公开(公告)号：US10811729B2

公开(公告)日：2020-10-20

申请号：US15957047

申请日：2018-04-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoki Tsuji ,  Masahiro Shiraga ,  Manabu Takijiri ,  Takayuki Shirane ,  Hiroyuki Fujimoto

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/525 ,  H01M4/131 ,  H01M2/36 ,  H01M4/02

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode mix layer, a negative electrode including a negative electrode mix layer, and a nonaqueous electrolyte containing a nonaqueous solvent. A surface of the negative electrode mix layer is provided with grooves. The nonaqueous electrolyte contains 10 volume percent or more of a fluorinated solvent with respect to the volume of the nonaqueous solvent and has a viscosity (25° C.) of 3.50 mPa·s or more as measured with a differential pressure viscometer.

公开(公告)号：US20190027752A1

公开(公告)日：2019-01-24

申请号：US16141272

申请日：2018-09-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryo Kazama ,  Masanobu Takeuchi ,  Tomoki Tsuji ,  Manabu Takijiri

IPC: H01M4/525 ,  H01M10/05 ,  H01M4/505

Abstract: This non-aqueous electrolyte secondary battery is equipped with a positive electrode comprising: a positive electrode active substance containing a lithium-containing transition metal oxide; and a lithium compound derived from an irreversible substance irreversibly reacting with lithium at a voltage lower than the average operating voltage of the positive electrode active substance.

公开(公告)号：US20200168907A1

公开(公告)日：2020-05-28

申请号：US16634998

申请日：2018-07-19

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Manabu Takijiri ,  Yuta Kuroda

IPC: H01M4/505 ,  H01M10/0569 ,  H01M4/525 ,  H01M10/0525

Abstract: This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode and a nonaqueous electrolyte. The nonaqueous electrolyte comprises a nonaqueous solvent that contains a fluorine-containing cyclic carbonate; the positive electrode comprises a positive electrode active material that contains composite oxide particles which contain Ni, Co and Li, while containing at least one of Mn and Al, and wherein the proportion of Ni relative to the total number of moles of the metal elements excluding Li is 50% by mole or more; and the composite oxide particles are in a non-aggregated state, while having a compressive strength of 250 MPa or more.

公开(公告)号：US12046748B2

公开(公告)日：2024-07-23

申请号：US16635018

申请日：2018-07-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Kuroda ,  Manabu Takijiri

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: A non-aqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material containing a composite oxide particle that includes Ni, Co and Li, and also includes at least one among Mn and Al, and the ratio of Ni to the total number of moles of metal elements excluding Li is 50 mol % or more. In the composite oxide particle, the ratio (A/B) of a BET specific surface area (A) to a theoretical specific surface area (B) determined by the following formula is more than 1.0 and less than 3.3. Theoretical specific surface area (B) (m2/g)=6/(true density (g/cm3)×volume average particle diameter (μm)).

公开(公告)号：US20220209229A1

公开(公告)日：2022-06-30

申请号：US17601641

申请日：2020-02-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Manabu Takijiri ,  Takeshi Ogasawara ,  Motoharu Saito ,  Yoshinori Aoki

IPC: H01M4/525 ,  H01M10/0525

Abstract: This positive electrode for a nonaqueous electrolyte secondary battery is provided with: a positive electrode active material including lithium composite oxide particles containing not less than 80 mol % but less than 100 mol % of Ni with respect to the total number of moles of metal elements other than Li; and a conductive material, wherein the lithium composite oxide particles include particles each having a step-like structure with three or more stacked flat surfaces having an outer edge length of 1 μm or more, and the average particle size of the conductive material is 30 nm or less.

