公开(公告)号：US11456447B2

公开(公告)日：2022-09-27

申请号：US16971968

申请日：2019-02-21

Applicant: NISSAN MOTOR CO., LTD. ,  JSR Corporation

Inventor： Shotaro Doi ,  Yuki Kusachi ,  Noboru Yamauchi ,  Tomohiro Kaburagi ,  Hideaki Horie ,  Yusuke Nakashima ,  Kazuya Tsuchida ,  Naofumi Shoji ,  Koji Sumiya ,  Shigehito Asano ,  Yasuyuki Koga ,  Nobuo Ando ,  Terukazu Kokubo

IPC: H01M4/04 ,  H01G11/86 ,  H01M10/0525 ,  H01M4/02

Abstract: A predoping method for a negative electrode active material to dope the negative electrode active material with lithium ions. The predoping method for a negative electrode active material includes: a predoping process and a post-doping modification process. In the predoping process, the negative electrode active material is doped with lithium ions, to thereby reduce a potential of the negative electrode active material relative to lithium metal. In the post-doping modification process, after the predoping process, reaction is caused between a reactive compound that is reactive with lithium ions and lithium ions doped into the negative electrode active material, to thereby increase the potential of the negative electrode active material relative to lithium metal. The potential of the negative electrode active material relative to lithium metal is 0.8 V or more at completion of the post-doping modification process.

公开(公告)号：US12068471B2

公开(公告)日：2024-08-20

申请号：US16971865

申请日：2019-02-21

Applicant: NISSAN MOTOR CO., LTD.

Inventor： Shotaro Doi ,  Yuki Kusachi ,  Noboru Yamauchi ,  Tomohiro Kaburagi ,  Hideaki Horie ,  Yusuke Nakashima ,  Kazuya Tsuchida ,  Naofumi Shoji ,  Koji Sumiya ,  Shigehito Asano ,  Yasuyuki Koga ,  Nobuo Ando ,  Terukazu Kokubo

IPC: H01M4/04 ,  H01G11/06 ,  H01G11/50 ,  H01G11/86 ,  H01M4/139 ,  H01M10/0525 ,  H01M10/0566 ,  H01M4/02

CPC classification number: H01M4/049 ,  H01G11/06 ,  H01G11/50 ,  H01G11/86 ,  H01M4/139 ,  H01M10/0525 ,  H01M10/0566 ,  H01M2004/027 ,  H01M2300/0014 ,  H01M2300/0025

Abstract: A predoping method for a negative electrode active material to dope the negative electrode active material with lithium ions using an electrolyte solution that includes lithium ions. The electrolyte solution includes at least one type of additive having a reduction potential higher than a reduction potential of a solvent contained in the electrolyte solution.

公开(公告)号：US10673057B2

公开(公告)日：2020-06-02

申请号：US16470610

申请日：2017-12-19

Applicant: NISSAN MOTOR CO., LTD.

Inventor： Kazuya Tsuchida ,  Yusuke Nakashima ,  Yasuhiko Ohsawa ,  Yuki Kusachi ,  Hajime Satou ,  Hiroshi Akama ,  Hideaki Horie

IPC: H01M4/04 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/02

Abstract: To provide a negative electrode for a lithium ion battery in which a volume change of a silicon-based negative electrode active material due to charging and discharging is small, and a production method therefor.Provided is a method for producing a negative electrode for a lithium ion battery, the method including a step of forming a coating film on a current collector or a separator by using a slurry containing a negative electrode active material composition, which contains a silicon-based negative electrode active material and a carbon-based negative electrode active material, and a dispersion medium, in which the method further includes a step of doping the silicon-based negative electrode active material with lithium ions and a step of doping the carbon-based negative electrode active material with lithium ions before or after the step of forming the coating film and before assembling a lithium ion battery, and the method does not substantially include a step of drying the coating film.