Ordered to defect fluorite structural transition in Ce1-xNdxO2-δ system and its influence on ionic conductivity
The structural transformation from fluorite – defect fluorite – hexagonal phase on the heavily doped ceria system (Ce1-xNdxO2-δ X = 0, 25, 50, 75 and 100 mol%) has been investigated in this study. The oxygen ionic conductivity increased with dopant content till 50 mol% due to the formation of rare e...
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| Veröffentlicht in: | Journal of alloys and compounds 2020-10, Vol.838, p.155534, Article 155534 |
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| container_title | Journal of alloys and compounds |
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| creator | Aarthi, U. Shukla, Dhananjaya Rengaraj, S. Babu, K. Suresh |
| description | The structural transformation from fluorite – defect fluorite – hexagonal phase on the heavily doped ceria system (Ce1-xNdxO2-δ X = 0, 25, 50, 75 and 100 mol%) has been investigated in this study. The oxygen ionic conductivity increased with dopant content till 50 mol% due to the formation of rare earth C-type superstructure defect fluorite. The co-formation of rare earth C-type structure along with the fluorite increase the anion vacancies and facilitates the barrier free ion migration. The long-range ordering and the existence of mixed phases in the heavily doped (75 mol%) system lowered the oxide ion conductivity. Ce0.5Nd0.5O1.75 in disordered fluorite structure exhibits a superior ionic conductivity of 6.0 mS/cm with an activation energy of 0.93 eV which has a potential as electrolyte in solid oxide fuel cells application.
[Display omitted]
•The structural transformation with respect to dopant concentration have been investigated.•50 mol % Nd doped CeO2 (C50N50) shows the formation of rare earth C type structure.•C50N50 exhibited the higher ionic conductivity of 6.0 mScm−1 with 0.93 eV activation energy. |
| doi_str_mv | 10.1016/j.jallcom.2020.155534 |
| format | Article |
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[Display omitted]
•The structural transformation with respect to dopant concentration have been investigated.•50 mol % Nd doped CeO2 (C50N50) shows the formation of rare earth C type structure.•C50N50 exhibited the higher ionic conductivity of 6.0 mScm−1 with 0.93 eV activation energy.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2020.155534</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Ceria ; Cerium oxides ; Conductivity ; Defects ; Electrolytic cells ; Fluorite ; Hexagonal phase ; Ion currents ; Ion migration ; Ions ; Solid oxide fuel cells ; Superstructures ; Vacancy</subject><ispartof>Journal of alloys and compounds, 2020-10, Vol.838, p.155534, Article 155534</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier BV Oct 15, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c252t-758053dab850869ef34f023c8a6db7e524dd5b336f17a1503417dccd537d3b33</citedby><cites>FETCH-LOGICAL-c252t-758053dab850869ef34f023c8a6db7e524dd5b336f17a1503417dccd537d3b33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jallcom.2020.155534$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Aarthi, U.</creatorcontrib><creatorcontrib>Shukla, Dhananjaya</creatorcontrib><creatorcontrib>Rengaraj, S.</creatorcontrib><creatorcontrib>Babu, K. Suresh</creatorcontrib><title>Ordered to defect fluorite structural transition in Ce1-xNdxO2-δ system and its influence on ionic conductivity</title><title>Journal of alloys and compounds</title><description>The structural transformation from fluorite – defect fluorite – hexagonal phase on the heavily doped ceria system (Ce1-xNdxO2-δ X = 0, 25, 50, 75 and 100 mol%) has been investigated in this study. The oxygen ionic conductivity increased with dopant content till 50 mol% due to the formation of rare earth C-type superstructure defect fluorite. The co-formation of rare earth C-type structure along with the fluorite increase the anion vacancies and facilitates the barrier free ion migration. The long-range ordering and the existence of mixed phases in the heavily doped (75 mol%) system lowered the oxide ion conductivity. Ce0.5Nd0.5O1.75 in disordered fluorite structure exhibits a superior ionic conductivity of 6.0 mS/cm with an activation energy of 0.93 eV which has a potential as electrolyte in solid oxide fuel cells application.
