Abstract: A solid composition according to the present disclosure is a solid composition for use in forming a solid electrolyte having a crystal phase, containing: at normal temperature and normal pressure, an oxide having a crystal phase different from the crystal phase of the solid electrolyte; a lithium compound; and an oxo acid compound. The oxo acid compound may contain at least one of a nitrate ion and a sulfate ion as an oxo anion.

Abstract: A positive electrode active material composite particle according to the present disclosure includes a base particle constituted by a positive electrode active material containing a lithium composite oxide having a layered crystal structure, and a coating layer that is constituted by a material containing a multiple oxide different from the positive electrode active material, a lithium compound, and an oxoacid compound, and that at least partially coats a surface of the base particle. The oxoacid compound preferably contains at least one of a nitrate ion and a sulfate ion as an oxoanion.

Abstract: A solid composition according to the present disclosure is a solid composition to be used for forming a functional ceramic having a crystal phase, and contains an oxide constituted by a crystal phase different from the crystal phase of the functional ceramic at normal temperature and normal pressure, and an oxoacid compound. The oxoacid compound preferably contains at least one of a nitrate ion and a sulfate ion as an oxoanion. Further, the oxide preferably has a crystal grain size of 10 nm or more and 200 nm or less.

Abstract: A solid electrolyte coated positive electrode active material powder according to the present disclosure includes: a plurality of particles each having a mother particle formed of a positive electrode active material for a lithium ion secondary battery containing a complex oxide of Li and a transition metal T, and a coating layer formed of a garnet-type solid electrolyte represented by the following Formula (1) and coating at least a part of a surface of the mother particle: Li7-xLa3(Zr2-xMx)O12??(1) (in Formula (1), M represents one or more metal elements selected from Ta, Sb, and Nb, and 0.1?x<0.7).

Abstract: An electrolyte precursor solution includes a metallic compound containing elements constituting an electrolyte, a solvent capable of dissolving the metallic compound, and an anionic surfactant having a sulfate group (SO42?) bonded to a hydrophobic group R. By reacting such an electrolyte precursor solution with active material particles containing lithium, lithium sulfate derived from the anionic surfactant is interposed at the interface between the surface of the active material particle and the electrolyte so as to enhance the dissociation of lithium ions at the interface, and thus, an excellent ion conductivity can be realized.

Abstract: A solid electrolyte capable of securing grain boundary resistance even when sintering is performed at a relatively low temperature and a lithium ion battery using the solid electrolyte are provided. The solid electrolyte includes a first electrolyte which contains a lithium composite metal compound containing one kind of first metal element selected from group 13 elements in period 3 or higher, and a second electrolyte which contains Li and at least two kinds of second metal elements selected from group 5 elements in period 5 or higher or group 15 elements in period 5 or higher.

Abstract: An electrode composite body includes: an active material molded body including active material particles which include a lithium composite oxide and have a particle shape, and a communication hole that is provided between the active material particles; a first solid electrolyte layer that is provided on a surface of the active material molded body, and includes a first inorganic solid electrolyte; and a second solid electrolyte layer that is provided on the surface of the active material molded body, and includes a second inorganic solid electrolyte of which a composition is different from a composition of the first inorganic solid electrolyte, and which contains boron as a constituent element and is amorphous.

Abstract: A solid electrolyte capable of securing grain boundary resistance even when sintering is performed at a relatively low temperature and a lithium ion battery using the solid electrolyte are provided. The solid electrolyte includes a first electrolyte which contains a lithium composite metal compound containing one kind of first metal element selected from group 13 elements in period 3 or higher, and a second electrolyte which contains Li and at least two kinds of second metal elements selected from group 5 elements in period 5 or higher or group 15 elements in period 5 or higher.

Abstract: A manufacturing method of an electrode assembly capable of easily manufacturing a configuration in which an electrolyte and an active material are bonded to each other. A step of supplying, solidifying, and crystallizing a solid electrolyte including Li2+XC1?XBXO3 (X represents a real number equal to or greater than 0 and smaller than 1), so as to be in contact with an active material aggregate including a communication hole between active material particles, is included. In a case where the solid electrolyte is melted, the solid electrolyte is heated in a range of 650 degrees to 900 degrees.

Abstract: A solid electrolyte which reduces grain boundary resistance and exhibits a high total ion conductivity is provided. The solid electrolyte includes a first area which has a cubic garnet type crystalline and a second area which is amorphous, around the first area, in which each of the first area and the second area contains a composite oxide represented by formula (1) or (2) as a forming material, and an abundance ratio of metal atoms each having an ionic radius of 78 pm or more gradually increases from the first area to the second area. Li7+xLa3?xZr2AxO12??(1) [In formula (1), A is at least one selected from the group consisting of Mg, Ca, Sr, and Ba. In addition, x is 0.1 or more and 0.6 or less.] Li7La3?xZr2BxO12??(2) [In formula (2), B is at least one selected from the group consisting of Sc and Y. In addition, x is 0.1 or more and 0.6 or less.

