Electrode active material powder with size dependent composition and method to prepare the same

  • US 7,771,877 B2
  • Filed: 12/30/2004
  • Issued: 08/10/2010
  • Est. Priority Date: 12/31/2003
  • Status: Active Grant
First Claim
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1. 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 is a mixture of at least two transition metals selected from the group consisting of Mn, Co and Ni,said material having particles with a distribution of sizes,where the content of Mn, Co and Ni in M varies with the size of the particles.

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