Abstract:
Compared with randomly oriented cathodes, nickel-rich cathodes assembled with radially oriented primary particle, which are ideal materials for fast charging and long-life lithium ion battery, have better fracture toughness and Li
+ diffusion rate. In recent years, Some researchers have reported a series of studies on morphology and accumulation regulation of primary particles for nickel-rich cathode. The performance of the cathodes developed by his group is excellent, representing the top level in the world, and the related technology has recently been transferred to the South Korean battery giant LG Chem. However, the synthesis of cathodes assembled with radially oriented primary particles is still in its infancy in China, and there is no systematic elaboration for the morphology and accumulation regulation of primary particles required to synthesize the nickel-rich cathode. In this paper, the necessity for the morphology and accumulation regulation of primary particles is first introduced. Then, the research progresses about the precipitation and high-temperature lithiation crystallization of precursor for the cathodes are summarized, and the mechanism involved in regulation of precipitation and high temperature calcination crystallization is analyzed. This pare is hoped to provide reference for relevant domestic specialist staff when developing high-end nickel-rich cathode materials.