Review—Advancements in Synthesis Methods for Nickel-Rich NCA Cathode Materials: Optimizing Synthesis Conditions and Their Impact on Electrochemical Performances for Next-Generation Lithium Batteries

Nickel-rich Li ( N i 0.8 C o 0.15 A l 0.05 O 2 ) cathode materials have emerged as highly promising for lithium-ion batteries. They have gained traction in the commercial market due to safety and cost concerns surrounding cobalt-based cathodes. The layered oxide NCA cathode is more cost-effective and environmentally friendly compared to LiCoO2. However, it is crucial to carefully control the properties of NCA electrode materials, such as microstructure, morphology, and particle size, during the synthesis process to meet the increasing global demand for energy and the power requirements of electric vehicles. One of the main challenges with NCA cathodes lies in the demanding synthesis conditions. The properties of nickel-rich NCA cathodes, which significantly impact battery performance, depend on the synthesis process. Scientists are striving to identify optimal synthesis conditions to produce high-quality NCA cathodes suitable for various battery industries and commercial-scale applications. This review paper aims to present the latest advancements in synthesis methods for nickel-rich NCA cathode materials and explore the effects of different experimental conditions on their morphology, structure, and electrochemical properties. It provides guidance on selecting the best synthesis parameters for nickel-rich NCA cathode materials, serving as a valuable resource for research on NCA-layer oxide materials for all-solid-state lithium batteries.