Toyota Jidosha Kabushiki Kaisha

Kyushu University

Tetsuya Waseda

Hiroki Nagai

Jun Yoshida

Mitsutoshi Otaki

Ryo Suzuki

Daichi Kosaka

Takamasa Otomo

Yasuhito Kondo

Hiroshi Nozaki

Hiroyuki Kawaura

Takeshi Abe

Shigeto Okada

Jun-ichi Yamaki

Yoshitomo Takebayashi

Takayuki Uchiyama

Satoshi Wakasugi

Motoshi Isono

Takumi Tamaki

Masaki Adachi

Hideyuki Nakano

Shizuka Masuoka

Jun-Ichi Yamaki

An all-solid-state battery including a cell laminate including two or more unit cells, and a resin layer covering a side surface of the cell laminate, wherein each unit cell includes a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer laminated in this order, at least one of the positive electrode current collector layer, positive electrode active material layer, solid electrolyte layer, negative electrode active material layer, and negative electrode current collector layer includes extending parts which extend more outwardly from the side surface of the cell laminate than the other layers, and gaps are formed between the extending parts, and the ratio of the compressive modulus of the resin layer to the compressive modulus of the cell laminate is 0.4 or less.

All-solid-state battery and production method therefor

The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.

Manufacturing method of porous silicon material, porous silicon material, and power storage device

A main object of the present disclosure is to provide a method for producing an active material wherein a volume variation due to charge/discharge is reduced. The present disclosure achieves the object by providing a method for producing an active material, the method comprising steps of: a preparing step of preparing a LiSi precursor including a Si element and a Li element, and a void forming step of forming a void by extracting the Li element from the LiSi precursor by using a Li extracting solvent, and the LiSi precursor includes a crystal phase of LiSi.

Method for producing active material

A main object of the present disclosure is to provide an anode active material whose volume variation due to charging and discharging is small. The present disclosure achieves the object by providing an anode active material comprising a primary particle including a Si phase, an MSi phase that is a silicide phase wherein M is a transition metal element, and a first void.

Anode active material and battery

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

An all-solid-state battery includes an all-solid-state battery laminate including at least one all-solid-state unit cell in which a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer are laminated in this order, and a resin layer covering a side surface of the all-solid-state battery laminate, wherein the resin layer has a multi-layer structure including a first resin layer and a second resin layer in this order from the side in the vicinity of the side surface of the all-solid-state battery laminate, and wherein the elastic modulus of the first resin layer is lower than the elastic modulus of the second resin layer.

All-solid-state 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

[Object] To provide an all-solid-state battery including an all-solid-state battery laminate which is covered with a resin layer, in which cracking of the resin layer due to changes in volume of the all-solid-state battery laminate can be prevented. [Solution To Problem] Provided is an all-solid-state battery, including an all-solid-state battery laminate including at least one all-solid-state unit cell obtained by laminating a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer in this order, and a resin layer, wherein the resin layer covers at least the side surfaces of the all-solid-state battery laminate, and a cavity is present between the side surfaces of at least the negative electrode active material layer and the resin layer.

The present teaching provides a nonaqueous electrolytic solution secondary battery in which both a satisfactory high-rate characteristic and a high cycle characteristic (prevention of decrease in capacity) are realized. The nonaqueous electrolytic solution secondary battery of the present teaching includes a positive electrode provided with a positive electrode active material layer, a negative electrode provided with a negative electrode active material layer, and a nonaqueous electrolytic solution. The negative electrode active material layer includes a negative electrode active material and carbon black. A coating film made of a lithium transition metal composite oxide having lithium ion conductivity is formed on at least part of a surface of the carbon black.

Nonaqueous electrolytic solution secondary battery

Electrode active material that is used together with an electrolyte solution having an electrolyte decomposition potential Ve is represented by the general expression LixFeMyO2 and is amorphous. In the expression, x and y are values which independently satisfy 1&#x3c;x&#x2266;2.5 and O&#x3c;y&#x2266;3, respectively, and z=(x+(valence of Fe)+(valence of M)&#xd7;y)/2 to satisfy stoichiometry, and M represents one or two or more types of glass former element. The average electronegativity of M is less than (Ve+6.74/5.41.

Growing community of inventors

Susono, Japan

Tetsuya Waseda