锂离子电池高镍三元正极材料改性研究进展

Research progress on modification ofhigh nickel ternary cathode materials for lithium ion batteries

高镍三元正极材料具有能量密度大,电压平台高,无记忆效应等优势,受到研究者们的广泛关注。但受限于其循环稳定性差,阳离子混排,热稳定性差等缺陷,高镍三元正极仍需进行广泛深入的研究。围绕高镍三元正极材料的不足,概括了近年来离子掺杂、表面包覆、共改性、浓度梯度、电解质改性和结构调控等改性策略的最新进展,并对未来的研究方向进行了探讨与展望。

High-nickel ternary cathode materials have received extensive attention from researchers due to their advantages,including high energy density,high voltage plateau,and non-memory effect.However,limited by its deficiencies such as poor cycling stability,cations disordering,and poor thermal stability,there remains necessity for extensive and comprehensive research on high-nickel ternary cathodes.This paper focuses on the deficiencies of high nickel ternary cathode materials,and summarized recent advances in modification approaches,encompassing ions doping,surface coating,concentration gradient,co-modification,electrolyte modification and structure regulation in recent years,while also discussing and providing prospects for future research directions.