Solid Phase Synthesis Method of Positive Electrode Active Material of Nickel-Rich Lithium Composite Transition Metal Oxide in a Form of a Single Particle, Positive Electrode Active Material of Nickel-Rich Lithium Composite Transition Metal Oxide in a Form of a Single Particle Formed Therefrom, Positive Electrode and Lithium Secondary Battery Containing the Same
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United States of America Patent
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Sep 14, 2023
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Sep 24, 2021
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Sep 24, 2021
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Abstract
A positive electrode active material and a method of making the same are disclosed herein. In some embodiments, a method includes mixing transition metal raw powders including a nickel raw powder to prepare a first mixture, where the first mixture has a molar ratio of lithium to total transition metals of 0.95 to 1.02, and where a molar ratio of nickel to total transition metals is 80 mol % or more, sintering the first mixture in an oxygen-containing atmosphere, and cooling the sintered first mixture to obtain a first sintered product, mixing the first sintered product with a second lithium raw material to prepare a second mixture, where the second mixture has molar ratio of lithium to total transition metals of 1.00 to 1.09, and sintering the second mixture in the oxygen-containing atmosphere to prepare a lithium composite transition metal oxide in the form of a single particle.
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