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- Wang, BaoyuanHubei Univ, Fac Phys & Elect Sci, Hubei Key Lab Ferro & Piezoelect Mat & Devices, Wuhan 430062, Hubei, Peoples R China. (författare)
Fast ionic conduction in semiconductor CeO2-delta electrolyte fuel cells
- Artikel/kapitelEngelska2019
Förlag, utgivningsår, omfång ...
- 2019-09-13
- Nature Publishing Group,2019
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- LIBRIS-ID:oai:DiVA.org:kth-261311
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-261311URI
- https://doi.org/10.1038/s41427-019-0152-8DOI
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- Språk:engelska
- Sammanfattning på:engelska
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- QC 20191007
- Producing electrolytes with high ionic conductivity has been a critical challenge in the progressive development of solid oxide fuel cells (SOFCs) for practical applications. The conventional methodology uses the ion doping method to develop electrolyte materials, e.g., samarium-doped ceria (SDC) and yttrium-stabilized zirconia (YSZ), but challenges remain. In the present work, we introduce a logical design of non-stoichiometric CeO2-delta based on non-doped ceria with a focus on the surface properties of the particles. The CeO2-delta reached an ionic conductivity of 0.1 S/cm and was used as the electrolyte in a fuel cell, resulting in a remarkable power output of 660 mW/cm(2) at 550 degrees C. Scanning transmission electron microscopy (STEM) combined with electron energy-loss spectroscopy (EELS) clearly clarified that a surface buried layer on the order of a few nanometers was composed of Ce3+ on ceria particles to form a CeO2-delta@CeO2 core-shell heterostructure. The oxygen deficient layer on the surface provided ionic transport pathways. Simultaneously, band energy alignment is proposed to address the short circuiting issue. This work provides a simple and feasible methodology beyond common structural (bulk) doping to produce sufficient ionic conductivity. This work also demonstrates a new approach to progress from material fundamentals to an advanced low-temperature SOFC technology.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
- Zhu, BinHubei Univ, Fac Phys & Elect Sci, Hubei Key Lab Ferro & Piezoelect Mat & Devices, Wuhan 430062, Hubei, Peoples R China.;China Univ Geosci, Fac Mat Sci & Chem, Engn Res Ctr Nanogeo Mat, Minist Educ, 388 Lumo Rd, Wuhan 430074, Hubei, Peoples R China. (författare)
- Yun, SiningXian Univ Architecture & Technol, Sch Mat & Mineral Resources, Funct Mat Lab, Xian 710055, Shaanxi, Peoples R China. (författare)
- Zhang, WeiHubei Univ, Fac Phys & Elect Sci, Hubei Key Lab Ferro & Piezoelect Mat & Devices, Wuhan 430062, Hubei, Peoples R China. (författare)
- Xia, ChenHubei Univ, Fac Phys & Elect Sci, Hubei Key Lab Ferro & Piezoelect Mat & Devices, Wuhan 430062, Hubei, Peoples R China. (författare)
- Afzal, MuhammadKTH,Energiteknik(Swepub:kth)u18047fk (författare)
- Cai, YixiaoDonghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Text Pollut Controlling Engn Ctr, Minist Environm Protect,Coll Environm Sci & Engn, 2999 Renmin North Rd, Shanghai 201620, Peoples R China. (författare)
- Liu, YanyanKTH,Energiteknik(Swepub:kth)u1plmvom (författare)
- Wang, YiMax Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany. (författare)
- Wang, HaoHubei Univ, Fac Phys & Elect Sci, Hubei Key Lab Ferro & Piezoelect Mat & Devices, Wuhan 430062, Hubei, Peoples R China. (författare)
- Hubei Univ, Fac Phys & Elect Sci, Hubei Key Lab Ferro & Piezoelect Mat & Devices, Wuhan 430062, Hubei, Peoples R China.Hubei Univ, Fac Phys & Elect Sci, Hubei Key Lab Ferro & Piezoelect Mat & Devices, Wuhan 430062, Hubei, Peoples R China.;China Univ Geosci, Fac Mat Sci & Chem, Engn Res Ctr Nanogeo Mat, Minist Educ, 388 Lumo Rd, Wuhan 430074, Hubei, Peoples R China. (creator_code:org_t)
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- Ingår i:NPG ASIA MATERIALS: Nature Publishing Group11:11884-40491884-4057
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