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US 11,688,852 B2Granted
Negative electrode active material including Al- and O-containing silicon material
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorYasuhiro Yamaguchi
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Abstract
A new silicon material is provided. A negative electrode active material including an Al- and O-containing silicon material, the Al- and O-containing silicon material being configured such that a mass % of Al (WAl %) satisfies 0<WAl<1, and a peak indicating Al—O bond is observed in a range of 1565 to 1570 eV in an X-ray absorption fine structure measurement for a K shell of Al.
Claims10
A negative electrode active material comprising
- an Al- and O-containing silicon material, the Al- and O-containing silicon material being configured such that
- a mass % of Al (WAl %) in the Al- and O-containing silicon material satisfies 0.25≤WAl≤1, and a peak indicating Al—O bond is observed in a range of 1565 to 1570 eV in an X-ray absorption fine structure measurement for a K shell of Al,
- a mass % of Fe (WFe %) in the Al- and O-containing silicon material satisfies 0≤WFe≤0.3,
- a mass % of Si (WSi %) in the Al- and O-containing silicon material satisfies 60≤WSi≤90,
- a mass % of O (WO %) in the Al- and O-containing silicon material satisfies 5≤WO≤30, and
- a relationship between the mass % of Al (WAl%) and a mass % of Fe (WFe %) satisfies WAl>WFe.
3 more elements
Dependencies are inferred from the claim text.