Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jidoshokki

Aisin Seiki Kabushiki Kaisha

Daichi Kosaka

Jun Yoshida

Norihiro Ose

Hajime Hasegawa

Kengo Haga

Takamasa Otomo

Kazuhito Kato

Tetsuya Waseda

Tomoharu Sasaoka

Kazuhiro Suzuki

Shinji Nakanishi

Masanori Harata

Keisuke Omori

Hideyuki Nakano

Masakazu Murase

Mitsutoshi Otaki

Tomoya Suzuki

Yoshihiro Ikushima

Yasuaki Tahara

Masato Hozumi

Masaya Michishita

Noriaki Nonaka

Atsushi Kajikawa

Tatsuya Eguchi

Jun Mikami

Yoshifumi Ashihara

Satori Ito

Provided is a negative electrode active material that contains silicon clathrate II and that is suitable for a negative electrode of a lithium ion secondary battery. The negative electrode active material includes a silicon material in which silicon clathrate II represented by composition formula NaSi(0&#x2264;x&#x2264;10) is contained and a volume of a pore having a diameter of not greater than 100 nm is not less than 0.025 cm/g.

Negative electrode active material containing silicon clathrate II

Provided is a novel production method for producing silicon clathrate II. In the production method for producing silicon clathrate II, in a reaction system in which a Na&#x2014;Si alloy containing Na and Si and an Na getter agent coexist so as not to be in contact with each other, the Na&#x2014;Si alloy is heated and Na evaporated from the Na&#x2014;Si alloy is thus caused to react with the Na getter agent to reduce an amount of Na in the Na&#x2014;Si alloy.

Production method for producing silicon clathrate II

When a layered rock-salt type cathode active material and a sulfide solid electrolyte are mixed to be a cathode mixture, and an all solid-state battery is obtained using this mixture, oxygen is released from the cathode active material when the battery is charged, and the sulfide solid electrolyte is oxidized, increasing the battery internal resistance. To increase the concentration of cobalt inside the active material, and at the same time to lower the concentration of cobalt of the surface of the cathode active material, to suppress oxygen release in charging, specifically, a cathode mixture includes: a cathode active material; and a sulfide solid electrolyte, wherein the cathode active material has a layered rock-salt crystal phase, and is made of a composite oxide containing Li, Ni, Co, and Mn, and the concentration of cobalt inside the cathode active material is higher than that of a surface of the cathode active material.

Cathode mixture for all solid-state battery, cathode for all solid-state battery, all solid-state battery, and method for producing the same

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

A method of manufacturing an all-solid-state battery includes a lamination step of laminating a deactivated lithium-containing negative electrode active material layer containing deactivated lithium, a solid electrolyte layer for the all-solid-state battery, and a positive electrode active material layer for the all-solid-state battery such that the solid electrolyte layer for the all-solid-state battery is disposed between the deactivated lithium-containing negative electrode active material layer and the positive electrode active material layer for the all-solid-state battery.

Method of manufacturing all-solid-state battery

A lubricating structure for a speed reducer includes: a case; a first reduction gear pair provided inside the case; a second reduction gear pair provided inside the case; a first catch tank arranged inside the case; a second catch tank arranged inside the case; a partition member that includes a partition wall that partitions an inside of the case into a first accommodation space in which the first reduction gear pair is accommodated and a second accommodation space in which the second reduction gear pair is accommodated; a first oil passage communicating with the first accommodation space and configured to guide lubricating oil to the first catch tank; a second oil passage communicating with the second accommodation space and configured to guide lubricating oil to the second catch tank; and a communication port provided in the partition member and communicating the first oil passage with the second oil passage.

Lubricating structure for speed reducer

An all-solid battery having stacked therein, in order, a positive electrode laminate, an intermediate solid electrolyte layer, and a negative electrode laminate is manufactured by a first pressing step (i) of applying pressure to the positive electrode laminate, a second pressing step (ii) of applying pressure to the negative electrode laminate, and a third pressing step (iii) of applying pressure to the positive electrode laminate, the intermediate solid electrolyte layer, and the negative electrode laminate.

Method for manufacturing all-solid battery

A solid-state battery comprising a stack including at least one unit cell including a positive electrode layer including a positive electrode active material, a negative electrode layer including a negative electrode active material, and a solid electrolyte layer laminated between the positive and negative electrode layers, and an outer covering accommodating the stack, wherein the solid-state battery further including a pressure receiving member provided on at least a part of a periphery of the outer covering, and wherein the pressure receiving member has a thickness of less than a total thickness of the stack and the outer covering in a stacking direction of the unit cell.

Solid-state battery and method for producing the same, and assembled battery and method for producing the same

A manufacturing method of an all-solid battery includes fabricating a single battery including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer arranged between the positive electrode layer and the negative electrode layer; fabricating a plurality of battery packs including the plurality of single batteries; confining a plurality of battery packs by an equal confining pressure; measuring the electrical characteristics of the plurality of confined battery packs; determining the battery pack whose measured electrical characteristics are the worst of the plurality of battery packs; reducing the confining pressures of the other battery packs so that the electrical characteristics of the other battery packs are equal to that of the battery pack whose electrical characteristics have been determined to be the worst; and electrically connecting in parallel the battery packs.

Manufacturing method of all-solid battery

An objective of the present invention is to provide a charging system, capable of increasing the rapid charging capacity of an on-vehicle all-solid-state battery, and reducing the effect of confining pressure on the all-solid-state battery. This is achieved by a charging system for an all-solid-state battery to be mounted in a vehicle, the charging system comprising: a charging section that charges an all-solid-state battery, a pressing section that applies confining pressure to the all-solid-state battery, and a pressure control section that controls the confining pressure, wherein the pressure control section directs the pressing section so that the confining pressure during charging is higher than the confining pressure during discharging.

Growing community of inventors

Susono, Japan

Daichi Kosaka