ICP-OES法测定三元正极材料中19种微量元素含量  

Determination of 19 Trace Elements in Ternary Cathode Materials by ICP-OES

作　　者：李宇升 韩小龙 李军 孙硕 姜晓娜 孙凯 Li Yusheng;Han Xiaolong;Li Jun;Sun Shuo;Jiang Xiaona;Sun Kai(Global R&D Center,China FAW Corporation Limited,Changchun 130013)

机构地区：[1]中国第一汽车股份有限公司研发总院,长春130013

出　　处：《汽车工艺与材料》2025年第2期6-10,共5页Automobile Technology & Material

摘　　要：锂离子电池三元正极材料中的微量元素直接影响电池性能,为准确测定其元素含量,利用电感耦合等离子体发射光谱(ICP-OES)法,建立了同时测定锂离子电池三元正极材料中铌、硼、锆、锶、钽、钛、铱、镧、钙、铜、铁、钾、镁、磷、钠、铝、铬、钼、锌共19种微量元素的分析方法。考察了不同溶剂对三元正极材料中微量元素含量测定的影响,最终确定最佳样品溶剂。结果表明:该方法简便、快捷,有良好的分析重复性和可靠性,各元素的相对标准偏差为0.58%~3.56%,回收率为91.81%~104.91%,满足三元正极材料微量元素含量分析的需要。In the lithium-ion battery ternary anode materials,trace elements affect the battery performance directly,in this study,an analytical method for simultaneous determination of 19 trace elements including Nb,B,Zr,Sr,Ta,Ti,Y,La,Ga,Cu,Fe,K,Mg,P,Na,Al,Cr,Mo and Zn in ternary anode materials of lithium ion batteries is established by inductively coupled plasma emission spectrometry.The influence of different solvents on the determination of trace elements in ternary anode materials is investigated,and the best sample solvent is determined.The results show that the method is simple,rapid,and has good repeatability and reliability.The relative standard deviation of each element is 0.58%~3.56%,and the recovery is 91.81%~104.91%,which can fully meet the needs of trace element content analysis of ternary cathode materials.

关 键 词：电感耦合等离子体原子发射光谱法 锂电池 三元正极 微量元素 

分 类 号：U469.722[机械工程—车辆工程]