Loading patent…
AssigneesToho Titanium Co., Ltd., Nakashima Sangyo Co., Ltd., The Gakushuin School Corporation
InventorsMamoru Nakashima, Yoshiyuki Inaguma, Mikio Nakashima
Estimating the term…
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.
Lithium-lanthanum-titanium oxide sintered material, wherein 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, and wherein 0.55≦x≦0.59, 0≦a≦0.2, M=at least one of Fe and Ga, and concentration of S is 400 ppm or less, and wherein lithium ion conductivity calculated by the following formula using an impedance analyzer in measuring frequency 5 to 13 MHz and a measuring temperature of 27° C. is 3.0×10−4 Scm−1 or more, Rb (Ω) being resistance inside of particle Rgb (Ω) being resistance at interface of particle, L(cm) being thickness of tabular lithium-lanthanum-titanium oxide, and S(cm2) being area of electrode,
Dependencies are inferred from the claim text.