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US 8,012,626 B2Granted
Electrode active material powder with size dependent composition and method to prepare the same
AssigneeLG Chem, Ltd.
InventorsJens Martin Paulsen, Hong Kyu Park, Mun Ju Kim
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Abstract
The present invention relates to a powderous electrode active material of lithium transition metal oxide LiaMbO2, wherein 0.9<a<1.1, 0.9<b<1.1 and M is dominantly transition metal chosen from Mn, Co and Nickel, having particles with a distribution of sizes, where the composition M varies with the size of the particles, and a preparation method thereof. The present invention also relates to an electrochemical cell, particularly rechargeable lithium battery, using the powderous electrode active material.
Claims36
A powderous electrode active material comprising:
- a lithium transition metal oxide LiaMbO2,
- where 0.9<a<1.1, 0.9<b<1.1 and M comprises MnxNiyCo1−x−y, 0≦y≦1, 0≦x≦1, said material having particles with a distribution of sizes, and
- where the content of Mn, Co and Ni in M varies with the size of the particles.
A powderous electrode active material comprising:
- a lithium transition metal oxide LiaMbO2,
- where 0.9<a<1.1, 0.9<b<1.1 and M comprises MnxNiyCo1−x−y, 0≦y≦1, 0≦x≦1,
- said material having particles with a layered crystal structure, and having a broad particle size distribution with d90/d10>2, and
- where the content of Mn, Co and Ni in M varies with the size of the particles.
1 more element
Dependencies are inferred from the claim text.