The dependence of structure and conductivity in three-dimensional phosphate ionic conductors on composition |
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| Authors: | Masayuki Nagai Satoru Fujitsu Takafumi Kanazawa Hiroaki Yanagida |
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| Affiliation: | (1) Department of Industrial ChemistryFaculty of Technology, Tokyo Metropolitan University, Fukasawa, Setagaya-ku, 158 Tokyo, Japan;(2) Department of Industrial Chemistry, Faculty of Engineering, University of Tokyo, Hongo, Bunkyo-ku, 113 Tokyo, Japan |
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| Abstract: | Two series of solid solutions, Na
x
Ca(1−x)/2Zr2(PO4)3 (NCZP(x), 0⩽x⩽1) and Na
x
Nb1-x
Zr1+x
(PO4)3(NNZP(x), 0⩽x⩽1), were synthesized. They were examined by powder X-ray diffraction, infra-red (i.r.) absorption and Raman scattering.
Ionic conductivities of graphite coated samples were measured. A complete series of solid solutions was formed for NCZP(x), while a second phase was found forx<0.1 for NNZP(x). The i.r. and Raman spectra of their solid solutions consistently showed the formation of PO4 tetrahedra with different geometries. The composition dependence of conductivity is interpreted on the basis of a structural
change around Na+. |
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| Keywords: | |
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