Lithium-lanthanum-titanium oxide sintered material, solid electrolyte containing the oxide, lithium air battery and all-solid lithium battery including the solid electrolyte, and method for producing the lithium-lanthanum-titanium oxide sintered material
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United States of America Patent
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Jul 4, 2017
Grant Date -
Jun 25, 2015
app pub date -
Jul 12, 2013
filing date -
Jul 27, 2012
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Abstract
A lithium-lanthanum-titanium oxide sintered material has a lithium ion conductivity 3.0×10−4 Scm−1 or more at a measuring temperature of 27° C., the material is described by one of general formulas (1-a)LaxLi2-3xTiO3-aSrTiO3, (1-a)LaxLi2-3xTiO3-aLa0.5K0.5TiO3, LaxLi2-3xTi1-aMaO3-a, and Srx-1.5aLaaLi1.5-2xTi0.5Ta0.5O3 (0.55≦x≦0.59, 0≦a≦0.2, M=at least one of Al, Fe and Ga), and concentration of S is 1500 ppm or less. The material is obtained by sintering raw material powder mixture having S content amount of 2000 ppm or less in the entirety of raw material powders for mixture, that is, titanium raw material, lithium raw material, and lanthanum raw material.
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