Abstract: A solid electrolyte capable of securing grain boundary resistance even when firing is performed at a relatively low temperature and a battery using the solid electrolyte are provided. The solid electrolyte includes a first electrolyte which contains a lithium composite metal compound, and a second electrolyte which contains Li and at least two kinds of metal elements selected from group 5 elements in period 5 or higher or group 15 elements in period 5 or higher.

Abstract: A solid electrolyte capable of securing grain boundary resistance even when sintering is performed at a relatively low temperature and a lithium ion battery using the solid electrolyte are provided. The solid electrolyte includes a first electrolyte which contains a lithium composite metal compound containing one kind of first metal element selected from group 13 elements in period 3 or higher, and a second electrolyte which contains Li and at least two kinds of second metal elements selected from group 5 elements in period 5 or higher or group 15 elements in period 5 or higher.

Abstract: A manufacturing method of an electrode assembly capable of easily manufacturing a configuration in which an electrolyte and an active material are bonded to each other is provided. A step of supplying, solidifying, and crystallizing a solid electrolyte 22 including Li2+XC1?XBXO3 (X represents a real number equal to or greater than 0 and smaller than 1), so as to be in contact with an active material aggregate 12 including a communication hole 14 between active material particles 13, is included. In a case where the solid electrolyte 22 is melted, the solid electrolyte 22 is heated in a range of 650 degrees to 900 degrees.

Abstract: A lithium battery as a secondary battery has a battery cell including a first current collector which has a first face and a second face, a positive electrode active material particle which pierces the first current collector and is exposed from the first face and the second face, an electrolyte layer which covers the positive electrode active material particle exposed from the first face and the second face of the first current collector, a negative electrode as an electrode which is in contact with the electrolyte layer, and a second current collector which is in contact with the negative electrode. The battery cell is hermetically enclosed in a package in a state where one end portion which is a portion of the first current collector is exposed.

Abstract: A composite body includes an electrolyte which contains Li, La, Zr, O, and Ga; and an active material coated with barium titanate (BaTiO3) or lithium niobate (LiNbO3).

Abstract: An active material includes a first oxide that is a composite metal oxide containing lithium and one or more types of elements selected from the group consisting of nickel, manganese, and cobalt, and a second oxide represented by the following formula (1), wherein the second oxide is formed in portions of a surface and an inside of the first oxide: LipNixMn2?x?yCOyO2?qFq (1). In the formula (1), p, q, x, and y are real numbers satisfying 0.98?p?1.07, 0<q?0.35, 0?x?1, and 0?y?1, respectively.

Abstract: A lithium battery as a secondary battery includes a positive electrode composite material containing a solid electrolyte and a positive electrode active material containing lithium, a negative electrode as an electrode provided at one face of the positive electrode composite material, and a current collector provided at another face of the positive electrode composite material, wherein the solid electrolyte is a garnet-type fluorine-containing lithium composite metal oxide that is represented by the following compositional formula (1) or (2) and that conducts lithium. (Li7?3xGax) (La3?yNdy)Zr2O12?zFz ??(1) (Li7?3x+yGax) (La3?yCay) Zr2O12?zFz ??(2) Provided that 0.1?x?1.0, 0<y?0.2, and 0<z?1.0.

Abstract: A composition for forming a lithium reduction resistant layer includes a solvent, and a lithium compound, a lanthanum compound, a zirconium compound, and a compound containing a metal M, each of which shows solubility in the solvent, and in which with respect to the stoichiometric composition of a compound represented by the general formula (I), the lithium compound is contained in an amount 1.05 times or more and 2.50 times or less, the lanthanum compound and the zirconium compound are contained in an amount 0.70 times or more and 1.00 times or less, and the compound containing a metal M is contained in an equal amount.

Abstract: A secondary battery according to the present disclosure includes a solid electrolyte portion containing a lithium composite metal oxide represented by the following compositional formula (1), and current collectors disposed opposite to each other through the solid electrolyte portion: Li7-xLa3Zr2?(x+y)MaxMbyO12??(1) provided that 0.5<x+y<1.2 and (ix+jy)+4(x+y)>8 wherein i is an oxidation number of Ma and j is an oxidation number of Mb are satisfied, and Ma represents one or more types of Sb, Bi, Ce, Mn, V, Te, Tc, and Sn, and Mb represents one or more types of Nb, Cr, Mo, W, Ta, and Ti.

Abstract: An electrolyte according to the invention includes a crystalline first electrolyte portion which contains a lithium composite metal oxide represented by the compositional formula (1). (Li7?3xGax)(La3?yNdy)Zr2O12??(1) In the formula, x and y satisfy the following formulae: 0.1?x?1.0 and 0.01?y?0.2.