Toyota Jidosha Kabushiki Kaisha

Takamasa Ohtomo

Yuki Kato

Shigenori Hama

Koji Kawamoto

Hisatsugu Yamasaki

Masatsugu Kawakami

Yasushi Tsuchida

Ryoji Kanno

Masahiro Tatsumisago

Hiroshi Nagase

Akitoshi Hayashi

Masaaki Hirayama

Shinya Shiotani

Noriaki Nishino

Fuminori Mizuno

A solid-state battery includes: a first current collector layer having a first current collector tab protruding from one side of a quadrilateral; a first active material layer laminated on the first current collector layer; a second current collector layer having a second current collector tab protruding from one side of a quadrilateral; a second active material layer laminated on the second current collector layer; and a solid electrolyte layer arranged between the first active material layer and the second active material layer and including a polymer electrolyte, wherein, in three sides other than the one side where the first current collector tab is arranged, the solid electrolyte layer is arranged so as to cover end surfaces of the first current collector layer and the first active material layer.

Solid-state battery

A method of producing a sulfide solid electrolyte material includes: forming an intermediate having crosslinking sulfur but no LiS, by vitrifying, in a first vitrification process, a starting material composition obtained by mixing LiS and a sulfide of a group 14 or group 15 element such that a proportion of LiS with respect to the sum total of the LiS and the sulfide of a group 14 or group 15 element is smaller than a proportion of LiS required for the sulfide solid electrolyte material to obtain an ortho composition; and eliminating the crosslinking sulfur by vitrifying, in a second vitrification process, an intermediate-containing composition resulting from mixing a bond cleaving compound, which cleaves a bond of the crosslinking sulfur, with the intermediate.

Method of producing a sulfide solid electrolyte material, sulfide solid electrolyte material, and lithium battery

The present invention aims to provide a sulfide solid electrolyte material with favorable ion conductivity, in which charge and discharge efficiency may be inhibited from decreasing. The object is attained by providing a sulfide solid electrolyte material, including: a Li element; a P element; and a S element, characterized in that the material has a peak at a position of 2&#x3b8;=30.21&#xb0;&#xb1;0.50&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; ray, and the sulfide solid electrolyte material does not substantially include a metallic element belonging to the third group to the sixteenth group.

Sulfide solid electrolyte material, battery, and producing method for sulfide solid electrolyte material

An object of the present invention is to provide a sulfide solid electrolyte material having satisfactory ion conductivity. In the present invention, the above object is solved by providing a sulfide solid electrolyte material comprising a Li element, a Si element, a P element, a S element, and an X element (in which X represents at least one of F, Cl, Br and I), the sulfide solid electrolyte material having a crystal phase B having a peak at the position of 2&#x3b8;=30.12&#xb0;&#xb1;1.00&#xb0; measured by X-ray diffractometry using CuK&#x3b1; ray.

Sulfide solid electrolyte material, battery, and method for producing sulfide solid electrolyte material

An all-solid-state battery that makes it possible to improve the cycling properties is provided. The all-solid-state battery includes an anode; a cathode; a solid electrolyte layer that is arranged between the anode and the cathode; an anode collector that is connected to the anode; and a cathode collector that is connected to the cathode. In the all-solid-state battery, a metal layer is arranged between the anode and the anode collector and/or between the cathode and the cathode collector, and metal that does not undergo an electrochemical reaction with metal ions under a potential environment where an active material stores and releases the metal ions, and whose percent elongation is no less than 22% is used for the metal layer.

All-solid-state battery

The main object of the present invention is to provide a sulfide solid electrolyte material with high Li ion conductivity. The present invention solves the problem by providing a sulfide solid electrolyte material comprising an ion conductor with an ortho-composition, and LiI, characterized in that the sulfide solid electrolyte material is glass with a glass transition point.

Sulfide solid electrolyte material and lithium solid state battery

A problem of the present invention is to provide a lithium solid battery in which generation of short-circuits caused by dendrite is inhibited. The present invention solves the problem by providing a lithium solid battery comprising a solid electrolyte layer having a sulfide glass containing an ion conductor which has a Li element, a P element and a S element, and having an average pore radius calculated by mercury press-in method being 0.0057 &#x3bc;m or less.

