三元NCM锂离子电池高电压电解质的研究进展

被引：13

作者：

毛舒岚

武倩

王卓雅

陆盈盈

机构：

[1] 浙江大学化学工程与生物工程学院

来源：

储能科学与技术 | 2020年 / 9卷 / 02期

关键词：

锂离子电池; 镍-钴-锰三元正极材料; 高电压电解质; 正极-电解质界面;

D O I：

10.19799/j.cnki.2095-4239.2019.0287

中图分类号：

TM912 [蓄电池]; O614.111 [锂Li];

学科分类号：

070301 [无机化学]; 080802 [电力系统及其自动化];

摘要：

层状三元材料LiNixCoyMn1-x-yO2（以下简称NCM）具有较高的比容量和工作电压平台及良好的倍率性能,在电动汽车领域占据重要地位。为满足电动汽车续航里程的需求,提高工作电压被视为提升三元锂离子电池能量密度的一种有效手段。然而现存电解液电化学窗口窄,无法实现高电压下的稳定循环。本综述对高工作电压下的NCM电池电解质进行探讨,从电解液在高工作电压下分解相关的前线轨道理论及电极与电解液界面反应出发,指出了提高三元正极材料锂离子电池高压工作性能的关键,总结了近年来高工作电压下三元正极材料锂离子电池非水系电解质在溶剂、锂盐、添加剂等方面的设计进展以及固态电解质和离子液体在高工作电压下NCM电池中的应用。最后对电解液在高工作电压下的实际应用提出改进方案,对未来固态电解质的发展趋势提出展望。

引用

页码：538 / 550

页数：13

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