Negative electrode active material and lithium secondary battery comprising the same
AssigneeLG Energy Solution, Ltd.
InventorsSung-Bin Park, Bo-Na Kim, Dae-Hong Kim, In-Sun Yoo, Wang-Mo Jung
Life of this patent
Estimating the term…
Abstract
A negative electrode active material for a secondary battery and a lithium secondary battery including the same. The negative electrode active material for a secondary battery, includes lithium titanium-based composite particles comprising: a lithium titanium oxide represented by LixTiyOz, wherein x, y and z satisfy 0.1≤x≤4, 1≤y≤5 and 2≤z≤12, Zr doped into the lithium titanium oxide; and an aluminum and sulfur containing compound coated on a surface of the lithium titanium oxide. The aluminum and sulfur containing compound is present in an amount of 0.4 mM to 0.9 mM based on 1M lithium titanium oxide.
Claims17
A negative electrode active material for a secondary battery, comprising:
- lithium titanium-based composite particles comprising:
- a lithium titanium oxide represented by LixTiyOz, wherein x, y and z satisfy 0.1≤x≤4, 1≤y≤5 and 2≤z≤12;
- Zr doped into the lithium titanium oxide;
- and
- an aluminum and sulfur containing compound coated on a surface of the lithium titanium oxide,
- wherein the aluminum and sulfur containing compound is present in an amount of 0.4 mM to 0.9 mM based on 1M lithium titanium oxide,
- wherein the aluminum and sulfur containing compound coated on the surface of the lithium titanium oxide forms an inter-diffusion layer on the surface, the inter-diffusion layer configured to block lithium ions from entering an 8a tetrahedral site of the lithium titanium oxide during high rate intercalation, and
- wherein the inter-diffusion layer comprises Al2S3.
Dependencies are inferred from the claim text.