US 12,300,812 B2
Active material, anode layer, battery, and methods for producing these
Mitsutoshi Otaki, Susono (JP); Jun Yoshida, Mishima (JP); Kazuhiro Suzuki, Hadano (JP); and Masanori Harata, Kariya (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Sep. 21, 2023, as Appl. No. 18/370,967.
Application 18/370,967 is a division of application No. 17/210,824, filed on Mar. 24, 2021, granted, now 11,799,076.
Claims priority of application No. 2020-058556 (JP), filed on Mar. 27, 2020.
Prior Publication US 2024/0014389 A1, Jan. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/36 (2006.01); C01B 33/021 (2006.01); H01B 1/04 (2006.01); H01M 4/134 (2010.01); H01M 4/1395 (2010.01); H01M 4/38 (2006.01); H01M 10/0525 (2010.01); H01M 10/44 (2006.01)
CPC H01M 4/386 (2013.01) [C01B 33/021 (2013.01); H01B 1/04 (2013.01); H01M 4/134 (2013.01); H01M 4/1395 (2013.01); H01M 4/366 (2013.01); H01M 10/0525 (2013.01); H01M 10/44 (2013.01); C01P 2002/74 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for producing an active material, the method comprising:
a preparing step of preparing an intermediate including a silicon clathrate II type crystal phase,
an alloying step of obtaining an alloy compound by alloying the intermediate and a Li based material so as a molar ratio (Li/Si) of Li included in the Li based material to Si included in the intermediate is 3 or less, and
a Li removing step of removing the Li from the alloy compound and forming a void inside a primary particle,
wherein the Li/Si is 0.5 or more.