Positive Electrode Material and Preparation Method Thereof, and Lithium Ion Battery

Abstract

Provided are a positive electrode material and a preparation method thereof, and a lithium ion battery. The preparation method includes: performing first mixing on a first lithium source, a metal phthalocyanine complex, a first manganese source, and a first phosphorus source to obtain a first mixed system containing a seed crystal; performing second mixing on the first mixed system, a second lithium source, an iron source, a second manganese source, and a second phosphorus source to obtain a second mixed system containing a precursor; and sintering the second mixed system in a protective atmosphere to obtain a positive electrode material, where a molar ratio of the first lithium source, the first manganese source, and the first phosphorus source is a1:x1:1, a1 is 1.01 to 1.03, and x1 is 0.5 to 0.8; and a molar ratio of the second lithium source, the iron source, the second manganese source, and the second phosphorus source is a2:(1−x2):x2:1, a2 is 1.03 to 1.10, and x2 is 0.5 to 0.8. The positive electrode material has excellent compaction density and structural stability. Provided are a positive electrode material and a preparation method thereof, and a lithium ion battery. The preparation method includes: performing first mixing on a first lithium source, a metal phthalocyanine complex, a first manganese source, and a first phosphorus source to obtain a first mixed system containing a seed crystal; performing second mixing on the first mixed system, a second lithium source, an iron source, a second manganese source, and a second phosphorus source to obtain a second mixed system containing a precursor; and sintering the second mixed system in a protective atmosphere to obtain a positive electrode material. The positive electrode material has excellent compaction density and structural stability.

Dependencies are inferred from the claim text.