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Title
Japanese: 
English:Synthesis, Structure and Electrochemical Properties of Layered La2Li2x(CO3)1−xO2+2x 
Author
Japanese: MUHAMMAD IQBAL, 小林 玄器, 平山 雅章, 菅野 了次.  
English: Iqbal Muhammad, Genki Kobayashi, Masaaki Hirayama, Ryoji Kanno.  
Language English 
Journal/Book name
Japanese: 
English:Jouranl of Solid State Chemistry 
Volume, Number, Page Vol. 206        p. 14-19
Published date Oct. 13, 2013 
Publisher
Japanese: 
English:ELSEVIER 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.1016/j.jssc.2013.06.024
Abstract An oxide ion conductor, La2Li2x(CO3)1−xO2+x (x=0.15), was synthesized using a solid-state reaction, and its structure was subsequently determined by Rietveld refinement analyses of synchrotron X-ray and high-resolution powder neutron diffraction data. These analyses determined that carbonate groups are situated between (La2O22+)n layers in an ordered arrangement and that both oxygen vacancies and interstitial oxygen ions exist within the carbonate layers, resulting in a composition of La2Li0.3(CO3)0.85O2.3. This material is structurally stable up to 500 °C and exhibits a conductivity of 5.5×10−5 S cm−1 at 450 °C. Oxide vacancies associated with carbonate anions appear to be responsible for the ionic conduction observed in this material.

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