Murata Manufacturing Co., Ltd.

Ryohei Takano

Makoto Yoshioka

Akisuke Ito

Takeo Ishikura

Kenichi Bando

Osamu Chikagawa

A solid-state battery that includes a negative electrode layer and a solid electrolyte layer. The negative electrode layer contains a negative electrode active material in which a molar ratio of Li to vanadium (V) is 2.0 or more, the solid electrolyte layer contains a solid electrolyte having a lithium super ionic conductor (LISICON)-type structure and containing at least V, and the solid electrolyte contained in the solid electrolyte layer has an average chemical composition represented by (LiA)(VB)O.

Solid-state battery

A solid electrolyte that includes a lithium ion conductive material having a garnet-type structure, a lithium ion conductive material having a LISICON-type structure, and a compound containing Li and B.

Solid electrolyte and all solid state battery

An all-solid-state battery having a positive electrode, a negative electrode having a negative electrode active material layer, and a solid electrolyte layer between the positive electrode and the negative electrode material layer. The negative electrode active material layer contains 60% by volume or more of an oxide having a LISICON-type crystal structure. The solid electrolyte layer contains a solid electrolyte having at least one of an oxide having a garnet-type crystal structure or an oxide having a LISICON-type crystal structure.

All-solid-state battery

A solid electrolyte material that includes a composite oxide containing Li and Bi, and at least one solid electrolyte having a garnet structure, a perovskite structure, and a LISICON structure.

Solid electrolyte material, solid electrolyte layer, and all solid state battery

A solid-state battery including a solid-state battery laminate that includes at least one battery constituent unit including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer along a lamination direction, and defining: an overlapping part in which the positive electrode layer and the negative electrode layer overlap each other in the lamination direction, and a non-overlapping part in which the positive electrode layer and the negative electrode layer do not overlap each other in the lamination direction. At least one main surface having a normal in the lamination direction has a recess overlapping the overlapping part and defines a step between the overlapping part and the non-overlapping part or in the non-overlapping part.

A solid electrolyte having a garnet type crystal structure. The garnet type crystal structure contains Li, La, Zr, O and Ga and at least one element selected from Al, Mg, Zn and Sc.

Solid electrolyte and all-solid battery

A nonpolar all-solid-state battery that includes a first electrode; a second electrode; and a solid electrolyte layer the first electrode and the second electrode. Each of the first electrode and the second electrode includes a first active material and at least one second active material. The first active material functions as both a positive electrode active material and a negative electrode active material. The first active material has a larger specific capacity when functioning as the positive electrode active material than when functioning as the negative electrode active material. In each of the first electrode and the second electrode, a ratio of the first active material to a total amount of the first and second active materials is more than 50% by mass and less than 100% by mass. A mass of each of the first and second active materials is equal between the first electrode and the second electrode.

Nonpolar all-solid-state battery and electronic device

A co-fired all-solid-state battery that includes a negative electrode, a solid electrolyte layer, and a positive electrode. The negative electrode contains a negative electrode active material and a garnet-type solid electrolyte. The negative electrode active material contains Li, V, and O. The negative electrode active material has a mole ratio (Li/V) of a Li content to a V content of 2.0 or more. The garnet-type solid electrolyte contains Li, La, Zr, and O.

Co-fired all-solid-state battery

A NaSICON-type solid-state electrolyte that contains Na as a conducting species, Zr, M, Si, P, and O, where M is at least one element selected from Mg, V, and Nb. The NaSICON-type solid-state electrolyte has a composition in which a molar ratio of M to Zr (M/Zr) is less than 0.2.

Solid-state electrolyte and all-solid-state battery

A solid-state electrolyte having a garnet-type crystal structure represented by the formula (LiA)La(ZrB)O, where A is at least one element selected from Mg, Zn, Al, Ga, and Sc, a is a valence of A, B is at least one element selected from Al, Ga, Sc, Yb, Dy, and Y, x is more than 0 and less than 1.0, y is more than 0 and less than 1.0, and 7&#x2212;ax+y is more than 5.5 and less than 7.0).

A solid electrolyte having a NaSICON-type crystal structure and represented by a general formula LiZrM(PO). In the general formula, Li may be partially substituted with at least one selected from the group consisting of Na, K, Rb, Cs, Ag, and Ca, P may be partially substituted with at least one of B and Si, M contains at least one first element capable of stabilizing or partially stabilizing the tetragonal or cubic crystal structure of a high-temperature phase of ZrO, &#x2212;0.50&#x2264;a&#x2264;2.00, 0.01&#x2264;b&#x2264;1.90, and 0.01&#x2264;c&#x2264;1.90.

Growing community of inventors

Nagaokakyo, Japan

Ryohei Takano