公开(公告)号：US20210043885A1

公开(公告)日：2021-02-11

申请号：US16977051

申请日：2019-03-22

Applicant: TDK CORPORATION

Inventor： Takamasa MINAMI ,  Kazuma AKIMOTO ,  Hideaki SEKI

IPC: H01M2/02 ,  H01M2/30 ,  H01M10/058

Abstract: A non-aqueous electrolyte secondary battery in which a potential of a metal layer in an exterior body is kept noble, and corrosion can be suppressed, including: a power generation element wherein a positive electrode and a negative electrode are opposed to each other with a separator interposed therebetween, and the negative electrode is disposed on an outer side than the positive electrode; and an exterior body which covers the power generation element, and has a metal layer and a resin layer which covers both surfaces of the metal layer, and an average thickness t1 of a first part of the exterior body which covers upper and lower surfaces of the power generation element in a lamination direction of the power generation element and an average thickness t2 of a second part of the exterior body which covers side surfaces of the power generation element satisfy a relationship of t2/t1

公开(公告)号：US20170062811A1

公开(公告)日：2017-03-02

申请号：US14960964

申请日：2015-12-07

Applicant: TDK CORPORATION

Inventor： Masahiro TSUCHIYA ,  Tomohiko HASEGAWA ,  Yuji YAMAMOTO ,  Kazuma AKIMOTO

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/38

CPC classification number: H01M4/366 ,  H01M4/38 ,  H01M4/382 ,  H01M4/62 ,  H01M8/0637 ,  H01M10/0525

Abstract: Stabilized lithium powder according to an embodiment of this disclosure contains lithium particles and transition metal. Each lithium particle has a stabilized film on a surface thereof; the stabilized film contains an inorganic compound; and main transition metal, which is contained the most in the transition metal, is contained by 0.5×10−3 wt % or more and 11.5×10−3 wt % or less.

Abstract translation: 根据本公开实施方案的稳定的锂粉末含有锂颗粒和过渡金属。 每个锂颗粒在其表面上具有稳定的膜; 稳定膜含有无机化合物; 在过渡金属中含有最多的主过渡金属的含量为0.5×10 -3重量％以上且11.5×10 -3重量％以下。

公开(公告)号：US20230290938A1

公开(公告)日：2023-09-14

申请号：US17959808

申请日：2022-10-04

Applicant: TDK CORPORATION

Inventor： Kazuma AKIMOTO

IPC: H01M4/38 ,  H01M10/0525

CPC classification number: H01M4/386 ,  H01M10/0525 ,  H01M2004/021

Abstract: The negative electrode active material contains silicon particles, and when an X-ray photoelectron spectroscopy spectrum with a binding energy in a range of 678 eV or more and 698 eV or less is measured from a surface in a depth direction, the X-ray photoelectron spectroscopy spectrum measured at any position in the depth direction has a first peak with a binding energy of 687 eV or more.

公开(公告)号：US20220311009A1

公开(公告)日：2022-09-29

申请号：US17702272

申请日：2022-03-23

Applicant: TDK CORPORATION

Inventor： Kazuma AKIMOTO ,  Masahiro SAEGUSA

IPC: H01M4/66 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/38 ,  H01M4/62 ,  H01M4/36

Abstract: There is provided an electrode for a lithium ion secondary battery including: a metal foil; a conductive layer formed on at least a part of the metal foil; and an active material layer formed on at least a part of a surface on a side opposite to a side of the metal foil of surfaces of the conductive layer, in which the conductive layer contains conductive particles and an insulating resin, the active material layer contains a first active material layer and a second active material layer, the first active material layer and the second active material layer are laminated such that the first active material layer is closer to the conductive layer, and the second active material layer has a porosity larger than a porosity of the first active material layer.

公开(公告)号：US20200235350A1

公开(公告)日：2020-07-23

申请号：US16635496

申请日：2019-03-22

Applicant: TDK CORPORATION

Inventor： Takamasa MINAMI ,  Kazuma AKIMOTO ,  Hideaki SEKI

IPC: H01M2/02 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2/16 ,  H01M2/30 ,  H01M4/13 ,  H01M10/0563

Abstract: A non-aqueous electrolytic liquid secondary battery wherein a potential of a metal layer in an exterior body is kept high, and corrosion can be suppressed, wherein an average thickness t1 of a first part of an exterior body covering a first side surface where a negative and a positive electrode terminal of a power generation element exist is different from an average thickness t2 of a second part of the exterior body covering a second side surface that intersects the first. In plan view of the power generation element from a lamination direction, in a second direction orthogonal to a first direction in which the electrode terminals extend, the relationship of t1 t2 is satisfied when the width of the negative electrode is smaller than the positive.