Electrode active material powder with size dependent composition and method to prepare the same
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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.
64 Citations
58 Claims
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1-22. -22. (canceled)
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23. A powderous electrode active material of lithium transition metal oxide LiaMbO2
where 0.9< - a<
1.1, 0.9<
b<
1.1 and M is dominantly transition metal chosen from Mn, Co and Nickelhaving particles with a distribution of sizes where the composition M varies with the size of the particles. - View Dependent Claims (24, 25, 26, 30, 31, 32, 33, 34, 37, 41, 42, 43, 47, 49, 50, 51, 52, 53)
- a<
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27. A powderous electrode active material of lithium transition metal oxide LiaMbO2
where 0.9< - a<
1.1, 0.9<
b<
1.1 and M is transition metal chosen from Mn, Co and Nickelthe particles have a layered crystal structure having a broad particle size distribution with d90/d10>
2where the composition M varies with the size of the particles. - View Dependent Claims (28, 29, 35, 36, 38, 39, 40, 44, 45, 46, 48, 54, 55, 56, 57, 58)
- a<
Specification