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US 10,256,463 B2Granted
Composite anode active material, anode and lithium battery containing the material, and method of preparing the composite anode active material
AssigneeSamsung SDI Co., Ltd.
InventorsXianhui Meng, Sanghyuck Ahn, Sukyung Lee, Yeongap Kim, Youngjin Choi, Deokhyun Kim
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Abstract
Provided is a composite anode active material with pores having a composition represented by Formula 1, and, the composite anode active material contains an amorphous phase including Si and a nano-crystalline phase including a metal silicide: SixMyCz <Formula 1> wherein, in Formula 1, x, y, and z each represent an atomic percentage; x+y+z=100; x>y+z; x>0, y>0, and z≥0; and M is at least one metal selected from Mn, Mo, Nb, W, Ta, Fe, Cu, Ni, Co, Zr, Y, and a combination thereof.
Claims17
A composite anode active material comprising:
- a composition represented by Formula 1;
- and
- a multi-phase microstructure containing an amorphous phase comprising Si and a nano-crystalline phase comprising a metal silicide;
- wherein the multi-phase microstructure further comprises a nano-crystalline phase formed of a metal M;
- and
- wherein the composite anode active material is porous
- wherein pores are distributed non-uniformly within the multi-phase microstructure:
- SixMyCz <Formula 1>
- wherein, in Formula 1,
- x, y, and z each represent an atomic percentage;
- x+y+z=100;
- x>y+z;
- x>0, y>0, and z≥0;
- and
- M is at least one metal selected from Mn, Mo, Nb, W, Ta, Fe, Cu, Ni, Co, Zr, Y, and a combination thereof.
12 more elements
Dependencies are inferred from the claim text.