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Positive electrode for lithium ion secondary battery and lithium ion secondary battery including the same

  • US 9,608,288 B2
  • Filed: 07/16/2015
  • Issued: 03/28/2017
  • Est. Priority Date: 07/17/2014
  • Status: Active Grant
First Claim
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1. A positive electrode for a lithium ion secondary battery, the positive electrode comprising:

  • a coated particle comprising a positive active material particle and a reactive layer on a surface of the positive active material particle; and

    a sulfide-containing solid electrolyte particle which is in contact with the coated particle,wherein the reactive layer comprises a reactive element other than lithium and oxygen, wherein the reactive element has a reactivity with the sulfide-containing solid electrolyte particle which is greater than a reactivity of the reactive element with a transition metal element included in the positive active material particle,wherein the reactive element comprises at least one selected from aluminum, magnesium, zirconium, titanium, tantalum, sodium, potassium, calcium, strontium, barium, indium, molybdenum, lanthanum, cobalt, and manganese, andwherein a content of the reactive layer, other than lithium and oxygen, consists of the reactive element, andwherein a ratio of a thickness of the reactive layer to a particle diameter of the positive active material particle is in a range of about 0.0010 to about 0.25.

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