公开(公告)号：US20150263347A1

公开(公告)日：2015-09-17

申请号：US14424723

申请日：2013-08-30

Applicant: KUREHA CORPORATION ,  KURARAY CO., LTD. ,  KURARAY CHEMICAL CO., LTD.

Inventor： Makoto Imaji ,  Kenta Aoki ,  Yasuhiro Tada ,  Naohiro Sonobe ,  Junichi Arima ,  Kenichi Koyakumaru ,  Hideharu Iwasaki ,  Kiyoto Otsuka ,  Jiro Masuko ,  Hajime Komatsu ,  Shinya Tago

IPC: H01M4/583 ,  H01M10/05 ,  C01B31/02

CPC classification number: H01M4/587 ,  C01B32/05 ,  C01P2002/72 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/80 ,  H01M4/583 ,  H01M10/05 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity (discharge capacity), non-dedoping capacity (irreversible capacity), and charge-discharge efficiency.The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor (i.e. non-graphitizable carbon precursor, graphitizable carbon, or mixture thereof) or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less. Further, the object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heating plant-derived char, and hydrocarbon compound having 1 to 20 carbon atoms; and a specific surface area determined by a BET method is 15 m2/g or less.

Abstract translation: 本发明的目的是提供一种可从植物来源的炭获得并具有降低的比表面积的碳质材料。 此外，本发明的目的是提供一种具有优异的去掺杂能力（放电容量），非去掺杂能力（不可逆容量）和充放电效率的非水电解质二次电池。 该目的可以通过用于非水电解质二次电池的碳质材料来解决，其特征在于，通过热处理在气相中脱矿质的植物来源的碳，以及碳前体（即不可石墨化的碳前体 ，可石墨化碳或其混合物）或挥发性有机化合物; 通过BET法测定的比表面积为10m 2 / g以下。 此外，该目的可以通过用于非水电解质二次电池的碳质材料来解决，其特征在于，通过加热植物来源的炭和碳原子数1〜20的烃化合物而获得碳质材料; 通过BET法测定的比表面积为15m 2 / g以下。

公开(公告)号：US10573891B2

公开(公告)日：2020-02-25

申请号：US15409242

申请日：2017-01-18

Applicant: KURARAY CO., LTD.

Inventor： Makoto Imaji ,  Kenta Aoki ,  Yasuhiro Tada ,  Naohiro Sonobe ,  Junichi Arima ,  Kenichi Koyakumaru ,  Hideharu Iwasaki ,  Kiyoto Otsuka ,  Jiro Masuko ,  Hajime Komatsu ,  Shinya Tago

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

Abstract: The object of the present invention is to provide a carbonaceous material which is obtainable from plant-derived char and has a decreased specific surface area. Further, the object of the present invention is to provide a non-aqueous electrolyte secondary battery having excellent dedoping capacity, non-dedoping capacity, and charge-discharge efficiency. The object can be solved by a carbonaceous material for non-aqueous electrolyte secondary batteries characterized in that the carbonaceous material is obtained by heat-treating plant-derived char which is demineralized in gas-phase, and carbon precursor or volatile organic compound under a non-oxidizing gas atmosphere; and a specific surface area determined by a BET method is 10 m2/g or less.

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.