公开(公告)号：US20230361313A1

公开(公告)日：2023-11-09

申请号：US17634391

申请日：2021-03-30

申请人： TDK Corporation

发明人： Takuya AOKI ,  Shuji HIGASHI ,  Syuji TSUKAMOTO ,  Keisuke TATSUZAKI ,  Kosuke TANAKA

IPC分类号： H01M4/13 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/70

CPC分类号： H01M4/70 ,  H01M4/13 ,  H01M4/661 ,  H01M10/0525 ,  H01M2004/021

摘要： An electrode for power storage devices includes: a resin layer having a first surface and a second surface that is located on an opposite side from the first surface; a first electrically-conductive layer that is disposed on the first surface side of the resin layer; and a first layer of particles that is disposed on an opposite side of the first electrically-conductive layer from the resin layer. In a cross section parallel to a thickness direction of the resin layer, the first electrically-conductive layer has a first shape including a plurality of protrusions that are convexed toward the resin layer and a recess that is disposed between two adjacent protrusions among the plurality of protrusions. A distance H along the thickness direction from one of top points of the two adjacent protrusions to a bottom point of the recess is smaller than a thickness of the resin layer.

公开(公告)号：US20230261207A1

公开(公告)日：2023-08-17

申请号：US17634372

申请日：2021-03-31

申请人： TDK Corporation

发明人： Shuji HIGASHI ,  Takuya AOKI

IPC分类号： H01M4/70 ,  H01M4/66 ,  H01M4/62 ,  H01M4/587 ,  H01M4/133

CPC分类号： H01M4/70 ,  H01M4/667 ,  H01M4/626 ,  H01M4/587 ,  H01M4/133 ,  H01G11/28

摘要： An electrode for power storage devices includes: a conductor plate having a first surface which has at least one first recessed portion and a second surface located opposite to the first surface, the first surface including a first region located outside the first recessed portion; and a first composite film including a first layer which contains an insulative material, a first electrically-conductive layer and a second electrically-conductive layer, the first layer being provided between the first electrically-conductive layer and the second electrically-conductive layer, wherein the first electrically-conductive layer of the first composite film is connected with the conductor plate at the first recessed portion, and the second electrically-conductive layer of the first composite film is connected with the first electrically-conductive layer at a position overlapping the first recessed portion as viewed in a normal direction of the first region of the conductor plate.

公开(公告)号：US20180254486A1

公开(公告)日：2018-09-06

申请号：US15909580

申请日：2018-03-01

申请人： TDK CORPORATION

发明人： Takuya AOKI ,  Yasuyuki KAWANAKA

IPC分类号： H01M4/62 ,  H01M10/0525 ,  H01M10/04 ,  H01M4/64

CPC分类号： H01M4/623 ,  H01M4/13 ,  H01M4/38 ,  H01M4/625 ,  H01M4/64 ,  H01M10/0459 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0025 ,  H01M2300/0037

摘要： A negative electrode active material includes a carbon material, and at least one sulfur component selected from the group consisting of sulfur atoms and a sulfur compound, wherein a content of the sulfur component with respect to a total amount of the carbon material and the sulfur component is 0.0005 mass % or more and 0.01 mass % or less in terms of S measured by a fluorescent X-ray analysis method, the carbon material is artificial graphite, and the artificial graphite has a bulk density of 0.2 g/cm3 or more and 2.5 g/cm3 or less. A negative electrode includes a negative electrode current collector, and a negative electrode active material layer formed on the negative electrode current collector, wherein the negative electrode active material layer includes the above-described negative electrode active material. A lithium ion secondary battery includes the above-described negative electrode, a positive electrode, and an electrolytic solution.

公开(公告)号：US20230361299A1

公开(公告)日：2023-11-09

申请号：US17634352

申请日：2021-03-29

申请人： TDK Corporation

发明人： Takuya AOKI ,  Shuji HIGASHI ,  Miyuki YANAGIDA ,  Makoto ENDO ,  Yoshihiro KANBAYASHI

IPC分类号： H01M4/583 ,  H01M4/66 ,  H01M10/0525

CPC分类号： H01M4/583 ,  H01M4/667 ,  H01M10/0525 ,  G01N23/2055

摘要： An electrode for power storage devices includes: a resin layer; a conductive layer containing copper and being disposed on the resin layer; and an active material layer containing graphite and being disposed on the conductive layer, wherein when measured by an X-ray diffraction method from a surface of the active material layer, a peak intensity ratio A/B between an intensity A at a highest X-ray diffraction peak in a range where a diffraction angle is 48° or more and 53° or less and an intensity B at a highest X-ray diffraction peak in a range where a diffraction angle is 52° or more and 57° or less satisfies Expression (1):







0.3
≤

A
/
B

≤
1




­­­(1)

公开(公告)号：US20180269468A1

公开(公告)日：2018-09-20

申请号：US15915371

申请日：2018-03-08

申请人： TDK CORPORATION

发明人： Hiroshi SASAGAWA ,  Yasuyuki KAWANAKA ,  Takuya AOKI

IPC分类号： H01M4/133 ,  H01M10/0525 ,  H01M4/38

CPC分类号： H01M4/133 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0585 ,  H01M2004/027

摘要： A negative electrode of a lithium ion secondary battery of the present invention includes a current collector (32) and a negative electrode active material layer (34) provided on the current collector (32). In the negative electrode of a lithium ion secondary battery, the negative electrode active material layer (34) includes carbon particles, a degree of graphitization of the carbon particles is 1.0 or more and 1.5 or less and a degree of orientation of the carbon particles is 50 or more and 150 or less; where, the degree of graphitization is a ratio (P101/P100) between a peak intensity P101 of the (101) plane and a peak intensity P100 of the (100) plane in an X-ray diffraction pattern and the degree of orientation is a ratio (P002/P110) between a peak intensity P002 of the (002) plane and a peak intensity P110 of the (110) plane in an X-ray diffraction pattern.