公开(公告)号：US11355755B2

公开(公告)日：2022-06-07

申请号：US15770767

申请日：2016-10-27

Applicant: KURARAY CO., LTD.

Inventor： Tomohiro Kawakami ,  Takafumi Izawa ,  Taketoshi Okuno ,  Jun-Sang Cho ,  Hideharu Iwasaki

IPC: H01M4/583 ,  H01M4/587 ,  C01B32/05 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/02

Abstract: A carbonaceous material for a non-aqueous electrolyte secondary battery, having an average interplanar spacing d002 of the (002) plane within a range of 0.36 to 0.42 nm calculated by using the Bragg equation according to a wide-angle X-ray diffraction method, a specific surface area within a range of 8 to 30 m2/g obtained by a nitrogen adsorption BET three-point method, a nitrogen element content of 0.5 mass % or less, an oxygen element content of 0.3 mass % or less, and an average particle diameter of 1 to 2.8 μm according to a laser scattering method.

公开(公告)号：US12266802B2

公开(公告)日：2025-04-01

申请号：US17918356

申请日：2021-04-19

Applicant: KURARAY CO., LTD.

Inventor： Junichi Arima ,  Akinori Yamabata ,  Taketoshi Okuno ,  Shinya Tago

IPC: H01M4/62 ,  C01B32/318 ,  C01B32/342

Abstract: The present invention relates to a carbonaceous material having a pore volume determined by performing Grand Canonical Monte Carlo simulation on an adsorption-desorption isotherm of carbon dioxide of 0.05 cm3/g or more and 0.20 cm3/g or less, and a ratio of desorption amount to adsorption amount (desorption amount/adsorption amount) at a relative pressure of 0.01 in the adsorption-desorption isotherm of 1.05 or more.

公开(公告)号：US10734650B2

公开(公告)日：2020-08-04

申请号：US15770866

申请日：2016-10-27

Applicant: KURARAY CO., LTD.

Inventor： Tomohiro Kawakami ,  Sayaka Ide ,  Takafumi Izawa ,  Taketoshi Okuno ,  Jun-Sang Cho ,  Hideharu Iwasaki

IPC: H01M4/13 ,  H01M4/587 ,  C01B32/05 ,  H01M10/0525 ,  H01M4/02

Abstract: Provided is a carbonaceous material used in a negative electrode of a non-aqueous electrolyte secondary battery that shows favorable charge/discharge capacities and low resistance and having favorable resistance to oxidative degradation. The carbonaceous material has an average interplanar spacing d002 of the (002) plane of 0.36 to 0.42 nm calculated by using the Bragg equation according to a wide-angle X-ray diffraction method, a specific surface area of 20 to 65 m2/g obtained by a nitrogen adsorption BET three-point method, a nitrogen element content of 0.3 mass % or less, an oxygen element content of 2.5 mass % or less, and an average particle diameter of 1 to 4 μm according to a laser scattering method.

公开(公告)号：US10472239B2

公开(公告)日：2019-11-12

申请号：US15735006

申请日：2016-06-09

Applicant: KURARAY CO., LTD.

Inventor： Kyomi Tajima ,  Hidetoshi Kudo ,  Taketoshi Okuno ,  Hideharu Iwasaki

IPC: C01B32/05 ,  H01M4/587 ,  H01G9/00 ,  H01G9/042 ,  H01G11/34 ,  H01G11/44 ,  H01G11/86 ,  H01M10/0525

Abstract: The present invention relates to a carbonaceous material derived from a plant starting material, which is useful for electronic materials for conductive materials, capacitor electrodes, storage battery electrodes, nonaqueous electrolyte secondary battery electrodes and the like. The present invention relates to a carbonaceous material for electronic materials, which is obtained by burning a carbon precursor derived from palm husk, and which is configured such that: the potassium content in the carbonaceous material is 100 ppm or less; the calcium content in the carbonaceous material is 100 ppm or less; and the elemental oxygen content in the carbonaceous material is 0.25% by weight or less.

