NICKEL-BASED ACTIVE MATERIAL, POSITIVE ELECTRODE INCLUDING THE SAME, AND LITHIUM SECONDARY BATTERY EMPLOYING THE POSITIVE ELECTRODE

• Main Authors: HASE, Naoyuki, KWAK, Taehee, HA, Jeuk, KIM, Minkyu, AHN, Kiyong, SONG, Yumi, OH, Eunok, KWON, Seonyoung
• Format: Patent
• Language: English; French; German
• Published: 18.05.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A nickel-based active material, a positive electrode including the same, and a lithium secondary battery including the positive electrode, a negative electrode, and an electrolyte between the positive electrode and the negative electrode are provided. The nickel-based active material includes 80 mol% or more of nickel with respect to the metal elements excluding lithium, and the nickel-based active material includes: i) large secondary particles having a size in a range of 10 µm to 20 µm and including aggregates of primary particles having a size of 1 µm or less; ii) large crystal particles including primary particles having a size in a range of 1 µm to 5 pm; and iii) small secondary particles having a size in a range of 1 µm to 7 µm and including aggregates of primary particles having a size of 1 µm or less.