Modification Strategies of High‐Nickel Layered Oxides Cathode for Lithium‐ion Batteries

The rapid expansion of modern industry has resulted in an over‐reliance on fossil fuels, leading to global energy crises and environmental issues. To address these challenges, China has established "dual‐carbon" goals, aiming to achieve carbon peaking by 2030 and carbon neutrality by 2060. Meeting these targets necessitates a transition from traditional fossil fuels to renewable energy sources and the development of low‐cost, high‐performance energy storage systems. Lithium‐ion batteries, characterized by their low cost, high energy density, long life, and safety, have emerged as a key technology. High‐nickel layered cathode materials, such as LiNiO2 and LiNi1‐x‐yCoxMnyO2 (NCM), offer higher specific capacities and lower costs compared to traditional materials like LiCoO2. However, they face significant challenges including cation mixing, oxygen evolution, transition metal ion dissolution, and structural instability during cycling. This review discusses various modification strategies, including innovative synthesis methods, element doping, surface coating, single‐crystal design, and concentration gradient structures, to enhance the stability and performance of high‐nickel cathodes. The study concludes that while high‐nickel cathodes show promise, further research is needed to balance energy density, safety, and cost‐effectiveness for large‐scale commercial applications.