-
公开(公告)号：US20180323433A1
公开(公告)日：2018-11-08
申请号：US15770866
申请日：2016-10-27
Applicant: KURARAY CO., LTD. , KUREHA CORPORATION
Inventor： Tomohiro KAWAKAMI , Sayaka IDE , Takafumi IZAWA , Taketoshi OKUNO , Jun-Sang CHO , Hideharu IWASAKI
IPC: H01M4/587 , H01M10/0525 , C01B32/05
CPC classification number: H01M4/587 , C01B32/05 , C01P2002/76 , C01P2002/78 , C01P2004/61 , C01P2006/10 , C01P2006/12 , C01P2006/40 , C01P2006/80 , H01M10/0525 , H01M2004/021 , H01M2004/027
Abstract: An object of the present invention is to provide a carbonaceous material (carbonaceous material for a non-aqueous electrolyte secondary battery) used for a negative electrode of a non-aqueous electrolyte secondary battery (e.g., a lithium ion secondary battery) exhibiting favorable charge/discharge capacities and low resistance and having favorable resistance to oxidative degradation. The present invention relates to 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 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：US20180309126A1
公开(公告)日：2018-10-25
申请号：US15770767
申请日：2016-10-27
Applicant: KURARAY CO., LTD. , KUREHA CORPORATION
Inventor： Tomohiro KAWAKAMI , Takafumi IZAWA , Taketoshi OKUNO , Jun-Sang CHO , Hideharu IWASAKI
IPC: H01M4/583 , H01M4/133 , H01M10/0525
CPC classification number: H01M4/583 , H01M4/133 , H01M4/587 , H01M10/0525 , H01M2004/021 , H01M2004/027
Abstract: An object of the present invention is to provide a carbonaceous material (carbonaceous material for a non-aqueous electrolyte secondary battery) used for a negative electrode of a non-aqueous electrolyte secondary battery (e.g., a lithium ion secondary battery) exhibiting favorable charge/discharge capacities and low resistance and having favorable resistance to oxidative degradation. The present invention relates to 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 4 μm according to a laser scattering method.
-
公开(公告)号：US20210098788A1
公开(公告)日：2021-04-01
申请号：US16628189
申请日：2018-07-04
Applicant: KURARAY CO., LTD.
Inventor： Takafumi IZAWA , Kengo TACHIKAWA , Hideharu IWASAKI
IPC: H01M4/587 , H01M10/052 , C01B32/05
Abstract: The present invention provides a carbonaceous material suitable for a negative electrode active material for non-aqueous electrolyte secondary batteries (e.g., lithium ion secondary batteries, sodium ion secondary batteries, lithium sulfur batteries, lithium air batteries) having high charge/discharge capacities, and preferably high charge/discharge efficiency and low resistance, a negative electrode comprising the carbonaceous material, a non-aqueous electrolyte secondary battery comprising the negative electrode, and a production method of the carbonaceous material. The present invention relates to a carbonaceous material having a nitrogen content obtained by elemental analysis of 3.5 mass % or more, a ratio of nitrogen content and hydrogen content (RN/H) of 6 or more and 100 or less, a ratio of oxygen content and nitrogen content (RO/N) of 0.1 or more and 1.0 or less, and a carbon interplanar spacing (d002) observed by X-ray diffraction measurement of 3.70 Å or more.
-
公开(公告)号：US20190194024A1
公开(公告)日：2019-06-27
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 , C01B32/30 , C01B32/336 , H01M4/04 , H01M4/587
CPC classification number: C01B32/318 , C01B32/30 , C01B32/336 , H01M4/0471 , H01M4/587 , H01M2004/027 , H01M2220/20
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：US20210094826A1
公开(公告)日：2021-04-01
申请号：US16628191
申请日：2018-07-04
Applicant: KURARAY CO., LTD.
Inventor： Takafumi IZAWA , Kengo TACHIKAWA , Hideharu IWASAKI
IPC: C01B32/05
Abstract: A problem to be solved by the present invention is to provide a carbonaceous material suitable for a negative electrode active material for non-aqueous electrolyte secondary batteries (e.g., lithium ion secondary batteries, sodium ion secondary batteries, lithium sulfur batteries, lithium air batteries) having high charge/discharge capacities and preferably high charge/discharge efficiency as well as low resistance, a negative electrode comprising the carbonaceous material, a non-aqueous electrolyte secondary battery comprising the negative electrode, and a production method of the carbonaceous material. The present invention relates to a carbonaceous material having a nitrogen element content of 1.0 mass % or more and an oxygen content of 1.5 mass % or less obtained by elemental analysis, a ratio of nitrogen element content and hydrogen element content (RN/H) of 6 or more and 100 or less, a ratio of oxygen element content and nitrogen element content (RO/N) of 0.1 or more and 1.0 or less, and a carbon interplanar spacing (d002) observed by X-ray diffraction measurement of 3.70 Å or more.
