公开(公告)号：US10714746B2

公开(公告)日：2020-07-14

申请号：US15503362

申请日：2015-08-06

Applicant: Denka Company Limited

Inventor： Yoko Horikoshi ,  Toru Arai ,  Hitoshi Kaneko ,  Tatsuya Nagai ,  Ayumu Tsukamoto

IPC: H01B1/24 ,  H01M4/00 ,  H01M4/40 ,  H01M4/525 ,  C01B32/05 ,  H01M4/62 ,  C09D127/16 ,  C09D129/04 ,  C09D127/18 ,  H01M4/38 ,  H01M10/052 ,  B82Y40/00 ,  B82Y30/00 ,  H01M4/131 ,  C08F14/26 ,  C08F20/06 ,  C08L9/06

Abstract: A conductive composition for electrode is provided that is excellent in conductivity and dispersibility. Further, an electrode for lithium ion secondary battery with lower plate resistance and a lithium ion secondary battery excellent in rate characteristics are provided that use this conductive composition. A conductive composition for electrode, including: carbon nanofiber with a median diameter D50 value by volume from 0.1 to 8 pm; an active material; and a binder enables production of an electrode for lithium ion secondary battery with lower plate resistance and a lithium ion secondary battery excellent in rate characteristics.

公开(公告)号：US20170365372A1

公开(公告)日：2017-12-21

申请号：US15501800

申请日：2015-08-06

Applicant: Denka Company Limited

Inventor： Hitoshi Kaneko ,  Toru Arai ,  Yoko Horikoshi ,  Ayumu Tsukamoto ,  Akira Miyama

IPC: H01B1/24 ,  D01F9/127 ,  C08L101/00 ,  C08L55/02 ,  C08L33/10 ,  C08L29/04 ,  C08L25/06 ,  H01B1/00 ,  C08K3/04

CPC classification number: H01B1/24 ,  C08K3/041 ,  C08K3/046 ,  C08K7/06 ,  C08K2201/005 ,  C08L29/04 ,  C08L33/10 ,  C08L101/00 ,  D01F9/127 ,  D01F9/1278

Abstract: By using CNF excellent in dispersibility, conductivity, and crystallinity, a conductive polymer material having high conductivity even with a low CNF content and a shaped article thereof and a conductive polymer material with a less CNF content for same conductivity and a shaped article thereof are provided. A conductive polymer material with high conductivity is produced by using carbon nanofiber with a median diameter D50 value from 0.1 to 8 μm, powder resistivity of 0.03 Ωcm or less measured under a load of 9.8 MPa, and D/G from 0.5 to 1.3.

公开(公告)号：US20220074081A1

公开(公告)日：2022-03-10

申请号：US17455547

申请日：2021-11-18

Applicant: DENKA COMPANY LIMITED

Inventor： Toru Arai ,  Hitoshi Kaneko

IPC: D01F9/127 ,  B01J23/75 ,  B01J23/755 ,  C09D5/24 ,  H01B1/24 ,  C08K3/04 ,  C08L101/00 ,  C09D11/037 ,  C09D201/00 ,  D01F9/32 ,  C09D7/40 ,  H01M4/13 ,  H01B1/22 ,  B01J21/06 ,  B01J21/18 ,  B01J23/02 ,  C09D11/52 ,  H01M4/62

Abstract: A method for a carbon nanofiber composite, which can obtain a carbon nanofiber composite with high productivity and high activity, and which does not require removal of fluidizing materials or dispersing materials, provides a carbon nanofiber composite having improved dispersibility. The method for producing the carbon nanofiber composite includes bringing at least one catalyst and at least one particulate carbon material into contact with at least one gas containing at least one gaseous carbon-containing compound while mechanically stirring the catalyst and the particulate carbon material in a reactor. The carbon nanofiber composite includes carbon nanofibers and at least one particulate carbon material, wherein the particulate carbon material has 70% by volume or more of particles with a particle diameter of 1 μm or less, and/or a median diameter D50 by volume of 1 μm or less.

公开(公告)号：US20170288218A1

公开(公告)日：2017-10-05

申请号：US15503362

申请日：2015-08-06

Applicant: Denka Company Limited

Inventor： Yoko Horikoshi ,  Toru Arai ,  Hitoshi Kaneko ,  Tatsuya Nagai ,  Ayumu Tsukamoto

IPC: H01M4/40 ,  H01M4/62 ,  H01M4/38 ,  H01M10/052 ,  H01M4/525

Abstract: A conductive composition for electrode is provided that is excellent in conductivity and dispersibility. Further, an electrode for lithium ion secondary battery with lower plate resistance and a lithium ion secondary battery excellent in rate characteristics are provided that use this conductive composition. A conductive composition for electrode, including: carbon nanofiber with a median diameter D50 value by volume from 0.1 to 8 μm; an active material; and a binder enables production of an electrode for lithium ion secondary battery with lower plate resistance and a lithium ion secondary battery excellent in rate characteristics.

