리튬이차전지 양극 소재 성능 향상을 위한 최신 기술 동향 및 연구 전망

This study presents the development trends of cathode materials in lithium-ion batteries and the future research direction of cathode materials. Currently, lithium-ion batteries have been focused on improving the global environment, and research of lithium-ion batteries continues to concentrate on increasing the capacity and stability as lithium-ion battery application focus moves towards electric vehicles and energy storage systems. The study of cathode materials is considered important in determining the property and cost of lithium-ion batteries. Among such studies, researchers have concentrated on layered structure cathode materials with a high theoretical capacity. However, applying Ni-rich cathodes as a means to achieve high capacity has limited utilization because the high Ni composition in cathode materials causes increasing electrochemical instability during the charge process. In order to solve this problem, this study presents the ideas about the research method of surface modification and atomic substitution, suggesting a novel future research direction for cathode materials to ensure the price competitiveness of lithium-ion batteries.