Panasonic Intellectual Property Management Co., Ltd.

Kazufumi Miyatake

Takashi Kubo

Akihiro Sakai

Tetsuya Asano

Yusuke Nishio

Akihiro Horikawa

Motohiro Okochi

Toshifumi Nagino

Keita Mizuno

Toshiyuki Kojima

Shuzo Tsuchida

Kazuto Fukuda

Motoi Hatanaka

Kota Nakahira

The solid electrolyte material of the present disclosure includes Li, Ca, Y, Sm, X, and O, where X is at least one selected from the group consisting of F, Cl, Br, and I; and the molar ratio of O to the sum of Y and Sm in a surface area of the solid electrolyte material is higher than the molar ratio of O to the sum of Y and Sm in the entire solid electrolyte material.

Solid electrolyte material and battery using same

A production method for producing a halide, the method includes a heat treatment step of heat-treating a mixed material containing (NH)Yα, (NH)Smβ, Liγ, and Caδin an inert gas atmosphere, wherein α, β, γ, and δ are each independently at least one selected from the group consisting of F, Cl, Br, and I, and the following three formulas: 0≤a≤3, 0≤b≤3, and 0<a+b≤6, are satisfied.

Method for producing halide

A solid electrolyte composition according to the present disclosure includes a halide solid electrolyte material and an organic solvent. The halide solid electrolyte material has an average particle size of less than or equal to 1 μm. The organic solvent consists of at least one selected from the group consisting of a compound having a functional group and a hydrocarbon. The functional group includes at least one selected from the group consisting of an ether group and a halogen group.

Solid electrolyte composition and solid electrolyte particles

A solid-electrolyte material includes Li, Y, O, and X. X is at least two elements selected from the group consisting of F, Cl, Br, and I. O is present in a surface region of the solid-electrolyte material.

The production method of the present disclosure includes heat-treating a material mixture containing a compound containing Y, a compound containing Sm, NHα, Liβ, and Caγin an inert gas atmosphere. The compound containing Y is at least one selected from the group consisting of YOand Yδ, and the compound containing Sm is at least one selected from the group consisting of SmOand Smε. The material mixture contains at least one selected from the group consisting of YOand SmO, and α, β, γ, δ, and ε are each independently at least one selected from the group consisting of F, Cl, Br, and I.

A solid-electrolyte material includes Li, Y, X, O, and H. X is at least two elements selected from the group consisting of F, Cl, Br, and I.

A solid-electrolyte material includes Li, Y, O, and X. X is at least two elements selected from the group consisting of F, Cl, Br, and I.

Solid-electrolyte material and battery including the same

A solid-state battery that exhibits improved battery performance includes: a positive-electrode collector; a negative-electrode collector; a positive electrode layer formed on the positive-electrode collector and containing a positive-electrode active material and a solid electrolyte; a negative electrode layer formed on the negative-electrode collector and containing a negative-electrode active material and a solid electrolyte; and a solid electrolyte layer disposed between the positive electrode layer and the negative electrode layer and containing a solid electrolyte. At least one of the solid electrolyte and the solid electrolyte partly represents a porous solid electrolyte.

Solid-state battery and method of manufacture thereof

An all-solid-state battery includes: a positive electrode layer including a positive electrode current collector and a positive electrode mixture layer; a negative electrode layer including a negative electrode current collector and a negative electrode mixture layer; and a solid electrolyte layer. The solid electrolyte layer is disposed between the positive electrode mixture layer and the negative electrode mixture layer. A weight per unit area of a first portion of the negative electrode mixture layer overlapping the positive electrode mixture layer on a stacking axis is greater than a weight per unit area of a second portion of the negative electrode mixture layer not overlapping the positive electrode mixture layer on the stacking axis.

All-solid-state battery

An all-solid battery includes a positive-electrode layer, a negative-electrode layer, and a solid electrolyte layer. The positive-electrode layer includes a positive-electrode current collector, a positive-electrode bonding layer containing at least a conductive agent comprising non-metal and formed on the positive-electrode current collector, and a positive-electrode mixture layer containing at least a positive-electrode active material and a solid electrolyte and formed on the positive-electrode bonding layer. The negative-electrode layer includes a negative-electrode current collector and a negative-electrode mixture layer containing at least a negative-electrode active material and the solid electrolyte. The solid electrolyte layer is disposed between the positive-electrode mixture layer and the negative-electrode mixture layer and contains the solid electrolyte. A concentration of a binder contained in the positive-electrode mixture layer is less than or equal to 100 ppm and a concentration of a solvent contained in the positive-electrode mixture layer is less than or equal to 50 ppm.

All-solid battery and method of manufacturing the same

An all-solid-state battery includes: a positive electrode layer including a positive electrode current collector and a positive electrode mixture layer; a negative electrode layer including a negative electrode current collector and a negative electrode mixture layer; and a solid electrolyte layer. The solid electrolyte layer is disposed between the positive electrode mixture layer and the negative electrode mixture layer. On a plane perpendicular to a stacking axis, an area of the negative electrode mixture layer is larger than an area of the positive electrode mixture layer. On the stacking axis, an entire portion of the positive electrode mixture layer overlaps a portion of the negative electrode mixture layer.

An all-solid battery includes a positive-electrode layer having a positive-electrode current collector and a positive-electrode mixture layer, a negative-electrode layer having a negative-electrode current collector and a negative-electrode mixture layer, and a solid electrolyte layer. The positive-electrode mixture layer contains a positive-electrode active material and a solid electrolyte. The solid electrolyte layer is disposed between the positive-electrode mixture layer and the negative-electrode mixture layer. In the positive-electrode mixture layer, the active material volume proportion is larger and the porosity is smaller in a portion closer to the positive-electrode current collector than in a portion far from the positive-electrode current collector.

All-solid battery

A heating roll press machine according to the present disclosure includes a pair of rollers and a preheating unit that preheats a processing object before the processing object is conveyed to the pair of rollers. The preheating unit preheats the processing object so that a temperature distribution differs according to positions in a width direction of the processing object to reduce a temperature difference in the width direction of the processing object after the processing object passes through the pair of rollers each having a temperature difference between a roller central part and roller end parts.

Heating roll press machine and heating roll press method

A lithium-ion secondary battery that includes an electricity-generating unit that includes: a positive electrode having a positive electrode collector, and a positive electrode mixture layer formed on a surface of the positive electrode collector; a negative electrode having a negative electrode collector, and a negative electrode mixture layer formed on a surface of the negative electrode collector; and a separator disposed between the positive electrode and the negative electrode. At least one of the positive electrode mixture layer and the negative electrode mixture layer has a high-density portion of high mixture density, and a low-density portion having a lower mixture density than the high-density portion and being in contact with the high-density portion. The low-density portion has a smaller area than the high-density portion when viewed in plan.

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Osaka, Japan

Kazufumi Miyatake