US 11,990,603 B2
Negative electrode material, method of producing the negative electrode material, and mixed negative electrode material
Takumi Matsuno, Annaka (JP); Takakazu Hirose, Annaka (JP); and Kohta Takahashi, Takasaki (JP)
Assigned to SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
Appl. No. 16/477,686
Filed by SHIN-ETSU CHEMICAL CO., LTD., Tokyo (JP)
PCT Filed Feb. 26, 2018, PCT No. PCT/JP2018/006849
§ 371(c)(1), (2) Date Jul. 12, 2019,
PCT Pub. No. WO2018/168411, PCT Pub. Date Sep. 20, 2018.
Claims priority of application No. 2017-047841 (JP), filed on Mar. 13, 2017.
Prior Publication US 2019/0341602 A1, Nov. 7, 2019
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/134 (2013.01) [H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/364 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A negative electrode material comprising a negative electrode active material particle;
the negative electrode active material particle comprising a silicon compound particle containing a silicon compound: SiOx, where 0.5≤x≤1.6,
wherein the silicon compound particle contains at least one or more of Li2SiO3 and Li4SiO4,
the negative electrode material further comprises at least one of a) a metal compound particle and b) an aggregate of the metal compound particle,
the metal compound particle contains at least one selected from the group consisting of an oxide, a phosphate and a silicate of at least one selected from the group consisting of aluminum, zirconium, and yttrium,
the metal compound particle has an average primary particle size of 0.1 μm or more and 4 μm or less,
the aggregate of the metal compound particle has an average secondary particle size of 0.1 μm or more and 20 μm or less, and
the negative electrode material is produced by mixing the at least one of a) the metal compound particle and b) the aggregate of the metal compound particle with the negative electrode active material particle containing the silicon compound particle.