Positive electrode active material particle powder for non-aqueous electrolyte secondary battery, method for producing same, and non-aqueous electrolyte secondary battery

  • US 11,127,940 B2
  • Filed: 12/12/2019
  • Issued: 09/21/2021
  • Est. Priority Date: 11/20/2014
  • Status: Active Grant
First Claim
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1. A method of producing positive electrode active material particle powder for a non-aqueous electrolyte secondary battery, the method comprising:

  • mixing trimanganese tetroxide, a lithium compound, and a niobium compound or a molybdenum compound as a crystal plane growth suppressor to form a mixture; and

    firing the mixture in an oxidizing atmosphere at a temperature from 700°

    C. to 950°

    C.,wherein in X-ray diffraction analysis of the positive electrode active material particle powder, a cubic spinel phase composed of Li and Mn, and a phase of a compound of Nb and Li, or Mo and Li are present.

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