Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Keigo Hoshina

Norio Takami

Yasuhiro Harada

Hiroki Inagaki

Yasunobu Yamashita

Yoshiyuki Isozaki

Wen Zhang

Yuki Otani

Tetsuya Sasakawa

Kazuomi Yoshima

Mitsuru Ishibashi

Shinsuke Matsuno

Dai Yamamoto

Kazuki Ise

Takuya Iwasaki

Yorikazu Yoshida

Yuta Kanai

Ryo Hara

Masanori Tanaka

Kazuhiro Yasuda

Tetsuro Kano

Yusuke Namiki

Yoshihiko Nakano

Yuki Watanabe

Takashi Kishi

Tomoko Sugizaki

Kiyoshi Kanamura

Taro Fukaya

Nobuyasu Negishi

Tomoe Kusama

Yuma Kikuchi

Asuna Hagiwara

Hironori Takatsuka

Hidetoshi Watanabe

Hirofumi Yasumiishi

Kakuya Ueda

Fumihiro Tejima

Nen Zhang

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer and a current collector. The active material-containing layer comprises a first edge having an arc shape and a second edge positioned opposite to the first edge. The current collector comprises an active material-supporting section supporting the active material-containing layer, and an active material-non-supporting section. The curving amount is represented by a maximum distance from the first edge to a reference line connecting two points on the first edge. The curving amount is in a range of −1 mm or more and less than 0 mm.

Battery electrode

According to one embodiment, a battery is provided. The battery includes a positive electrode, and a negative electrode including a negative electrode active material-containing layer including a niobium-titanium composite oxide and a conductive agent that includes a carbon material. The negative electrode active material-containing layer includes a principal surface facing the positive electrode. Assuming that the thickness of the negative electrode active material-containing layer is A, a ratio (C2/C1) of carbon content ratio C2 at a depth of 0.5 A from the principal surface to carbon content ratio C1 at a depth of 1 μm from the principal surface satisfies 2≤C2/C1≤30.

Battery and battery pack

An electrode includes an active material-containing layer that contains active material particles and a binder containing a polymer. The active material particles contain a lithium-containing nickel-cobalt-manganese composite oxide represented by LiNiCoMnMOwhere 0.9≤a≤1.2, 0<x≤0.5, 0<y≤0.5, 0<z≤0.1, x≥y, 0.4≤1−x−y≤0.8, and M is at least one element selected from B, Mg, Al, Si, Ca, Ti, Zn, Zr, Sn, and W. The polymer has a repeating unit derived from vinylidene fluoride and one or more peaks in a nuclear magnetic resonance spectrum with fluorine-19 as a detection nucleus are located in the range of −90 ppm or higher and −88 ppm or lower.

Electrode, nonaqueous electrolyte battery, and battery pack

According to one embodiment, an electrode is provided. The electrode includes a current collector and an active material-containing layer formed on the current collector. The active material-containing layer contains a lithium nickel cobalt manganese composite oxide and a lithium cobalt composite oxide. Pore size distribution obtained by mercury intrusion porosimetry for the active material-containing layer has a first peak top indicating a highest intensity Iwithin a pore size range of from 0.1 μm to 1 μm and a second peak top indicating an intensity Iwhich is a second highest intensity after the highest intensity Iwithin the pore size range of from 0.1 μm to 1 μm. A pore size at the first peak top is smaller than a pore size at the second peak top.

Electrode, electrode group, battery, and battery pack

According to one embodiment, provided is an electrode including a current collector and an active material-containing layer in contact with the current collector. The active material-containing layer contains a carbon nanotube and particles of titanium-containing oxide having an average particle size or 0.1 μm to 3 μm. A peel strength between the current collector and the active material-containing layer is within a range of 0.2 kN/m to 0.7 kN/m.

Electrode, electrode group, secondary battery, battery pack, and vehicle

According to one embodiment, provided is an active material including a composite oxide having a tetragonal crystal structure. The composite oxide is represented by general formula LiTiNbMO. Here, M is one selected from the group consisting of W and Mo, 0≤a≤b+4+3c, 0<b<2−2d, and 0<c<2−4d.

Active material, electrode, secondary battery, battery pack, and vehicle

According to one embodiment, a secondary battery including a positive electrode, a negative electrode, an insulating layer, and a nonaqueous electrolyte is provided. The positive electrode includes a positive electrode active material-containing layer containing a lithium nickel cobalt manganese composite oxide. The negative electrode includes a negative electrode active material-containing layer having a first surface. The insulating layer includes a solid electrolyte layer having a second surface that is at least partly opposed to or partly in contact with the first surface and containing a Li ion conductive oxide. At least part of the second surface or the first and second surfaces includes a Mn-containing substance. An abundance ratio of Mn on the second surface is higher than that on the first surface.

