Nissan Motor Company Limited

Jsr Corporation

Kazuya Tsuchida

Hideaki Horie

Yuki Kusachi

Yusuke Nakashima

Koji Sumiya

Yasuyuki Koga

Nobuo Ando

Tomohiro Kaburagi

Terukazu Kokubo

Naofumi Shoji

Shigehito Asano

Noboru Yamauchi

Shotaro Doi

Yasuhiko Ohsawa

Hiroshi Akama

Hajime Satou

Takumi Hatazoe

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.

Predoping method for negative electrode active material, manufacturing method for negative electrode, and manufacturing method for power storage device

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.

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.

Negative electrode for lithium ion battery and method for producing negative electrode for lithium ion battery

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Kanagawa, Japan

Kazuya Tsuchida