公开(公告)号：US20210057710A1

公开(公告)日：2021-02-25

申请号：US17049412

申请日：2019-02-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masanobu Takeuchi ,  Manabu Takijiri ,  Yoshio Kato ,  Masahiro Shiraga

IPC: H01M2/26 ,  H01M10/0587 ,  H01M2/02 ,  H01M10/0567 ,  H01M4/587 ,  H01M4/133 ,  H01M10/0525

Abstract: A nonaqueous electrolyte secondary battery (10) according to one embodiment of the present disclosure is provided with: an electrode body (14) which is obtained by winding a positive electrode (30) and a negative electrode (40), with a separator (50) being interposed therebetween; a nonaqueous electrolyte; and a battery case (15) which is formed of a metal and contains the electrode body (14) and the nonaqueous electrolyte. The negative electrode (40) comprises a negative electrode collector (41) and a negative electrode active material layer (42) that contains graphite particles as a negative electrode active material; the outer circumferential surface of the electrode body (14) is provided with an exposure part (43) from which the negative electrode collector (41) is exposed so as to be in contact with the inner circumferential surface of the battery case (15); and the graphite particles have a compressive strength of 15 MPa or more.

公开(公告)号：US20200243856A1

公开(公告)日：2020-07-30

申请号：US16635018

申请日：2018-07-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Kuroda ,  Manabu Takijiri

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: A non-aqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material containing a composite oxide particle that includes Ni, Co and Li, and also includes at least one among Mn and Al, and the ratio of Ni to the total number of moles of metal elements excluding Li is 50 mol % or more. In the composite oxide particle, the ratio (A/B) of a BET specific surface area (A) to a theoretical specific surface area (B) determined by the following formula is more than 1.0 and less than 3.3. Theoretical specific surface area (B) (m2/g)=6/(true density (g/cm3)×volume average particle diameter (μm)).

公开(公告)号：US20220311045A1

公开(公告)日：2022-09-29

申请号：US17636593

申请日：2020-07-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Manabu Takijiri ,  Takeshi Ogasawara

IPC: H01M10/0525 ,  H01M4/583 ,  H01M4/525 ,  H01M10/0568

Abstract: In this non-aqueous electrolyte secondary battery, a positive electrode includes a lithium transition metal composite oxide that contains Ni at 85 mol % with respect to the total number of moles of metal elements excluding Li, and a negative electrode includes graphite particles having an internal porosity of 1-5%. The N/P ratio is 1.00-1.05, where P is the charging capacity of the positive electrode, and N is the charging capacity of the negative electrode.

公开(公告)号：US20210167396A1

公开(公告)日：2021-06-03

申请号：US17045261

申请日：2019-02-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryo Kazama ,  Yuta Kuroda ,  Manabu Takijiri

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/38 ,  H01M4/36 ,  H01M10/0525

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure comprises a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode has: a positive electrode current collector; and a positive electrode active material layer that is provided to the surface of the positive electrode current collector and includes a positive electrode active material and a positive electrode additive. The positive electrode active material contains a lithium-nickel composite oxide having a compressive breaking strength of at least 130 MPa and including at least 50 mol % of nickel relative to the total quantity of metals other than lithium. The positive electrode additive contains a lithium-containing metal oxide that has an antifluorite structure.

公开(公告)号：US20190221824A1

公开(公告)日：2019-07-18

申请号：US16358920

申请日：2019-03-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoki Tsuji ,  Manabu Takijiri ,  Yoshinori Sakai ,  Masanobu Takeuchi

IPC: H01M2/26 ,  H01M10/0587 ,  H01M2/02 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M2/263 ,  H01M2/022 ,  H01M2/26 ,  H01M4/131 ,  H01M4/525 ,  H01M4/70 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0587

Abstract: This non-aqueous electrolyte secondary battery has an electrode body comprising a positive electrode and a negative electrode which are wound around while sandwiching a separator therebetween, and housed in a cylindrical housing member. The positive electrode has a positive electrode collector and a positive electrode active substance layer extending above the positive electrode collector. The negative electrode has a negative electrode collector, a negative electrode active substance layer extending above the negative electrode collector, and a negative electrode lead connected to the negative electrode collector. The negative electrode lead is disposed more toward the wound core of the electrode body than the end portion of the negative electrode active substance layer and the end portion of the positive electrode active substance layer.