keyword [en]
LT-SOFCs, doped ceria, bulk and surface doping, oxygen ion conductivity, redox
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:uu:diva-332852DOI: 10.1021/acsami.7b02224ISI: 000406172700035PubMedID: 28650612OAI: oai:DiVA.org:uu-332852DiVA: diva2:1155655
Funder
Swedish Research Council, 621-2011-4983EU, FP7, Seventh Framework Programme, 303454
Available from: 2017-11-08 Created: 2017-11-08 Last updated: 2017-11-14Bibliographically approved

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