US 11,658,289 B2
Negative electrode active material, mixed negative electrode active material, and method for producing negative electrode active material
Takakazu Hirose, Annaka (JP); and Hiromichi Kamo, Takasaki (JP)
Assigned to SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
Filed by SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
Filed on Jun. 2, 2021, as Appl. No. 17/336,723.
Application 17/336,723 is a continuation of application No. 16/091,307, granted, now 11,139,469, previously published as PCT/JP2017/014662, filed on Apr. 10, 2017.
Claims priority of application No. JP2016-106973 (JP), filed on May 30, 2016.
Prior Publication US 2021/0296636 A1, Sep. 23, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/36 (2006.01); C01B 33/32 (2006.01); H01M 4/587 (2010.01); H01M 4/48 (2010.01); H01M 4/38 (2006.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/364 (2013.01) [C01B 33/32 (2013.01); H01M 4/36 (2013.01); H01M 4/366 (2013.01); H01M 4/38 (2013.01); H01M 4/48 (2013.01); H01M 4/58 (2013.01); H01M 4/587 (2013.01); H01M 4/5825 (2013.01); H01M 4/625 (2013.01); C01P 2002/60 (2013.01); C01P 2002/72 (2013.01); C01P 2002/86 (2013.01); C01P 2004/61 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A negative electrode comprising a negative electrode active material layer, wherein
the negative electrode active material layer has a negative electrode active material including a negative electrode active material particle,
the negative electrode active material particle comprises a silicon compound particle comprising a silicon compound (SiOx: 0.5≤x≤1.6),
the silicon compound particle comprises crystalline Li2SiO3 in at least part of the silicon compound particle,
among a peak intensity A derived from Li2SiO3, a peak intensity B derived from Si, a peak intensity C derived from Li2Si2O5, and a peak intensity D derived from SiO2 which are obtained from a 29Si-MAS-NMR spectrum of the silicon compound particle, the peak intensity A is the highest intensity, and
the peak intensity A and the peak intensity C satisfy a relationship of the following formula 1,
formula 1: 3C<A.