Toyota Jidosha Kabushiki Kaisha

Nichia Corporation

Keisuke Omori

Hajime Hasegawa

Norihiro Ose

Mitsutoshi Otaki

Kengo Haga

Hiroki Ishida

Tsuyoshi Ito

Daichi Kosaka

Masato Hozumi

Hiroki Kubo

Ichiro Shibata

Akiji Hayashi

Tomoya Suzuki

Kazuhito Kato

Satomi Yamamoto

Takeshi Tojigamori

Hideki Yoshida

Masashi Kodama

Takumi Tanaka

Yuichi Hashimoto

Hideyuki Koga

Masato Sonoo

Hikaru Aso

Junichiro Nishino

Yuuki Maeda

An all solid state battery in which shift in positions of a plurality of a cell unit arranged along a thickness direction can be prevented is provided. The all solid state battery includes a plurality of the cell unit connected in series. The all solid state battery includes a cell unit A and a cell unit B, a second current collector AY in the cell unit A and a second current collector BX in the cell unit B are arranged to face each other interposing a first insulating portion, and a tab AX, a tab AY, and a tab B are fixed by a fixing member.

All solid state battery

A cathode active material with high durability and a lithium ion secondary battery. The cathode active material is a cathode active material represented by a general formula LiNiCoMnWO(&#x2212;0.05&#x2264;a&#x2264;0.2, x=1&#x2212;y&#x2212;z&#x2212;t, 0&#x2264;y&#x3c;1, 0&#x2264;t&#x3c;1, 0&#x3c;t&#x2264;0.03), wherein the cathode active material satisfies the following formula (1):&#x3c3;1/1&#x2264;0.92&#x2003;&#x2003;(1)where t1 is an element concentration average of insides and grain boundaries of primary particles of a W element, and &#x3c3;1 is an element concentration standard deviation of the insides and grain boundaries of the primary particles of the W element.

Cathode active material and lithium ion secondary battery comprising the same

A method of manufacturing an electrode laminate, which includes an active material layer and a solid electrolyte layer formed on the active material layer, includes: an active material layer forming step of forming an active material layer; and a solid electrolyte layer forming step of forming a solid electrolyte layer on the active material layer by applying a solid electrolyte layer-forming slurry to the active material layer and drying the solid electrolyte layer-forming slurry. In this method, a surface roughness Ra value of the active material layer is 0.29 &#x3bc;m to 0.98 &#x3bc;m when calculated using a laser microscope.

Method of manufacturing electrode laminate and method of manufacturing all-solid-state battery

An all-solid-state battery system comprising an all-solid-state battery comprising a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer, and a control device configured to control a charge-discharge voltage during use of the all-solid-state battery. The negative electrode active material layer includes alloy negative electrode active material particles. The amorphization degree of the alloy negative electrode active material particles is in the range of 27.8% to 82.8% and a ratio Z/W is in the range of 0.32 to 0.60, where Z is a controlled discharge capacity of the all-solid-state battery, and W is a theoretical capacity of the alloy negative electrode active material particles &#xd7; a total weight of the alloy negative electrode active material particles &#xd7; the amorphization degree.

All-solid-state battery system and method of manufacturing the same

A method for producing a sulfide all-solid-state battery with a high capacity retention rate, and a sulfide all-solid-state battery with a high capacity retention rate. The method for producing a sulfide all-solid-state battery may comprise forming a sulfide all-solid-state battery, initially charging the sulfide all-solid-state battery after the forming of the sulfide all-solid-state battery, and exposing the sulfide all-solid-state battery to an oxygen-containing gas atmosphere at at least any one of a time of the initially charging of the sulfide all-solid-state battery and a time after the initially charging of the sulfide all-solid-state battery.

Method for producing sulfide all-solid-state battery and sulfide all-solid-state battery

A method is provided where an anode of an all-solid-state lithium ion secondary battery is easily doped with lithium and to provide a small resistance at a low battery capacity. The method includes a manufacturing method of a cathode including mixing at least a conductive assistant (C1) and a sulfide solid electrolyte (E1) to obtain a mixture; and mixing at least one cathode active material, a solid electrolyte (E2) and the mixture obtained from the first step to obtain a cathode mixture, wherein an amount of energy added to the sulfide solid electrolyte (E1) is larger than an amount of energy added to the solid electrolyte (E2), and the mixture is a material that releases lithium ions at a potential lower than a potential at which the cathode active material releases and occludes lithium ions. Manufacturing methods for a cathode and an all-solid-state lithium ion secondary battery including the cathode mixture are also disclosed.

Cathode mixture, cathode, and all-solid-state lithium ion secondary battery, and method for manufacturing the same

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

An all-solid-state battery system comprising an all-solid-state battery comprising a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer, and a control device configured to control a charge-discharge voltage during use of the all-solid-state battery. The negative electrode active material layer includes alloy negative electrode active material particles. The amorphization degree of the alloy negative electrode active material particles is in the range of 27.8% to 82.8% and a ratio Z/W is in the range of 0.32 to 0.60, where Z is a controlled discharge capacity of the all-solid-state battery, and W is a theoretical capacity of the alloy negative electrode active material particles&#xd7;a total weight of the alloy negative electrode active material particles&#xd7;the amorphization degree.

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

According to the method for manufacturing electrode sheets, in a first cutting step, an original sheet, including a belt-shaped metal foil and an electrode material coated thereon in a lengthwise direction to form a plurality of coated portions spaced at a predetermined gap, is cut at a location between the coated portions. In a pressing step, the original sheet strips having been cut in the first cutting step are pressed. In this case, the original sheet strips that are pressed by the rolling device are independent from each other. Therefore, the effect produced in rolling of the coated portions remains within each of the original sheet strips. In addition, distortions occurring in the original sheet strips can be prevented from affecting each other and the occurrence of wrinkles can be inhibited.

Method for manufacturing electrode sheets and apparatus therefor

A main object of the present invention is to provide a control device of battery charging capable of quickly charging a battery to an intended capacity while inhibiting occurrence of defect in the battery, the control device including a first output unit outputting a heating signal to heat a battery, a second output unit outputting a charging signal to charge the battery heated according to the heating signal, and a controller judging whether or not a degree of degradation of the battery is a first value or more, wherein where the controller judges the degree of degradation to be the first value or more, the controller controls the heating signal to make the charging rate of the battery whose degree of degradation is the first value or more equal to or closer to a charging rate of the battery when the degree of degradation is less than the first value.

Control device of battery charging

A main object of the present invention is to provide a practical slurry having a polar solvent as the dispersion medium for a sulfide solid electrolyte material. The present invention solves the above-mentioned problem by providing a slurry having: a sulfide solid electrolyte material, and a dispersion medium having at least one selected from the group consisting of tertiary amine; ether; thiol; ester having a functional group of a 3 or more carbon number bonded with a carbon atom of an ester bonding and a functional group of a 4 or more carbon number bonded with an oxygen atom of the ester bonding; and ester having a benzene ring bonded with a carbon atom of an ester bonding.

Slurry, production method for solid electrolyte layer, production method for electrode active material layer, and production method for all-solid-state battery

Growing community of inventors

Kariya, Japan

Keisuke Omori