CPC H01M 4/364 (2013.01) [H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] | 11 Claims |
1. A bimodal lithium transition metal oxide based powder mixture for a rechargeable battery, comprising:
a first lithium transition metal oxide based powder, comprising particles of a material A having a layered crystal structure comprising the elements Li, a transition metal based composition M and oxygen, the first powder having a particle size distribution characterized by a (D90−D10)/D50<1.0; and
a second lithium transition metal oxide based powder, comprising a material B having single crystal particles, said particles having a general formula Li1+bN′1-bO2, wherein −0.03≤b≤0.10, and N′=NixM″yCozEd, wherein 0.30≤x≤0.92, 0.05≤y≤0.40, 0.05≤z≤0.40 and 0≤d≤0.10, with M″ being one or both of Mn or Al, and with E being a dopant different from M″,
the first powder having an average particle size D50 between 10 and 40 μm, the second powder having an average particle size D50 between 2 and 4 μm; and wherein the weight ratio of the second powder in the bimodal mixture is between 15 and 60 wt %.
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