有色设备

Ni-rich ternary cathode material (Ni≥60%) has become one of the most promising battery materials due to its high energy density, low toxicity, low pollution and low price. At present, most of the commercial Ni-rich ternary cathode materials are agglomerated polycrystalline materials. Polycrystalline materials will produce microcracks due to the volume expansion, which result in more side effects between cathode materials and electrolyte, then, cause structural collapse. The research shows that microcracks are the main reason for the capacity decline of Ni-rich ternary cathode materials (Ni≥60%). Single-crystal cathode materials can solve the problem due to the absence of internal grain boundaries. In addition, because of the high compaction density and good thermal stability, the single crystal Ni-rich ternary cathode material has attracted the attention of experts and scholars at home and abroad. In this paper, based on the current situation of single-crystal Ni-rich cathode materials industry, the different preparation methods are summarized, which provides reference for the cutting-edge layout of enterprises.