SECONDARY BATTERY HAVING IMPROVED HIGH-TEMPERATURE PROPERTIES

• Main Authors: CHOI, Ji Hwan, PARK, Sung Jun, MIN, Jae Yun, CHUNG, Da Bin, JIN, Jae Kyu, KIM, Jeong A
• Format: Patent
• Language: English
• Published: 04.01.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A secondary battery comprising a positive electrode current collector, a first positive electrode mixture layer disposed on the positive electrode current collector and including a first positive electrode active material and a binder, and a second positive electrode mixture layer disposed on the first positive electrode mixture layer and including a second positive electrode active material and a binder. A nickel content of the second positive electrode active material is 80% by weight or less of a nickel content of the first positive electrode active material. By providing a secondary battery including a positive electrode of a multi-layer structure that includes positive electrode active materials having different contents of nickel, a secondary battery capable of improving high-temperature characteristics while maintaining energy density may be provided.