Lithium-lanthanum-titanium oxide sintered material, solid electrolyte containing the oxide, and lithium air battery and all-solid lithium battery including the solid electrolyte
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United States of America Patent
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Jul 18, 2017
Grant Date -
Apr 9, 2015
app pub date -
Apr 22, 2013
filing date -
Apr 25, 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, Srx-1.5aLaaLi1.5-2xTi0.5Ta0.5O3 (0.55≦x≦0.59, 0≦a≦0.2, M=at least one of Fe or Ga), amount of Al contained is 0.35 mass % or less as Al2O3, amount of Si contained is 0.1 mass % or less as SiO2, and average particle diameter is 18 μm or more.
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