公开(公告)号：US09738993B2

公开(公告)日：2017-08-22

申请号：US15116776

申请日：2015-02-03

Applicant: Denka Company Limited

Inventor： Hitoshi Kaneko ,  Toru Arai ,  Masaya Umeyama ,  Yoko Tamura ,  Ayumu Tsukamoto

IPC: D01F9/127 ,  H01B1/04 ,  B01J35/00 ,  B01J35/10 ,  B01J21/10 ,  B01J23/75 ,  B82Y30/00 ,  B82Y40/00

CPC classification number: D01F9/1278 ,  B01J21/10 ,  B01J23/75 ,  B01J35/0006 ,  B01J35/1009 ,  B82Y30/00 ,  B82Y40/00 ,  H01B1/04 ,  Y10S977/762 ,  Y10S977/896 ,  Y10S977/932

Abstract: A manufacturing method of carbon nanofibers at a high activity is provided. Further, carbon nanofibers produced by the manufacturing method and being excellent in electric conductivity, crystallinity and dispersibility is provided.By a manufacturing method of carbon nanofibers in which an active species including cobalt as a chief component is employed as a catalyst and carbon monoxide is used as a carbon source, wherein said catalyst has 3 to 150 mass % of said active species carried on a carrier composed of a magnesium-containing oxide having a specific surface area of 0.01 to 5 m2/g, and a reaction temperature, partial pressure of carbon monoxide and a flow rate of raw material gas is controlled, CNFs that are excellent in electric conductivity, crystallinity and dispersibility can be manufactured at high activity, so that carbon nanofibers that is excellent in electric conductivity, crystallinity and dispersibility is obtained.

公开(公告)号：US12188159B2

公开(公告)日：2025-01-07

申请号：US17455547

申请日：2021-11-18

Applicant: DENKA COMPANY LIMITED

Inventor： Toru Arai ,  Hitoshi Kaneko

IPC: H01B1/00 ,  B01J21/06 ,  B01J21/18 ,  B01J23/02 ,  B01J23/75 ,  B01J23/755 ,  C08K3/04 ,  C08L101/00 ,  C09D5/24 ,  C09D7/40 ,  C09D11/037 ,  C09D11/52 ,  C09D201/00 ,  D01F9/12 ,  D01F9/127 ,  D01F9/32 ,  H01B1/22 ,  H01B1/24 ,  H01M4/13 ,  H01M4/62

Abstract: A method for a carbon nanofiber composite, which can obtain a carbon nanofiber composite with high productivity and high activity, and which does not require removal of fluidizing materials or dispersing materials, provides a carbon nanofiber composite having improved dispersibility. The method for producing the carbon nanofiber composite includes bringing at least one catalyst and at least one particulate carbon material into contact with at least one gas containing at least one gaseous carbon-containing compound while mechanically stirring the catalyst and the particulate carbon material in a reactor. The carbon nanofiber composite includes carbon nanofibers and at least one particulate carbon material, wherein the particulate carbon material has 70% by volume or more of particles with a particle diameter of 1 μm or less, and/or a median diameter D50 by volume of 1 μm or less.

公开(公告)号：US11264616B2

公开(公告)日：2022-03-01

申请号：US16330657

申请日：2017-07-03

Applicant: DENKA COMPANY LIMITED

Inventor： Tatsuya Nagai ,  Yoko Horikoshi ,  Hitoshi Kaneko ,  Hiroshi Yokota

IPC: C01B32/158 ,  H01M4/62 ,  H01M4/66 ,  H01M4/136 ,  H01M4/13 ,  H01M4/505 ,  H01M4/131 ,  H01M4/58 ,  H01M4/525 ,  B82B1/00 ,  H01M4/02

Abstract: Provided is a conductive composition for electrodes, the conductive composition having excellent electrical conductivity and dispersibility. Also provided are: a positive electrode for non-aqueous batteries, the positive electrode using the conductive composition and having low electrode plate resistance and excellent binding properties; and a non-aqueous battery having high energy density, high output characteristics, and high cycle characteristics. The conductive composition for electrodes contains a conductive material, an active material, a binder, and a dispersant, wherein the conductive material contains carbon black and a multi-walled carbon nanotube having a powder resistivity of 0.035 Ω·cm or less as measured under a load of 9.8 MPa, and a median volumetric diameter D50 value, which is as a measure of dispersibility, in the range of 0.3-8 μm The positive electrode which is for non-aqueous batteries and has low electrode plate resistance and excellent binding properties; and the non-aqueous battery having high output characteristics and high cycle characteristics are obtained by using the conductive composition in which the content of the multi-walled carbon nanotube in the conductive material is 3-50 mass %.

