Structure and electrical conductivity of a novel inorganic solid electrolyte: Na14.5[Al(PO4)2F2]2.5[Ti(PO4)2F2]0.5 (NATP) |
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Authors: | Ying Zhang |
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Institution: | Applied Catalysis Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning Province, China |
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Abstract: | A novel inorganic solid electrolyte with a layered framework structure stable up to 1043 K, Na14.5Al(PO4)2F2]2.5Ti(PO4)2F2]0.5 (NATP), has been hydrothermally prepared and characterized by single-crystal and powder X-ray diffraction techniques, X-ray fluorescence (XRF) analysis, IR spectroscopic measurement, thermogravimetric and differential thermal analysis (TGA and DTA). NATP crystallizes in the acentric hexagonal space group P3 with a=10.448(2), b=10.448(2), , Z=1, containing a large number of Na+ cations in the interlamellar space and the cavities of its framework. There are six different crystallographic Na+ cationic sites, in which 8% Na(5) and 12% Na(6) sites are vacant. Electrical conductivity measurements show that Na+ cations exhibit a high mobility with two domains for the electrical conductivity versus temperature. |
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Keywords: | 66 10 Ed 61 66 Fn 81 10 -h 61 10 Nz |
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