POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERIES, PREPARATION METHOD THEREOF AND RECHARGEABLE LITHIUM BATTERIES INCLUDING THE SAME
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United States of America Patent
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Issued Date -
Jun 20, 2024
app pub date -
Oct 3, 2023
filing date -
Oct 3, 2023
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Abstract
A positive active material includes a first positive active material in a secondary particle form in which a plurality of primary particles are aggregated, and a second positive active material in a single particle form, wherein each of the first positive active material and the second positive active material includes a lithium nickel-based composite oxide having a nickel content of greater than or equal to about 70 mol % relative to the total elements excluding lithium and excluding oxygen, the first positive active material includes a coating portion in a form of a film on the surface of the secondary particle, the second positive active material includes a coating portion in a form of a film on the surface of the single particle, the coating portion of the first positive active material and the coating portion of the second positive active material includes lithium cobalt oxide and cobalt oxyhydroxide, respectively.
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