US 12,148,924 B2
Anode active material for non-aqueous electrolyte secondary battery, anode, battery, and laminate
Takitaro Yamaguchi, Tsukuba (JP); Hiroaki Hoshikawa, Niihama (JP); and Toshiaki Kumagai, Niihama (JP)
Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Appl. No. 17/295,034
Filed by SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
PCT Filed Oct. 17, 2019, PCT No. PCT/JP2019/040910
§ 371(c)(1), (2) Date May 18, 2021,
PCT Pub. No. WO2020/105330, PCT Pub. Date May 28, 2020.
Claims priority of application No. 2018-219613 (JP), filed on Nov. 22, 2018.
Prior Publication US 2022/0013769 A1, Jan. 13, 2022
Int. Cl. H01M 4/46 (2006.01); H01M 4/02 (2006.01); H01M 4/134 (2010.01); C22C 21/00 (2006.01); C22C 21/02 (2006.01); C22C 21/06 (2006.01)
CPC H01M 4/463 (2013.01) [H01M 4/134 (2013.01); C22C 21/00 (2013.01); C22C 21/02 (2013.01); C22C 21/06 (2013.01); H01M 2004/027 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An anode active material for a non-aqueous electrolyte secondary battery, the anode active material comprising:
an aluminum phase; and
a non-aluminum metal phase dispersed in the aluminum phase,
wherein the non-aluminum metal phase is formed of a non-aluminum metal compound containing one or more selected from the group consisting of Si, Ge, Sn, Ag, Sb, In, and Mg,
an amount of the non-aluminum metal phase with respect to a total amount of the aluminum phase and the non-aluminum metal phase is 0.01 mass % or more and 8 mass % or less, and
the non-aluminum metal phase observed in a case of observing a cross section of a foil-shaped anode active material having a thickness of 0.5 mm satisfies the following conditions (1) and (2),
condition (1): a number density of non-aluminum metal phase having a particle size of 0.1 μm2 or more and less than 100 μm2 is 1000 particles/mm2 or less, condition (2): a number density of non-aluminum metal phase having a particle size of 100 μm2 or more is 25 particles/mm2 or less.