Positive electrode active substance, positive electrode material, positive electrode, and non-aqueous electrolyte secondary battery

  • US 9,843,033 B2
  • Filed: 02/27/2014
  • Issued: 12/12/2017
  • Est. Priority Date: 02/28/2013
  • Status: Active Grant
First Claim
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1. A positive electrode active substance for a non-aqueous electrolyte secondary battery comprising a composite oxide containing lithium and nickel,wherein the positive electrode active substance has a structure of secondary particles formed by aggregation of primary particles, the arithmetic average particle diameter of primary particles (D1) is 0.25 to 0.48 μ

  • m, the arithmetic average particle diameter of secondary particles (D2) is 5.8 to 8.5 μ

    m, the ratio value (D2/D1)) of the arithmetic average particle diameter of the secondary particles (D2) to the arithmetic average particle diameter of the primary particles (D1) is 28.7 to 33.5, the tap density of the positive electrode active substance is 2.32 to 2.65 g/cm3, and the crystallite diameter of the positive electrode active substance is 0.10 to 0.15 μ

    m.

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