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    Novel Aspects of the Conduction Mechanisms of Electrolytes Containing Tetrahedral Moieties

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    Publication date
    2010-04
    Author
    Kendrick, E.
    Kendrick, John
    Orera, A.
    Panchmatia, P.
    Islam, M.S.
    Slater, P.R.
    Keyword
    Fuel Cells
    Ionic Conductivity
    Modelling
    Solid Oxide Fuel Cell
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Traditionally materials with the fluorite and perovskite structures have dominated the research in the area of oxide ion/proton conducting solid electrolytes. In such cases, the key defects are oxide ion vacancies, and conduction proceeds via a simple vacancy hopping mechanism. In recent years, there has been growing interest in alternative structure types, many of which contain tetrahedral moieties. For these new systems, an understanding of the accommodation of defects and the nature of the conduction mechanism is important for the optimisation of their conductivities, as well as to help target related structures that may display high oxide ion/proton conduction. Computer modelling studies on a range of systems containing tetrahedral moieties are presented, including apatite-type La9.33+xGe6O26+3x/2, cuspidine-type La4Ga2¿xTixO9+x/2 and La1¿xBa1+xGaO4¿x/2. The type of anion defect (vacancy or interstitial), their location and the factors affecting their incorporation are discussed. In addition, modelling data to help to understand their conduction mechanisms are presented, showing novel aspects including the important role of the tetrahedral moieties in the conduction processes
    URI
    http://hdl.handle.net/10454/4753
    Version
    published version paper
    Citation
    Kendrick, E., Kendrick, J., Orera, A., Panchmatia, P., Islam, M. S. and Slater, P. R. (2010). Novel Aspects of the Conduction Mechanisms of Electrolytes Containing Tetrahedral Moieties. Fuel Cells, http://dx.doi.org/10.1002/fuce.201000044. [Published online in advance of print, 01/09/2010].
    Link to publisher’s version
    http://dx.doi.org/10.1002/fuce.201000044
    Type
    Article
    Collections
    Life Sciences Publications

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