Research progress of prelithiation technology for positive electrode of Lithium-ion battery

Lithium-ion batteries (LIBs) deliver cardinal advantages including exceptional energy density and extended cycle durability, establishing their critical function in modern energy storage infrastructures. The formation of a solid electrolyte interface (SEI) on the cathode surface during the first cycle of lithium-ion batteries leads to severe irreversible lithium loss, lowering the initial coulombic efficiency (ICE). Cathode prelithiation technology has become a key strategy to compensate lithium loss and improve first effect due to its strong process compatibility. This paper provides a systematic review of cathode prelithiation technology, with emphasis on the prelithiation mechanism, lithium release kinetics, and performance distinctions of ternary, binary, and nanocomposite lithium additives. The effects, challenges and optimization strategies of various additives in improving initial capacity, coulomb efficiency and cycle stability are described. The feasibility and bottleneck of engineering application of prelithiation technology are further discussed, and the future research direction is prospected, which provides theoretical support and technical path for the development of high energy density and long life Lithium-ion batteries.