锂离子电池正极材料共混改性研究进展

Research progress in blending modification cathode materials for lithium ion batteries

本文简述了国内外锂离子电池正极材料共混改性的研究进展。正极材料是锂离子电池重要组成部分,是决定锂离子电池能量密度和成本的关键因素。共混改性具有制备工艺简单、材料性能一致性容易控制、综合成本较低等优点,在钴酸锂、锰酸锂、磷酸铁锂和三元材料电池制造中得到应用。国内外通过对正极材料共混改性机理研究,发现共混改性是材料改善电化学性能、降低成本、提升安全性能的有效途径,并有望发展成为依据材料特性指导锂离子电池高性能电极设计的重要方法。同时在正极材料共混改性方面亟需加强共混材料物性匹配、充放电机制选取、共混工艺研究,该方法也为高镍、富锂锰基等新一代正极材料工业化应用提供了工艺参考。

It introduces the research progress in blending modification cathode materials for lithium ion batteries.The cathode material is the most important part of lithium battery.It is becoming the bottleneck to the increase of energy density and the decrease of cost of lithium ion batteries.The blending modification cathode materials has been proven to be a promising approach to improve the electrochemical performance in battery production process.Blending modification cathode materials has the advantages of low-cost and simple preparation process.It has been expected to be a promising approach to design advanced electrodes based on material characteristics for future lithium-ion batteries.The article also points out that the research of properties matching,charging and discharging mechanisms and blend process were urgently needed.