公开(公告)号：EP3978441A1

公开(公告)日：2022-04-06

申请号：EP21164159.2

申请日：2021-03-23

Applicant: Sumitomo Osaka Cement Co., Ltd.

Inventor： NOZOE, Tsutomu ,  NAKANO, Toyomasa

IPC: C01G49/00 ,  H01M4/1397 ,  H01M4/36 ,  H01M4/58 ,  H01M4/62 ,  H01M4/02 ,  H01M10/0525

Abstract: A positive electrode material for lithium ion secondary batteries is provided, wherein a ratio (A/B) of an oil absorption amount (A) of powder per unit mass of the material, which is measured using N-methyl-2-pyrrolidone, to a void volume (B) of powder per unit mass of the material is 0.30 or more and 0.85 or less, and a ratio (C/D) of a powder density (C) of the material, which is measured in a powder pressure test at a pressure of 4.5 MPa, to an initial powder density (D) of the material is 1.3 or more and 1.7 or less.

公开(公告)号：EP3890068A1

公开(公告)日：2021-10-06

申请号：EP20198084.4

申请日：2020-09-24

Applicant: Sumitomo Osaka Cement Co., Ltd.

Inventor： NOZOE, Tsutomu ,  NAKANO, Toyomasa

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525 ,  C01B25/45 ,  H01M4/131 ,  H01M4/02

Abstract: A positive electrode material for a lithium ion secondary battery containing carbon, in which, when a peak of the carbon that is measured by Raman scattering and is present at 2200 to 3400 cm -1 is peak-separated into peaks including five types of Voigt functions of a peak 1 having a peak top present at 2200 to 2380 cm -1 , a peak 2 having a peak top present at 2400 to 2550 cm -1 , a peak 3 having a peak top present at 2600 to 2750 cm -1 , a peak 4 having a peak top present at 2850 to 2950 cm -1 , and a peak 5 having a peak top present at 3100 to 3250 cm -1 , an average of proportions of Gaussian functions in the peak 3 and the peak 4 is 90% or more and less than 100%.

公开(公告)号：EP3799160A1

公开(公告)日：2021-03-31

申请号：EP20161840.2

申请日：2020-03-09

Applicant: Sumitomo Osaka Cement Co., Ltd.

Inventor： NOZOE, Tsutomu ,  NAKANO, Toyomasa

IPC: H01M4/136 ,  H01M4/36 ,  H01M4/58 ,  H01M10/0525

Abstract: A positive electrode material for a lithium ion secondary battery capable of obtaining a lithium ion secondary battery having a high discharge capacity and excellent cycle characteristics, a positive electrode for a lithium ion secondary battery using the positive electrode material, and a lithium ion secondary battery having the positive electrode are provided.
Provided is the positive electrode material for a lithium ion secondary battery, including core particles and a carbonaceous film coating a surface of the core particles, in which in a Raman spectrum analysis of the carbonaceous film, in a case where a peak intensity of a spectrum in a wave number band of 1,200 to 1,400 cm -1 is set as D, a minimum intensity of 1,400 to 1,550 cm -1 is set as V, and a peak intensity of the spectrum of 1,550 to 1,700 cm -1 is set as G, an average D/G is 0.77 or more and 0.98 or less and an average V/G is 0.50 or more and 0.66 or less, and each of variation coefficients of D/G and V/G is 2% or less.

公开(公告)号：EP3716368A1

公开(公告)日：2020-09-30

申请号：EP19200132.9

申请日：2019-09-27

Applicant: Sumitomo Osaka Cement Co., Ltd.

Inventor： NOZOE, Tsutomu ,  NAKANO, Toyomasa

IPC: H01M4/136 ,  H01M4/36 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525

Abstract: A positive electrode material for lithium-ion secondary batteries, wherein the positive electrode material includes a carbon-coatedpositive electrode active material which comprises primary particles, secondary particles, and a carbon film, wherein the primary particles and the secondary particles are coated with the carbon film, wherein the primary particles consists of a positive electrode active material in which a strain of the positive electrode active material, which is calculated by X-ray diffraction measurement, is 0.01% or higher and 0.1% or lower, and a ratio (B/A) of a crystallite diameter B (nm) of the positive electrode active material to an average primary particle diameter A (nm) of the carbon-coated positive electrode active material is 0.9 or higher and 1.5 or lower, wherein the particle diameter A is calculated from a specific surface area of the carbon-coated positive electrode active material, wherein the specific surface area is obtained using a BET method.

公开(公告)号：EP3799159A1

公开(公告)日：2021-03-31

申请号：EP20161805.5

申请日：2020-03-09

Applicant: Sumitomo Osaka Cement Co., Ltd.

Inventor： NOZOE, Tsutomu ,  NAKANO, Toyomasa

IPC: H01M4/136 ,  H01M4/36 ,  H01M4/58 ,  H01M10/0525

Abstract: A positive electrode material for a lithium ion secondary battery capable of obtaining a lithium ion secondary battery having a high discharge capacity and excellent cycle characteristics, a positive electrode for a lithium ion secondary battery using the positive electrode material, and a lithium ion secondary battery having the positive electrode are provided.
Provided is the positive electrode material for a lithium ion secondary battery, including core particles and a carbonaceous film coating a surface of the core particles, in which in a Raman spectrum analysis of the carbonaceous film, in a case where a peak intensity of a spectrum in a wave number band of 1,200 to 1,400 cm -1 is set as D, a minimum intensity of 1,400 to 1,550 cm -1 is set as V, and a peak intensity of the spectrum of 1,550 to 1,700 cm -1 is set as G, an average D/G is 0.77 or more and 0.98 or less and an average V/G is 0.50 or more and 0.66 or less, and in a case where the average D/G is set as a and the average V/ G is set as b, X falls within a range of -0.1 ≤ X ≤ 0.1 in Expression X = a - 1.47b.