公开(公告)号：US11634330B2

公开(公告)日：2023-04-25

申请号：US16488862

申请日：2018-02-23

Applicant: KURARAY CO., LTD.

Inventor： Shohei Kobayashi ,  Motomi Matsushima ,  Taketoshi Okuno ,  Hideharu Iwasaki

IPC: C01B31/08 ,  C01B32/318 ,  C01B32/348 ,  C01B32/336 ,  C01B32/30

Abstract: The present invention relates to a carbonaceous material which is derived from a plant, having a specific surface area of 1800 to 3000 m2/g as measured by a BET method, a hydrogen element content of 0.42% by mass or less and an oxygen element content of 1.5% by mass or less.

公开(公告)号：US10984963B2

公开(公告)日：2021-04-20

申请号：US16488488

申请日：2018-02-23

Applicant: KURARAY CO., LTD.

Inventor： Shohei Kobayashi ,  Motomi Matsushima ,  Taketoshi Okuno ,  Hideharu Iwasaki

IPC: H01G11/34 ,  C01B32/354 ,  H01G11/42 ,  H01G11/86

Abstract: The present invention relates to a carbonaceous material having a specific surface area of 1,800 m2/g to 3,000 m2/g according to a BET method, an R-value of 1.2 or more and a G-band half-value width of 70 cm−1 or more according to a Raman spectrum.

公开(公告)号：US11345601B2

公开(公告)日：2022-05-31

申请号：US16322240

申请日：2017-08-02

Applicant: KURARAY CO., LTD.

Inventor： Takafumi Izawa ,  Keiichi Nishimura ,  Taketoshi Okuno ,  Hideharu Iwasaki

IPC: C01B32/318 ,  H01M4/587 ,  C01B32/336 ,  C01B32/30 ,  H01M4/04 ,  H01M4/02

Abstract: The present invention relates to a carbonaceous material that is suitable for the negative pole active substance of a nonaqueous electrolyte secondary battery, a negative pole for a nonaqueous electrolyte secondary battery comprising the carbonaceous material, a nonaqueous electrolyte secondary battery having the negative pole, and a method for producing the carbonaceous material. This carbonaceous material is for a negative pole active substance of a nonaqueous electrolyte secondary battery. The carbonaceous material is derived from plants, the half-width of the peak at approximately 1360 cm-1 of the Raman spectrum observed by laser Raman spectroscopy is 190 to 240 cm-1, and the specific surface area as found by multipoint BET analysis of nitrogen adsorption is 10 to 100 m2/g.

公开(公告)号：US10381637B2

公开(公告)日：2019-08-13

申请号：US15030258

申请日：2014-10-10

Applicant: KURARAY CO., LTD.

Inventor： Akira Koshima ,  Taketoshi Okuno ,  Kenichi Koyakumaru ,  Hideharu Iwasaki ,  Kenta Aoki ,  Makoto Imaji ,  Yasuhiro Tada ,  Naohiro Sonobe

IPC: H01M4/133 ,  H01M4/583 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/587 ,  H01M10/052 ,  H01M4/02

Abstract: Provided is a less hygroscopic carbonaceous material that is obtained from a plant-derived carbonaceous raw material and that, when used as a negative electrode material for a nonaqueous electrolyte secondary battery, allows the battery to exhibit good battery characteristics. Provided is a carbonaceous material for negative electrodes of nonaqueous electrolyte secondary batteries. This carbonaceous material is a particulate carbonaceous material containing carbonaceous particles. The carbonaceous material has a BET specific surface area of 1 m2/g or more and less than 20 m2/g. Each of the carbonaceous particles of the carbonaceous material has a core and a skin covering the core. The core contains a calcined product of a plant-derived carbonaceous raw material. The skin is made of a material that has higher electron emission ability upon irradiation with an electron beam than a material of the core.