公开(公告)号：US11208741B2

公开(公告)日：2021-12-28

申请号：US15753138

申请日：2016-07-15

Applicant: DENKA COMPANY LIMITED

Inventor： Toru Arai ,  Hitoshi Kaneko

IPC: H01B1/22 ,  C08K3/00 ,  D01F9/00 ,  D01F9/127 ,  B01J23/75 ,  B01J23/755 ,  C09D5/24 ,  H01B1/24 ,  C08K3/04 ,  C08L101/00 ,  C09D11/037 ,  C09D201/00 ,  D01F9/32 ,  C09D7/40 ,  H01M4/13 ,  B01J21/06 ,  B01J21/18 ,  B01J23/02 ,  C09D11/52 ,  H01M4/62

Abstract: An object of the present invention is to provide a method for a carbon nanofiber composite, which can obtain a carbon nanofiber composite with high productivity and high activity, and which does not require removal of fluidizing materials or dispersing materials. The present invention also provides a carbon nanofiber composite having improved dispersibility. The method for producing the carbon nanofiber composite includes bringing at least one catalyst and at least one particulate carbon material into contact with at least one gas containing at least one gaseous carbon-containing compound while mechanically stirring the catalyst and the particulate carbon material in a reactor. The carbon nanofiber composite includes carbon nanofibers and at least one particulate carbon material, wherein the particulate carbon material has 70% by volume or more of particles with a particle diameter of 1 μm or less, and/or a median diameter D50 by volume of 1 μm or less.

公开(公告)号：US20180347073A1

公开(公告)日：2018-12-06

申请号：US15753138

申请日：2016-07-15

Applicant: DENKA COMPANY LIMITED

Inventor： Toru Arai ,  Hitoshi Kaneko

IPC: D01F9/127 ,  C08K3/04 ,  C09D5/24 ,  C09D7/40 ,  C09D11/52 ,  B01J23/75 ,  B01J23/755 ,  B01J23/02 ,  B01J21/06 ,  B01J21/18 ,  H01M4/62

CPC classification number: B01J23/75 ,  B01J23/755 ,  C08K3/041 ,  C08K3/046 ,  C08L101/00 ,  C09D5/24 ,  C09D7/40 ,  C09D11/037 ,  C09D201/00 ,  H01B1/00 ,  H01B1/04 ,  H01B1/24 ,  H01B5/00 ,  H01B13/00 ,  H01M4/62

Abstract: An object of the present invention is to provide a method for a carbon nanofiber composite, which can obtain a carbon nanofiber composite with high productivity and high activity, and which does not require removal of fluidizing materials or dispersing materials. The present invention also provides a carbon nanofiber composite having improved dispersibility. The method for producing the carbon nanofiber composite includes bringing at least one catalyst and at least one particulate carbon material into contact with at least one gas containing at least one gaseous carbon-containing compound while mechanically stirring the catalyst and the particulate carbon material in a reactor. The carbon nanofiber composite includes carbon nanofibers and at least one particulate carbon material, wherein the particulate carbon material has 70% by volume or more of particles with a particle diameter of 1 μm or less, and/or a median diameter D50 by volume of 1 μm or less.

公开(公告)号：US10087557B2

公开(公告)日：2018-10-02

申请号：US15748350

申请日：2016-07-25

Applicant: Denka Company Limited

Inventor： Hitoshi Kaneko ,  Toru Arai ,  Yoko Horikoshi ,  Ayumu Tsukamoto

IPC: D01F9/127 ,  B01J35/10 ,  C01B32/168 ,  B01J23/75 ,  B82Y40/00

Abstract: Provided is a method for producing carbon nanofibers having excellent conductivity, crystallinity and dispersibility. A method for producing carbon nanofibers, which uses an activated species mainly composed of cobalt as a catalyst, while using carbon monoxide as a carbon source. The catalyst is obtained by having a carrier, which is composed of an oxide having a specific surface area of 0.01-5 m2/g and containing magnesium, support 3-90% by mass of the activated species. By controlling the reaction temperature, the carbon monoxide partial pressure and the gas flow rate of the carbon monoxide, CNF having more excellent conductivity, crystallinity and dispersibility can be produced, thereby obtaining carbon nanofibers having excellent conductivity, crystallinity and dispersibility.