高镍无钴正极材料研究进展

The research progress of high nickel cobalt-free cathode materials

高镍无钴正极材料具有低毒性、低成本、高比能的特点,是目前锂离子电池正极材料的研究热点之一。介绍了高镍无钴正极材料制备方法及其改性研究进展,指出通过优化制备工艺可以提高正极材料的结构稳定性;利用体相掺杂和表面包覆改性可以改善材料的电化学性能。未来应注重高镍无钴正极材料失效机理和复合改性机理的研究,解决其结构不稳定和倍率性能差等问题。

High nickel cobalt-free cathode material has the characteristics of low toxicity,low cost and high specific energy,and is one of the research hotspots of cathode materials for lithium-ion batteries.In this paper,the latest research progress in the preparation and modification of high nickel cobalt-free cathode materials was reviewed,pointing out that optimizing the preparation process could improve the structural stability of cathode electrode materials.The use of bulk phase doping and surface modification could enhance the electrochemical performance of materials.In the future,attention should be paid to the research on the mechanism of failure and composite modification of high nickel cobalt-free cathode materials to solve the problems of structural instability and poor rate performance.