An all-solid-state lithium secondary battery includes a positive electrode; a negative electrode; and a solid electrolyte arranged between the positive and negative electrodes, to conduct lithium ions. In the all-solid-state lithium secondary battery, a mixed layer is in close contact with a surface of the solid electrolyte adjacent to the positive electrode, the mixed layer containing the positive-electrode active material and (Li x(1−α) , M xα/β ) γ+ (B 1−y , A y ) z+ O 2− δ (wherein in the formula, M and A each represent at least one or more elements selected from C, Al, Si, Ga, Ge, In, and Sn, α satisfies 0≦α<1, β represents the valence of M, γ represents the average valence of (Li + x(1−α) , M α ), y satisfies 0≦y<1, z represents the average valence of (B 1−y , A y ) and x, α, β, γ, z, and γ satisfy the relational expression (x(1−α)+xα/β)γ+z=2δ) serving as a matrix.

All-solid-state lithium secondary battery and method for producing the same

In a Li ion conductivity oxide solid electrolyte containing lithium, lanthanum, and zirconium, a part of oxygen is substituted by an element M (M=N, Cl, S, Se, or Te) having smaller electronegativity than oxygen.

Solid electrolyte and all-solid state lithium ion secondary battery

A garnet-type oxide sintered body according to the present invention includes crystal grains composed of a garnet-type oxide containing Li, La and Zr and a grain boundary composition containing boron and silicon and filling gaps between the crystal grains. The oxide sintered body has the characteristics of high density and high ion conductivity. A production method of the sintered body includes a step of providing a precursor material by mixing a garnet-type oxide powder containing Li, La and Zr with a sintering aid; a step of forming the precursor material into a formed body; and a sintering step of sintering the formed body. The sintering aid contains oxygen, boron, silicon and lithium. The oxygen and boron, or the oxygen and silicon, contained in the sintered aid form a compound.

Garnet-Type Oxide Sintered Body and Method for Producing Same

A lithium secondary battery (solid electrolyte battery) includes a positive electrode which includes a positive electrode active material layer containing lithium oxide, a negative electrode which includes a negative electrode active material layer, a first solid electrolyte layer which is provided in contact with the positive electrode active material layer between the positive electrode and the negative electrode and contains lithium and oxygen, and a second solid electrolyte layer which is provided in contact with the negative electrode active material layer between the positive electrode and the negative electrode and contains lithium, nitrogen, and oxygen. It is preferred that each of the first solid electrolyte layer and the second solid electrolyte layer further contains boron.

Solid electrolyte battery, electrode assembly, composite solid electrolyte, and method for producing solid electrolyte battery

PROBLEM TO BE SOLVED: To provide a method for manufacturing a garnet type ion-conducting oxide by which a garnet type ion-conducting oxide capable of conducting lithium can be baked at a lower temperature.SOLUTION: An all-solid type lithium secondary battery 20 comprises: a solid electrolytic layer 10 including a garnet type oxide; a positive electrode 12 formed on one surface of the solid electrolytic layer 10; and a negative electrode 14 formed on the other surface of the solid electrolytic layer 10. The all-solid type lithium secondary battery 20 has a complex arranged by integrally baking the solid electrolytic layer 10 with a positive electrode active material layer 12a laminated therewith. The complex is arranged by integrally baking a laminate including the solid electrolytic layer and the active material layer. The solid electrolytic layer includes: a base material, of which the primary component is given by the basic composition, Li(La, A)(Zr, T)O(where A represents at least one of Sr and Ca; T represents at least one of Nb and Ta; X and Y satisfy the conditions: 0≤X≤1.0 and 0≤Y<0.75); and additive components including lithium borate and aluminum oxide.

Garnet type ion-conducting oxide, complex, lithium secondary battery, method for manufacturing garnet type ion-conducting oxide, and method for manufacturing complex

PROBLEM TO BE SOLVED: To provide a garnet type ionic conductivity oxide in which the decrease in conductivity is suppressed as much as possible, and the firing energy is made to decrease moreSOLUTION: The garnet type ionic conductivity oxide includes Li, La, and Zr, an element A that is an element different from La, and is at least one kind of an alkaline earth metal and a lanthanoid element, and an element B that is an element different from Zr, and is at least one kind of a transition element and a typical element belonging to Group 12- Group 15 that can take six coordinations with oxygen Moreover, the garnet type ionic conductivity oxide may be shown by a basic composition LiLaSrZrNbO, in the formula, X satisfies X=24-3×a-2×b and (0<Y≤10, 0<Z≤10) when the average valency of (LaSr) is assumed to be a, and the average valency of (ZrNb) is assumed to be b

Garnet type ionic conductivity oxide and manufacturing method of the same

PROBLEM TO BE SOLVED: To improve ion conductivity in an ion conductive solid including Li, B, and C.SOLUTION: The ion conductive solid is represented by the general formula: LiBCO(0<x<1) and is solidified after melting at a temperature higher than the melting point. It is preferable that the treatment temperature during melting is a temperature higher than 700°C. The solid-state battery comprises a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, a solid electrolyte interposed between the positive electrode and the negative electrode and the ion conductive solid and at least one of the positive electrode active material, the negative electrode active material and the solid electrolyte is dispersed in the ion conductive solid.

Ion conductive solid, method for producing the same, and solid-state battery

PROBLEM TO BE SOLVED: To further increase the utilization ratio of active materialSOLUTION: In the electrode of the present invention, an active material particle, a melt of a lithium boron-containing oxide having a lower melting temperature than that of the active material particle and capable of conducting lithium ions, and an electrode solid electrolyte having higher lithium ion conductivity than the lithium boron-containing oxide are mixed In this electrode, a compact including active material particles, a lithium boron-containing oxide having a lower melting temperature than the active material particles and being capable of conducting lithium ions, and a solid electrolyte in the electrode having lithium ion conductivity higher than lithium boron-containing oxide may be prepared by heating at a temperature equal to or higher than the melting temperature of the lithium boron-containing oxide This electrode may be, for example, an electrode 30 in which an active material particles 32 and intra-electrode solid electrolyte particles 36 are dispersed in lithium boron-containing oxide base material 34SELECTED DRAWING: Figure 1

Electrode, electrode manufacturing method and battery

PROBLEM TO BE SOLVED: To improve the ion conductivity of a perovskite type ion conductive oxideSOLUTION: A perovskite type ion conductive oxide comprises Li, Sr, and Zr, and also comprises element A comprising at least one of Ca, Ba, Sc, Y, Na, K, Rb, Cs and Ln (lanthanoid of atom numbers 57-71) and element M comprising at least one of Ta, Nb, W, Mo, Re, Ru and Os The perovskite type ion conductive oxide may be represented by the basic composition LisqSrAZrMO(where sq is an atomic vacancy, satisfying 0<x<1, 0<y<1, 0<a<1, x(n-4)+a(1-y-z)(m-2)=y+2z (where, m is a valence of A, n is a valence of M))SELECTED DRAWING: None

Asaoka Masahiko

Papers

Garnet type ionic conductivity oxide and manufacturing method of the same

Garnet type ion-conducting oxide, complex, lithium secondary battery, method for manufacturing garnet type ion-conducting oxide, and method for manufacturing complex

Ion conductive solid, method for producing the same, and solid-state battery

Electrode, electrode manufacturing method and battery

Perovskite type ion conductive oxide, complex and lithium secondary battery