US 12,444,735 B2
Si alloy powder for negative electrode
Yuta Kimura, Nagoya (JP); Kyohei Shimomura, Nagoya (JP); and Hiroyuki Ohisa, Nagoya (JP)
Assigned to Daido Steel Co., Ltd., Nagoya (JP)
Filed by DAIDO STEEL CO., LTD., Nagoya (JP)
Filed on Jul. 28, 2023, as Appl. No. 18/227,319.
Claims priority of application No. 2022-121838 (JP), filed on Jul. 29, 2022; and application No. 2023-048355 (JP), filed on Mar. 24, 2023.
Prior Publication US 2024/0038976 A1, Feb. 1, 2024
Int. Cl. H01B 1/04 (2006.01); C01B 33/06 (2006.01); H01M 4/38 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/386 (2013.01) [C01B 33/06 (2013.01); H01B 1/04 (2013.01); C01P 2002/70 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A Si alloy powder for a negative electrode, the Si alloy powder comprising:
a Si phase;
a SiX compound phase; and
at least one selected from the group consisting of a SnY compound phase and a AlY compound phase, wherein
the element Y in the SnY compound phase and the AlY compound phase comprises at least one element selected from the group consisting of Cu, Fe, Ni, Cr, Co, Mn, Zr, and Ti,
the Si alloy powder has an average particle diameter of 30 μm or less, and
an amount of the Si phase in an entire Si alloy is 30 mass % to 95 mass %,
wherein the element X in the Six compound phase comprises at least one element selected from the group consisting of B, C, Mg, Ca, and V.