Lithium solid battery, lithium solid battery module, and producing method for lithium solid battery

A main object of the present invention is to provide a method for producing a cathode active material for a solid state battery, which is capable of reducing resistance. The present invention solves the problem by providing a method for producing a cathode active material for a solid state battery comprising steps of: a coating step of coating a coating material represented by LiPO(2&#x2264;x&#x2264;4, 3&#x2264;y&#x2264;5) on a surface of a cathode active material containing an Ni element and being an oxide by using a sputtering method; and a heat-treating step of forming a coating portion in such a manner that the cathode active material coated with the coating material is heat-treated within a range of 400&#xb0; C. to 650&#xb0; C. to diffuse the Ni element into the coating material.

Method for producing cathode active material for solid state battery

An object of the present invention is to provide a solid lithium secondary battery in which occurrence of short-circuit is suppressed during charging. The object is attained by providing a solid lithium secondary battery comprising an anode current collector, a solid electrolyte layer, a cathode active material layer, and a cathode current collector in this order, wherein the solid electrolyte layer is provided on a surface of the anode current collector, the solid electrolyte layer contains a sulfide solid electrolyte particle, a surface shape of the solid electrolyte layer, which faces the anode current collector, is formed in correspondence with a surface shape of the anode current collector, and 10-point average roughness (R) of the surface of the anode current collector on a solid electrolyte layer side, and 10-point average roughness (R) of a surface of the solid electrolyte layer on an anode current collector side are in a range of 1.8 &#x3bc;m to 2.5 &#x3bc;m, respectively.

Solid lithium secondary battery and method of manufacturing same

A method of producing an active material powder includes (i) an attachment step of obtaining a powder including an active material particle, which stores and releases lithium ions at a potential of 4.5 V or higher based on Li, and a coating layer precursor, which is attached to a surface of the active material particle, by attaching an alkoxide solution containing lithium ions and niobium ions to the surface of the active material particle and drying the attached alkoxide solution; and (ii) a heating step of forming a coating layer on the surface of the active material particle by heating the powder obtained in the attachment step to be within a temperature range of 120&#xb0; C. to 200&#xb0; C.

Method of producing an active material powder

Provided is an all solid state battery system with a high energy density. The all solid state battery system comprises an all solid state battery, and a discharging control unit that controls discharging of the all solid state battery, a cathode active material layer contains a cathode active material particle, and a sulfide solid electrolyte particle, and a ratio (T/t) of an actual thickness 'T' of the cathode active material layer to an effective thickness 't' of the cathode active material layer which is calculated by the following Expression satisfies a relationship of 0.01&#x2266;T/t&#x2266;0.15;(in which, V represents an operation voltage width (V), i represents a current density (mA/cm) during discharging, and &#x3ba;' represents effective Li ion conductivity (S/cm) of the cathode active material layer).

All solid state battery system

A sulfide solid electrolyte material includes Li, K, Si, P and S elements; a peak at 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; and not having a peak at a position of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; ray, or when a diffraction intensity at the peak of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; is regarded as Iand a diffraction intensity at the peak of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0; is regarded as Ihaving a peak at the position of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0;, a value of I/Iis less than 1; a P element molar fraction (P/(Si+P)) to a Si element total and the P element satisfies 0.5&#x2266;P/(Si+P)&#x2266;0.7, and a K element molar fraction (K/(Li+K)) to a Li element total and the K element satisfies 0&#x3c;K/(Li+K)&#x2266;0.1.

The main object of the present invention is to provide a sulfide solid electrolyte material which copes with both the restraint of the increase in interface resistance and the restraint of the increase in bulk resistance. The present invention solves the above-mentioned problems by providing a sulfide solid electrolyte material characterized by containing at least one of Cl and Br.

Sulfide solid electrolyte material, cathode body and lithium solid state battery

The main object of the present invention is to provide a cathode active material for a lithium battery capable of inhibiting resistance from increasing with time. The present invention attains the object by providing a cathode active material for a lithium battery comprising: a cathode active material containing an Mn element and being an oxide; and a coating portion formed on a surface of the cathode active material, characterized in that the coating portion contains a Li element, a P element, an O element and the Mn element derived from the cathode active material, and a ratio of the Mn element to the P element, (Mn/P) is 1 or more at an interface between the cathode active material and the coating portion.

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Susono, Japan

Takamasa Ohtomo