公开(公告)号：US11462773B2

公开(公告)日：2022-10-04

申请号：US16659774

申请日：2019-10-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuji Oura ,  Tomoki Shiozaki ,  Hideharu Takezawa ,  Takahito Nakayama ,  Takahiro Takahashi ,  Daisuke Furusawa

IPC: H01M4/62 ,  H01M10/42 ,  H01M4/13 ,  H01M4/36 ,  H01M4/02

Abstract: A secondary battery positive electrode is provided with: a positive electrode current collector; a positive electrode mixture layer; and an intermediate layer disposed between the positive electrode current collector and the positive electrode mixture layer. The intermediate layer comprises first particles configured from an electrically conductive material, and second particles which are configured from an insulating inorganic material and have an average grain size greater than an average grain size of the first particles. The volume ratio of the first particles in the intermediate layer is not less than 25% and less than 70%. The volume ratio of the second particles in the intermediate layer is not less than 30% and less than 75%. The density of the intermediate layer is greater than 1 g/cm3 and not more than 2.5 g/cm3.

公开(公告)号：US20200020924A1

公开(公告)日：2020-01-16

申请号：US16580206

申请日：2019-09-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hideharu Takezawa ,  Daisuke Furusawa ,  Yuji Oura ,  Takahiro Takahashi ,  Takahito Nakayama ,  Tomoki Shiozaki

IPC: H01M2/32 ,  H01M4/131 ,  H01M4/46 ,  H01M4/48 ,  H01M4/62

Abstract: A positive electrode is disclosed including a positive electrode collector containing aluminum, a positive electrode mixture layer containing a positive electrode active substance constituted from a lithium transition metal oxide, and a protective layer provided between the positive electrode collector and the positive electrode mixture layer. The protective layer contains inorganic compound particles and a conductive material, and has a recessed structure wherein the positive electrode mixture layer is recessed into the protective layer.

公开(公告)号：US20200052303A1

公开(公告)日：2020-02-13

申请号：US16659770

申请日：2019-10-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro Takahashi ,  Takahito Nakayama ,  Tomoki Shiozaki ,  Hideharu Takezawa ,  Daisuke Furusawa ,  Yuji Oura

IPC: H01M4/62 ,  H01M4/66 ,  H01M4/525

Abstract: Provided is a secondary battery comprising a positive electrode, a negative electrode, and an electrolyte. The positive electrode is provided with a positive electrode collector, a positive electrode mix layer containing positive electrode active substance particles, and an intermediate layer disposed between the positive electrode collector and positive electrode mix layer. The intermediate layer contains a conductor and a cured product of a curable resin having at least one selected from a glycidyl, hydroxy, carboxyl, amino, acryloyl, and methacryloyl groups.

公开(公告)号：US20200020951A1

公开(公告)日：2020-01-16

申请号：US16582347

申请日：2019-09-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daisuke Furusawa ,  Tomoki Shiozaki ,  Hideharu Takezawa ,  Takahito Nakayama ,  Yuji Oura ,  Takahiro Takahashi

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0587

Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector which contains aluminum; a positive electrode mixture layer which contains a positive electrode active material that is configured of a lithium transition metal oxide; and an intermediate layer which is arranged between the positive electrode current collector and the positive electrode mixture layer. The intermediate layer contains inorganic compound particles, a conductive material and a binder; the circularity is from 5% to 75% (inclusive); the void fraction of the intermediate layer is from 30% to 69% (inclusive); and the average circularity of the inorganic compound particles is from 5% to 75% (inclusive).

公开(公告)号：US11527757B2

公开(公告)日：2022-12-13

申请号：US16580195

申请日：2019-09-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahito Nakayama ,  Tomoki Shiozaki ,  Hideharu Takezawa ,  Daisuke Furusawa ,  Yuji Oura ,  Takahiro Takahashi

IPC: H01M4/62 ,  H01M4/13 ,  H01M4/36 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive electrode used in a secondary cell that is an example of the present embodiment is provided with a positive electrode collector, an intermediate layer formed on the positive electrode collector, and a positive electrode mixture layer formed on the intermediate layer. The positive electrode mixture layer has a thermally expandable material and a positive electrode active material. The thermally expandable material content of the positive electrode mixture layer is at least 0.1% by mass and less than 5% by mass. The intermediate layer has an insulating inorganic material and a conductive agent. The insulating inorganic material content of the intermediate layer is 80-99% by mass.

