METHOD OF PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE PLATE, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
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United States of America Patent
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Oct 17, 2024
app pub date -
Apr 11, 2024
filing date -
Apr 11, 2024
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Abstract
The present disclosure relates to a method of producing a positive electrode active material, the method comprising: a preparation step that involves preparing aggregate particles including a nickel-cobalt-manganese-based compound having a ratio of nickel of 75 mol % or more; a first treatment step that involves treating a surface of the aggregate particles with a fluorine-based compound at a temperature of 80° C. or more; and a second treatment step that involves treating the surface of the aggregate particles after the first treatment step, with at least one selected from the group consisting of a lithium-containing metal oxide and lithium borate. The present disclosure makes it possible to provide a positive electrode active material capable of reducing degradation of storage properties, a method of producing the same, as well as a positive electrode plate and a non-aqueous electrolyte secondary battery including the same.
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