Secondary battery, battery pack, and vehicle

According to one embodiment, an electrode includes a current collector and an active material-containing layer. The active material-containing layer includes an active material, a conductive agent, and cellulose fiber. The conductive agent includes carbon fiber. The active material-containing layer includes a first surface brought into contact with the current collector, and a second surface. 2000/mmor less of first agglomerates are present on the second surface. Each of the first agglomerates includes at least one of the carbon fiber or the cellulose fiber, and does not include the active material. Each of the first agglomerates has a longest diameter of 5 μm or more and a shortest diameter of 1 μm or more.

Electrode, secondary battery, battery pack, and vehicle

According to one embodiment, an electrode is provided. The electrode includes a current collector, and an active material-containing layer which is formed on a surface of the current collector and includes a plurality of niobium titanium composite oxide particles. A X-ray diffraction pattern using a Cu-Kα ray source with respect to a surface of the active material-containing layer includes a peak A with a highest intensity in a range of 2θ=26°±0.2° and a peak B with a highest intensity in a range of 2θ=23.9°±0.2°. An intensity ratio (Ia/Ib) between an intensity Ia of the peak A and an intensity Ib of the peak B is in a range of 1.80 or more to 2.60 or less.

Electrode, secondary battery, battery pack and vehicle

According to one embodiment, an electrode group is provided. The electrode group includes a positive electrode active material-containing layer and a negative electrode active material-containing layer. The negative electrode active material-containing layer contains at least one titanium-containing composite oxide selected from the group consisting of a monoclinic niobium titanium composite oxide and an orthorhombic titanium-containing composite oxide. The electrode group satisfies the following formula:6500&#x2264;&#x2264;18500,

Electrode group, battery, and battery pack

According to one embodiment, provided is an electrode group including a positive electrode and a negative electrode that includes a titanium-containing oxide. The electrode group has a wound structure of a flat shape, in which a stack including the positive electrode and the negative electrode is wound such that a center of the wound structure lies along a first direction. At least a part of a portion of the negative electrode, positioned within a thickness of 0.2 t from an innermost lap along a longest straight line in a wound cross-section of the wound structure orthogonal to the first direction with respect to a thickness t from the innermost lap to an outermost lap along the longest straight line, includes a slit that lies along the first direction.

Electrode group, secondary battery, battery pack, and vehicle

According to one embodiment, provided is a nonaqueous electrolyte battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes lithium manganese composite oxide particles having a spinel crystal structure and lithium cobalt composite oxide particles. The negative electrode includes a titanium-containing oxide. The nonaqueous electrolyte contains a propionate ester. The battery satisfies 0.8&#x2264;p/n&#x2264;1.2 and 1&#x2264;w/s&#x2264;60. p denotes a capacity per unit area of the positive electrode. n denotes a capacity per unit area of the negative electrode. w denotes a content of the propionate ester in the nonaqueous electrolyte and is in a range of 10% by weight to 60% by weight. s denotes an average particle size of the lithium manganese composite oxide particles.

Nonaqueous electrolyte battery and battery pack

A nonaqueous electrolyte battery includes: a positive electrode containing a positive electrode active material made of a compound represented by a compositional formula of LiMnFeAPO(wherein A is at least one selected from the group consisting of Mg, Ca, Al, Ti, Zn and Zr, 0&#x2264;x&#x2264;0.3, and 0&#x2264;y&#x2264;0.1); a negative electrode containing a negative electrode active material made from a titanium composite oxide; and a nonaqueous electrolyte, wherein a ratio (I/I) of a peak intensity (I) of a P&#x2014;F bond to a peak intensity (I) of a P&#x2014;O bond on the surface of the positive electrode, which are measured by X-ray photoelectron spectroscopic analysis, is 0.4 or more and 0.8 or less.

Nonaqueous electrolyte battery, battery pack and vehicle

According to an embodiment, there is provided an electrode including an active material-containing layer. A logarithmic differential pore volume distribution curve of the active material-containing layer by a mercury intrusion method includes first and second peaks. The first peak is a local maximum value in a range where a pore size is from 0.1 &#x3bc;m or more to 0.5 &#x3bc;m or less. The second peak is a local maximum value in a range where the pore size is from 0.5 &#x3bc;m or more to 1.0 &#x3bc;m or less. An intensity A1 of the first peak and an intensity A2 of the second peak satisfy 0.1&#x2264;A2/A1&#x2264;0.3. A density of the active material-containing layer is from 2.9 g/cmor more to 3.3 g/cmor less.

Electrode, nonaqueous electrolyte battery and battery pack

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer. The active material-containing layer contains an active material and a flat plate-shaped silicate.

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Yokohama, Japan

Keigo Hoshina