BROWSE

Related Researcher

Author's Photo

Kim, Guntae
gunslab
Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, PEMFC, metal-air batteries, Metal-CO2 system, Catalyst for DRM

ITEM VIEW & DOWNLOAD

Oxidation-reduction behavior of La0.8Sr0.2ScyMn1-yO3 +/-delta (y=0.2, 0.3, 0.4): Defect structure, thermodynamic and electrical properties

DC Field Value Language
dc.contributor.author Sengodan, Sivaprakash ko
dc.contributor.author Ahn, Sunghoo ko
dc.contributor.author Shin, Jeeyoung ko
dc.contributor.author Kim, Guntae ko
dc.date.available 2014-04-10T01:18:29Z -
dc.date.created 2013-06-11 ko
dc.date.issued 2012-11 -
dc.identifier.citation SOLID STATE IONICS, v.228, no., pp.25 - ko
dc.identifier.issn 0167-2738 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/2969 -
dc.identifier.uri http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84866784149 ko
dc.description.abstract Oxygen non-stoichiometry ofLa(0.8)Sr(0.2)Sc(y)Mn(1-y)O(3 +/-delta) (y = 0.2, 0.3, 0.4) oxide was studied by coulometric titration as a function of oxygen partial pressure, p(O-2), and temperature in a range of 923-1023 K. Depending on the Sc doping amount, p(O-2), and temperature, oxygen non-stoichiometry varies significantly. Under a reducing condition, La0.8Sr0.2ScyMn1-yO3 +/-delta shows both oxygen excess and oxygen deficient compositions. At the higher p(O-2) region, the oxygen excess composition is due to metal ion vacancies, whereas in the lower p(O-2) region, the oxygen deficient composition is due to the formation of oxygen vacancies. The experimental data were analyzed by a random defect model. Partial molar enthalpy and partial molar entropy of oxygen vacancy formation are calculated using the Gibbs-Helmholtz equation from the non-stoichiometric data. The electrical conductivity was measured as the function of the oxygen partial pressure and temperature. In the lower p(O-2) region, electrical conductivity strongly depends on the oxygen non-stoichiometry. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher ELSEVIER SCIENCE BV ko
dc.subject Coulometric titration ko
dc.subject Defect chemistry ko
dc.subject Electrical conductivity ko
dc.subject Intermediate temperature solid oxide fuel cell ko
dc.subject Oxygen non-stoichiometry ko
dc.title Oxidation-reduction behavior of La0.8Sr0.2ScyMn1-yO3 +/-delta (y=0.2, 0.3, 0.4): Defect structure, thermodynamic and electrical properties ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84866784149 ko
dc.identifier.wosid 000312522800005 ko
dc.type.rims ART ko
dc.description.wostc 0 *
dc.description.scopustc 0 *
dc.date.tcdate 2015-02-28 *
dc.date.scptcdate 2014-07-12 *
dc.identifier.doi 10.1016/j.ssi.2012.09.004 ko
Appears in Collections:
ECHE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show simple item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU