Title:
負極活物質およびそれを用いたリチウムイオン二次電池
Document Type and Number:
Japanese Patent JP6984584
Kind Code:
B2
Abstract:
A negative electrode active material constituting a lithium ion secondary battery having high energy density and excellent cycle characteristics, and a negative electrode and a lithium ion secondary battery comprising the same are provided. The present invention relates to a negative electrode active material comprising graphite particles and crystalline silicon particles, wherein a median diameter of the crystalline silicon particles is 0.7 μm or less, and a weight ratio of the crystalline silicon particles to the total weight of the graphite particles and the crystalline silicon particles is 1 wt % or more and 25 wt % or less.
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Inventors:
Daisuke Kawasaki
Takashi Otsuka
Takashi Tamai
Noboru Yoshida
Shinya Sudo
Takashi Otsuka
Takashi Tamai
Noboru Yoshida
Shinya Sudo
Application Number:
JP2018503073A
Publication Date:
December 22, 2021
Filing Date:
February 22, 2017
Export Citation:
Assignee:
NEC
International Classes:
H01M4/38; H01M4/133; H01M4/134; H01M4/36; H01M4/48; H01M4/587; H01M4/62; H01M10/052; H01M10/0566; H01M10/058
Domestic Patent References:
| JP2008027897A | ||||
| JP2010092830A | ||||
| JP2015035317A | ||||
| JP2015079621A | ||||
| JP2004139886A |
Foreign References:
| WO2013151047A1 | ||||
| WO2015098050A1 |
Attorney, Agent or Firm:
Katsuhiro Ito