公开(公告)号：US20200020921A1

公开(公告)日：2020-01-16

申请号：US16582312

申请日：2019-09-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoki Shiozaki ,  Daisuke Furusawa ,  Yuji Oura ,  Takahiro Takahashi ,  Takahito Nakayama ,  Hideharu Takezawa

IPC: H01M2/26 ,  H01M4/131 ,  H01M10/0587 ,  H01M10/0525 ,  H01M4/62

Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector; a positive electrode active material layer which contains a positive electrode active material that is configured from a lithium transition metal oxide; a protective layer which is arranged between the positive electrode current collector and the positive electrode active material layer; and a positive electrode tab which is bonded with the positive electrode current collector at a positive electrode tab bonding part where the positive electrode active material layer and the protective layer are not formed so that the positive electrode current collector is exposed. An end edge of the positive electrode active material layer facing the positive electrode tab and an end edge of the protective layer facing the positive electrode tab are arranged in different positions in the longitudinal direction of the positive electrode.

公开(公告)号：US20220231282A1

公开(公告)日：2022-07-21

申请号：US17613655

申请日：2020-04-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahito Nakayama ,  Tomoki Shiozaki ,  Daisuke Furusawa

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/38 ,  H01M10/0525

Abstract: A negative-electrode active material for secondary batteries according to one aspect of the present invention comprises: core particles comprising a material which occludes and releases lithium metal; a first layer, which has been formed on the surface of each core particle; and a second layer, which has been formed on the first layer. The first layer comprises at least one substance selected from among amorphous carbon, carbon nanotubes, carbon nanofibers, and electroconductive polymers. The second layer comprises at least one inorganic compound selected from among oxides, phosphoric acid compounds, silicic acid compounds, and boric acid compounds.

公开(公告)号：US11145938B2

公开(公告)日：2021-10-12

申请号：US16582312

申请日：2019-09-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoki Shiozaki ,  Daisuke Furusawa ,  Yuji Oura ,  Takahiro Takahashi ,  Takahito Nakayama ,  Hideharu Takezawa

IPC: H01M50/531 ,  H01M4/131 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/525 ,  H01M4/66 ,  H01M4/02

Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector; a positive electrode active material layer which contains a positive electrode active material that is configured from a lithium transition metal oxide; a protective layer which is arranged between the positive electrode current collector and the positive electrode active material layer; and a positive electrode tab which is bonded with the positive electrode current collector at a positive electrode tab bonding part where the positive electrode active material layer and the protective layer are not formed so that the positive electrode current collector is exposed. An end edge of the positive electrode active material layer facing the positive electrode tab and an end edge of the protective layer facing the positive electrode tab are arranged in different positions in the longitudinal direction of the positive electrode.

公开(公告)号：US20200020950A1

公开(公告)日：2020-01-16

申请号：US16580195

申请日：2019-09-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahito Nakayama ,  Tomoki Shiozaki ,  Hideharu Takezawa ,  Daisuke Furusawa ,  Yuji Oura ,  Takahiro Takahashi

IPC: H01M4/62 ,  H01M4/66 ,  H01M4/36 ,  H01M4/13 ,  H01M10/0525

Abstract: A positive electrode used in a secondary cell that is an example of the present embodiment is provided with a positive electrode collector, an intermediate layer formed on the positive electrode collector, and a positive electrode mixture layer formed on the intermediate layer. The positive electrode mixture layer has a thermally expandable material and a positive electrode active material. The thermally expandable material content of the positive electrode mixture layer is at least 0.1% by mass and less than 5% by mass. The intermediate layer has an insulating inorganic material and a conductive agent. The insulating inorganic material content of the intermediate layer is 80-99% by mass.