[Display omitted]
•The structural transformation with respect to dopant concentration have been investigated.•50 mol % Nd doped CeO2 (C50N50) shows the formation of rare earth C type structure.•C50N50 exhibited the higher ionic conductivity of 6.0 mScm−1 with 0.93 eV activation energy.</description><subject>Ceria</subject><subject>Cerium oxides</subject><subject>Conductivity</subject><subject>Defects</subject><subject>Electrolytic cells</subject><subject>Fluorite</subject><subject>Hexagonal phase</subject><subject>Ion currents</subject><subject>Ion migration</subject><subject>Ions</subject><subject>Solid oxide fuel cells</subject><subject>Superstructures</subject><subject>Vacancy</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkM1KAzEUhYMoWKuPIARcT83vTLoSKf5BsZvuQ5pkIMM0qUmmtO_lc_hMZhj3ri7ce865nA-Ae4wWGOH6sVt0qu912C8IImXHOafsAsywaGjF6np5CWZoSXglqBDX4CalDiGElxTPwGETjY3WwBygsa3VGbb9EKLLFqYcB52HqHqYo_LJZRc8dB6uLK5On-a0IdXPN0znlO0eKm-gy6ncS4D12sJRHLzTUAdvSpI7uny-BVet6pO9-5tzsH192a7eq_Xm7WP1vK404SRXDReIU6N2giNRL21LWYsI1ULVZtdYTpgxfEdp3eJGYY4ow43R2nDaGFr2c_AwxR5i-BpsyrILQ_TloySMEUqwoKyo-KTSMaQUbSsP0e1VPEuM5MhWdvKPrRzZyolt8T1NPlsaHJ2NMmk3djYuFoTSBPdPwi-B-Iag</recordid><startdate>20201015</startdate><enddate>20201015</enddate><creator>Aarthi, U.</creator><creator>Shukla, Dhananjaya</creator><creator>Rengaraj, S.</creator><creator>Babu, K. Suresh</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20201015</creationdate><title>Ordered to defect fluorite structural transition in Ce1-xNdxO2-δ system and its influence on ionic conductivity</title><author>Aarthi, U. ; Shukla, Dhananjaya ; Rengaraj, S. ; Babu, K. Suresh</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c252t-758053dab850869ef34f023c8a6db7e524dd5b336f17a1503417dccd537d3b33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Ceria</topic><topic>Cerium oxides</topic><topic>Conductivity</topic><topic>Defects</topic><topic>Electrolytic cells</topic><topic>Fluorite</topic><topic>Hexagonal phase</topic><topic>Ion currents</topic><topic>Ion migration</topic><topic>Ions</topic><topic>Solid oxide fuel cells</topic><topic>Superstructures</topic><topic>Vacancy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Aarthi, U.</creatorcontrib><creatorcontrib>Shukla, Dhananjaya</creatorcontrib><creatorcontrib>Rengaraj, S.</creatorcontrib><creatorcontrib>Babu, K. Suresh</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Aarthi, U.</au><au>Shukla, Dhananjaya</au><au>Rengaraj, S.</au><au>Babu, K. Suresh</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ordered to defect fluorite structural transition in Ce1-xNdxO2-δ system and its influence on ionic conductivity</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2020-10-15</date><risdate>2020</risdate><volume>838</volume><spage>155534</spage><pages>155534-</pages><artnum>155534</artnum><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>The structural transformation from fluorite – defect fluorite – hexagonal phase on the heavily doped ceria system (Ce1-xNdxO2-δ X = 0, 25, 50, 75 and 100 mol%) has been investigated in this study. The oxygen ionic conductivity increased with dopant content till 50 mol% due to the formation of rare earth C-type superstructure defect fluorite. The co-formation of rare earth C-type structure along with the fluorite increase the anion vacancies and facilitates the barrier free ion migration. The long-range ordering and the existence of mixed phases in the heavily doped (75 mol%) system lowered the oxide ion conductivity. Ce0.5Nd0.5O1.75 in disordered fluorite structure exhibits a superior ionic conductivity of 6.0 mS/cm with an activation energy of 0.93 eV which has a potential as electrolyte in solid oxide fuel cells application.
[Display omitted]
•The structural transformation with respect to dopant concentration have been investigated.•50 mol % Nd doped CeO2 (C50N50) shows the formation of rare earth C type structure.•C50N50 exhibited the higher ionic conductivity of 6.0 mScm−1 with 0.93 eV activation energy.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2020.155534</doi></addata></record> |
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| language | eng |
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| subjects | Ceria Cerium oxides Conductivity Defects Electrolytic cells Fluorite Hexagonal phase Ion currents Ion migration Ions Solid oxide fuel cells Superstructures Vacancy |
| title | Ordered to defect fluorite structural transition in Ce1-xNdxO2-δ system and its influence on ionic conductivity |
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