Seiko Epson Corporation

Tsutomu Teraoka

Tomofumi Yokoyama

Hitoshi Yamamoto

Ken Ikuma

Yoshihiro Ueno

Hirofumi Hokari

Masahiro Oki

Naoyuki Toyoda

Masahide Nakamura

Tomoyuki Okuyama

Masahiro Fukazawa

Sukenori Ichikawa

Kenichi Numakura

A precursor solution of a garnet-type solid electrolyte is provided that is represented by the following compositional formula, and contains one type of solvent, and a lithium compound, a lanthanum compound, a zirconium compound, a gallium compound, and a neodymium compound, each of which has solubility in the solvent, wherein with respect to the stoichiometric composition of the following compositional formula, the amount of the lithium compound is 1.05 times or more and 1.30 times or less, and the amounts of the lanthanum compound, the zirconium compound, the gallium compound, and the neodymium compound are equal,(LiGa)(LaNd)ZrOprovided that the following relationships are satisfied: 0.1≤x≤1.0 and 0.0<y≤0.2.

Precursor solution of garnet-type solid electrolyte, method for producing precursor solution of garnet-type solid electrolyte, and garnet-type solid electrolyte

A solid electrolyte according to the present disclosure is represented by the following compositional formula (1).LiLa(ZrWM)O  (1) In the formula (1), x and z satisfy 0.10≤x≤0.60 and 0.00<z≤0.25, and M is at least one type of element selected from the group consisting of Nb, Ta, and Sb.

Solid electrolyte, method for producing solid electrolyte, and composite body

A positive electrode active material composite body according to the present disclosure includes a positive electrode active material containing a transition metal element and having a particulate shape, and an ion conductor provided in contact with a surface of the positive electrode active material, wherein the ion conductor is constituted by a material containing Li, Zr, and M which is at least one type of element selected from the group consisting of Nb, Sb, and Ta, the transition metal element is partially diffused in the ion conductor, and an average decrease ratio of a content ratio of the transition metal element until a point where the content ratio of the transition metal element in the ion conductor to be determined by a characteristic X-ray has reached 12% of the content ratio of the transition metal element at an interface between the positive electrode active material and the ion conductor based on a substance amount is 0.5% or more and 6.1% or less per 1 nm thickness from the interface.

Positive electrode active material composite body

The solid electrolyte according to an embodiment of the present disclosure is represented by the following formula (1):LiLa(ZrGeM)O  (1)

Solid electrolyte, method for producing solid electrolyte, and composite

A solid electrolyte represented by the following formula (1): Li(LaBa)(ZrM)O(1), wherein 0.20≤x<1.50, 0.00<y<0.30, and M is two or more elements selected from the group consisting of Nb, Ta, and Sb.

A solid electrolyte according to the present disclosure is represented by the following compositional formula (1).Li(LaY)(ZrM)O&#x2003;&#x2003;(1) In the formula (1), x and z satisfy 0.00&#x3c;x&#x3c;1.10, and 0.00&#x3c;z&#x2264;0.15, and M is two or more types of elements selected from the group consisting of Nb, Ta, and Sb.

The solid electrolyte according to an embodiment of the present disclosure is represented by the following formula (1):LiLa(ZrInM)O&#x2003;&#x2003;(1)

A solid electrolyte according to the present disclosure is represented by the following compositional formula (1).Li(LaSr)(ZrM)O&#x2003;&#x2003;(1) In the formula (1), x and y satisfy 0.20&#x2264;x&#x3c;1.50 and 0.00&#x3c;y&#x3c;0.30, and M is two or more types of elements selected from the group consisting of Nb, Ta, and Sb.

A solid electrolyte according to the present disclosure is represented by the following compositional formula (1).Li(LaBi)ZrO&#x2003;&#x2003;(1) In the formula (1), x satisfies 0.05&#x3c;x&#x3c;0.40.

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 crystalline.

Electrode composite body, method of manufacturing electrode composite body, and lithium battery

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.

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 electrolyteincluding LiCBO(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 aggregateincluding a communication holebetween active material particles, is included. In a case where the solid electrolyteis melted, the solid electrolyteis heated in a range of 650 degrees to 900 degrees.

Manufacturing method of electrode assembly

An electrode complex includes: a complex which includes a porous active material molded body which is formed by being three-dimensionally connected with a plurality of particulate active material particles containing a lithium double oxide and a plurality of particulate noble metal particles containing a noble metal with a melting point of 1000&#xb0; C. or higher and includes a communication hole, and a solid electrolyte layer formed on the surface of the active material molded body containing the communication hole of the active material molded body; and a current collector which is provided by being bonded to the active material molded body on one surface of the complex.

Electrode complex, method of producing electrode complex, and lithium battery

A manufacturing method of an electrode assembly includes forming an active material molded body which contains lithium double oxide and includes plural voids, forming a solid electrolyte in the plural voids, and attaching a polymer gel film impregnated with an electrolytic solution for conducting lithium ions to the active material molded body in which the solid electrolyte is formed.

Manufacturing method of electrode assembly, electrode assembly and battery

A manufacturing method of an electrode assembly includes: forming an active material compact containing a lithium double oxide and having a plurality of voids; forming a first solid electrolyte in the plurality of voids; impregnating a precursor solution of a second amorphous solid electrolyte conducting lithium ions with an active material compact in which the first solid electrolyte is formed; and performing heat treatment of the active material compact with which the precursor solution is impregnated and forming a second solid electrolyte in the plurality of voids.

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Matsumoto, Japan

Tsutomu Teraoka