公开(公告)号：US10446837B2

公开(公告)日：2019-10-15

申请号：US15015433

申请日：2016-02-04

申请人： SHIN-ETSU CHEMICAL CO., LTD.

发明人： Hiromichi Kamo ,  Kenta Fujisaki ,  Takumi Matsuno ,  Takakazu Hirose ,  Hiroki Yoshikawa

IPC分类号： H01M4/36 ,  H01M4/134 ,  H01M4/38 ,  H01M4/485 ,  H01M4/587 ,  H01M4/62 ,  H01M10/052 ,  H01M10/0525 ,  H01M4/583 ,  H01M4/48

摘要： A negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx where 0.5≤x≤1.6, the negative electrode active material particles at least partially coated with a carbon coating, the carbon coating exhibiting a specific surface area ranging from 5 m2/g to 1000 m2/g, the specific surface area being measured by a multipoint BET method after the carbon coating is separated from the negative electrode active material particles, the carbon coating exhibiting a compression resistivity ranging from 1.0×10−3 Ω·cm to 1.0 Ω·cm when the carbon coating is compressed so as to have a density of 1.0 g/cm3, the compression resistivity being measured after the carbon coating is separated from the negative electrode active material particles. This negative electrode active material can increase the battery capacity and improve the cycle performance and battery initial efficiency.

公开(公告)号：US09831495B2

公开(公告)日：2017-11-28

申请号：US15003902

申请日：2016-01-22

申请人： SHIN-ETSU CHEMICAL CO., LTD.

发明人： Hiromichi Kamo ,  Kenta Fujisaki ,  Takumi Matsuno ,  Takakazu Hirose ,  Hiroki Yoshikawa

IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M4/485 ,  H01M4/62 ,  H01M4/48 ,  H01M4/587 ,  H01M10/052 ,  H01M4/02

CPC分类号： H01M4/366 ,  H01M4/364 ,  H01M4/386 ,  H01M4/483 ,  H01M4/485 ,  H01M4/587 ,  H01M4/625 ,  H01M10/052 ,  H01M2004/021 ,  H01M2004/027

摘要： The present invention provides a negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx where 0.5≦x≦1.6, the negative electrode active material particles at least partially coated with a carbon coating, the carbon coating exhibiting a peak at 2θ=25.5° having a half width of 1.5° to 4.5° in an X-ray diffraction spectrum measured after separating the carbon coating from the negative electrode active material particles, the carbon coating exhibiting scattering peaks at 1330 cm−1 and 1580 cm−1 in Raman spectrum obtained by Raman spectrometry measured after separating the carbon coating from the negative electrode active material particles, wherein a ratio of an intensity of the scattering peak at 1330 cm−1 to that at 1580 cm−1 satisfies 0.7