Toyota Jidosha Kabushiki Kaisha

Tokyo Institute of Technology

Takamasa Otomo

Yuki Kato

Koji Kawamoto

Shigenori Hama

Jun Yoshida

Daichi Kosaka

Ryoji Kanno

Tetsuya Waseda

Masaaki Hirayama

Mitsuru Sakano

Hideyuki Nakano

Kunihiro Nobuhara

A main object of the present disclosure is to provide an active material whose volume variation due to charge and discharge is small. The present disclosure achieves the object by providing an active material comprising a primary particle including at least one crystal phase of a Type I silicon clathrate and a Type II silicon clathrate, and the primary particle includes a void inside thereof.

Active material, battery and method for producing active material

A main object of the present disclosure is to provide a battery with excellent capacity. The present disclosure achieves the object by providing a battery comprising a cathode layer, an electrolyte layer, and an anode layer, in this order, and the anode layer includes a silicon clathrate compound, as an anode active material, the silicon clathrate compound has a composition represented by MSi, wherein M is a metal element, x satisfies 0&#x3c;x&#x3c;46, and includes a crystal phase of a Type I silicon clathrate, and an average primary particle size of the silicon clathrate compound is 50 nm or more and 3000 nm or less.

Battery

A main object of the present disclosure is to provide a novel active material of which volume change due to charge and discharge is small. The present disclosure achieves the object by providing a method for producing an active material having a composition represented by NaMSi(M is a metal element other than Na, x and y satisfy 0&#x3c;x, 0&#x2264;y, y&#x2264;x, and 0&#x3c;x+y&#x3c;8), and a silicon clathrate I type crystal phase, the method comprising: a preparing step of preparing a precursor compound having the silicon clathrate I type crystal phase; and a liquid treatment step of bringing the precursor compound into contact with a polar liquid so as to desorb a Na element from the precursor compound and obtain the active material.

Method for producing active material, active material and battery

A main object of the present disclosure is to provide a novel active material whose volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material having a composition represented by NaMSi, wherein M is a metal element other than Na, x and y satisfy 0&#x3c;x, 0&#x2264;y, y&#x2264;x and 0&#x3c;x+y&#x3c;8, and comprising a crystal phase of a Type I silicon clathrate.

Active material and battery

The main object of the present invention is to provide a sulfide solid electrolyte material having favorable ion conductivity and high stability against moisture. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material comprising an Melement (such as Li element), an Melement (such as Ge element, Sn element and P element) and a S element, and having a peak at a position of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; ray, characterized in that when a diffraction intensity at the above-mentioned peak of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; is regarded as IA and a diffraction intensity at a peak of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0; is regarded as IB, a value of IB/IA is less than 0.50, and the Mcontains at least P and Sn.

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

A main object of the present invention is to provide a sulfide solid electrolyte material having favorable ion conductivity and low reduction potential. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material including an Melement (such as a Li element), an Melement (such as a Ge element, a Si element and a P element) and a S element, wherein the material has a peak at a position of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; line; and 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 a peak of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0; is regarded as I, a value of I/Iis less than 0.50, and Mcontains at least P and Si.

The object of the present invention is to provide a battery system in which reductive decomposition of a Ge-containing solid electrolyte material is restricted. The present invention attains the object by providing a battery system including a battery and a control apparatus, wherein the battery has a cathode active material layer containing a cathode active material, an anode active material layer containing a Si-containing anode active material, and an electrolyte layer formed between the cathode active material layer and the anode active material layer, at least one of the anode active material layer and the electrolyte layer contains a Ge-containing solid electrolyte material, and the control apparatus is an apparatus to control an electric potential of the Si-containing anode active material so as to be reduction potential or less of the Ge-containing solid electrolyte material.

Battery system, method for producing battery system, and battery control apparatus

A main object of the present invention is to provide a solid electrolyte material having excellent electron conductivity. The present invention solves the problem by providing the solid electrolyte material including: a solid electrolyte particle; and a carbon coating layer formed on a surface of the solid electrolyte particle.

Solid electrolyte material, solid state battery, and method for producing solid electrolyte material

The object of the present invention is to provide a sulfide solid electrolyte material with favorable ion conductivity. The present invention attains the object by providing a sulfide solid electrolyte material including an Melement (such as a Li element), an Melement (such as a Ge element and a P element), a S element and an O element, and having a peak at a position of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; in an X-ray diffraction measurement using a CuK&#x3b1; ray, characterized in that 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 a peak of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0; is regarded as I, a value of I/Iis less than 0.50.

A method for producing a sulfide solid electrolyte material having a small amount of hydrogen sulfide generation and a high Li ion conductivity. To achieve the above, a method for producing a sulfide solid electrolyte material is provided, including steps of: a providing step for providing a crystallized sulfide solid electrolyte material prepared by using a raw material composition containing LiS and PS; and an amorphizing step for applying amorphization treatment to the crystallized sulfide solid electrolyte material.

Method for producing sulfide solid electrolyte material and method for producing lithium solid state battery

An object of the present invention is to provide a sulfide solid electrolyte glass producing a tiny amount of hydrogen sulfide. The present invention attains the above-mentioned object by providing a sulfide solid electrolyte glass including LiPS, characterized in that LiPSis not detected byP NMR measurement and the content of LiS as determined by XPS measurement is 3% by mol or less.

Sulfide solid electrolyte glass, method for producing sulfide solid electrolyte glass, and lithium solid state battery

The problem of the present invention is to provide a sulfide solid electrolyte material having excellent ion conductivity. The present invention solves the problem by providing a sulfide solid electrolyte material comprising an Melement (such as a Li element), an Melement (such as a Ge element and a P element), and an S element; having a peak in a position of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; in an X-ray diffraction measurement using a CuK&#x3b1; line; and having an I/Ivalue of less than 0.50 when a diffraction intensity at the peak of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; is represented by Iand a diffraction intensity at a peak of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0; is represented by I.

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Susono, Japan

Takamasa Otomo