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POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, BATTERY, BATTERY PACK, ELECTRONIC DEVICE, ELECTRIC VEHICLE, POWER STORAGE DEVICE, AND POWER SYSTEM

  • US 20170207444A1
  • Filed: 07/09/2015
  • Published: 07/20/2017
  • Est. Priority Date: 07/31/2014
  • Status: Active Grant
First Claim
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1. A positive electrode active material comprising:

  • a particle including a lithium composite oxide;

    a first layer that is provided on a surface of the particle and includes a lithium composite oxide; and

    a second layer that is provided on a surface of the first layer,wherein the lithium composite oxide included in the particle and the lithium composite oxide included in the first layer have the same composition or almost the same composition,the second layer includes an oxide or a fluoride, andthe lithium composite oxide included in the first layer has lower crystallinity than the lithium composite oxide included in the particle.

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