Positive electrode material and preparation method thereof, positive electrode and lithium ion battery

• Main Authors: ZHU CHENGLING, MO FANGJIE, SUN HUAYU, YAN YONGSI, YANG WENLONG, YANG YUANYING
• Format: Patent
• Language: Chinese; English
• Published: 19.07.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a positive electrode material and a preparation method thereof, a positive electrode and a lithium ion battery. The positive electrode material comprises nickel cobalt lithium manganate, the chemical formula of the nickel cobalt lithium manganate is LiNi < x > Co < y > Mn < 1-x-y > O < 2 >, x is more than 0.5 and less than or equal to 0.8, and y is more than or equal to 0.01 and less than or equal to 0.2; the surfaces of nickel cobalt lithium manganate particles are coated with metal elements, and the metal elements comprise zirconium, tungsten, strontium, aluminum and titanium; wherein the content of zirconium in the positive electrode material is 1200 to 2800 ppm, the content of tungsten in the positive electrode material is 2000 to 5000 ppm, the content of strontium in the positive electrode material is 50 to 600 ppm, the content of aluminum in the positive electrode material is 400 to 1500 ppm, and the content of titanium in the positive electrode material is 300 to 1300 ppm. A bat