公开(公告)号：US20190067677A1

公开(公告)日：2019-02-28

申请号：US16081191

申请日：2017-02-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kaoru Nagata ,  Noriko Manabe

IPC: H01M4/131 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/36

Abstract: A non-aqueous electrolyte secondary battery according to one mode of the present disclosure is provided with: a positive electrode including a positive-electrode active material layer; a negative electrode; and a non-aqueous electrolyte, wherein the positive-electrode active material layer includes positive-electrode active material particles having a particle size distribution in which the difference (D90-D10) between a 90% diameter (D90) and a 10% diameter (D10) measured with a laser diffraction method is larger than 13 μm. In addition, the positive-electrode active material layer is characterized in that, on an arbitrarily defined cross section thereof, the total area of positive-electrode active material particles A, each of which has a particle size not smaller than 15 μm and has a particle area at least 0.8-fold the area of a circle circumscribing the positive-electrode active material particle, is 20% or larger with respect to the total area of the cross section.

公开(公告)号：US20180248220A1

公开(公告)日：2018-08-30

申请号：US15753772

申请日：2016-08-23

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Noriko Manabe ,  Kaoru Nagata ,  Masahiro Kinoshita ,  Taizou Sunano

IPC: H01M10/0525 ,  H01M4/525 ,  H01M4/587 ,  H01M4/38 ,  H01M4/36

CPC classification number: H01M10/0525 ,  H01M4/131 ,  H01M4/364 ,  H01M4/386 ,  H01M4/525 ,  H01M4/587 ,  H01M2004/021

Abstract: In a nonaqueous electrolyte secondary battery which includes an electrode assembly that includes a positive electrode including a positive electrode current collector and a positive electrode mixture layer, a negative electrode including a negative electrode current collector and a negative electrode mixture layer, and a separator, the positive electrode mixture layer contains Ni in a proportion of not less than 85 mol % relative to the total molar amount of metal element(s) except lithium, and includes a lithium transition metal oxide bearing on the surface thereof an attached element belonging to Group VI of the periodic table. The negative electrode mixture layer includes a carbon material and a silicon compound. The surface pressure present on a plane in which the positive electrode and the negative electrode are opposed to each other through the separator is not less than 0.1 MPa/cm2.

公开(公告)号：US10910631B2

公开(公告)日：2021-02-02

申请号：US16081191

申请日：2017-02-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kaoru Nagata ,  Noriko Manabe

IPC: H01M4/131 ,  H01M4/525 ,  H01M4/48 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02 ,  H01M4/62

Abstract: A non-aqueous electrolyte secondary battery according to one mode of the present disclosure is provided with: a positive electrode including a positive-electrode active material layer; a negative electrode; and a non-aqueous electrolyte, wherein the positive-electrode active material layer includes positive-electrode active material particles having a particle size distribution in which the difference (D90-D10) between a 90% diameter (D90) and a 10% diameter (D10) measured with a laser diffraction method is larger than 13 μm. In addition, the positive-electrode active material layer is characterized in that, on an arbitrarily defined cross section thereof, the total area of positive-electrode active material particles A, each of which has a particle size not smaller than 15 μm and has a particle area at least 0.8-fold the area of a circle circumscribing the positive-electrode active material particle, is 20% or larger with respect to the total area of the cross section.