超级微波消解-电感耦合等离子体发射光谱(ICP-OES)法测定锂离子电池隔膜中8种痕量金属元素  

Determination of 8 Trace Metal Elements in the Membrane of Lithium-ion Batteries by Inductively Coupled Plasma Optical Emission Spectrometry with Super Microwave Digestion

作　　者：刘小雨 李鹰 李剑 张学玮 LIU Xiaoyu;LI Ying;LI Jian;ZHANG Xuewei(Hangzhou Puyu Technology Co.,Ltd.,Hangzhou,Zhejiang 311300,China)

机构地区：[1]杭州谱育科技发展有限公司,杭州311300

出　　处：《中国无机分析化学》2023年第9期1016-1022,共7页Chinese Journal of Inorganic Analytical Chemistry

基　　金：国家重点研发计划项目(2021YFF0700804)。

摘　　要：锂离子电池隔膜直接影响锂离子电池的安全性能和整体性能,是锂离子电池十分重要的组成部分,通过考察最佳消解前预加热处理温度及时间、超级微波消解体系、超级微波消解时间及温度、分析谱线,建立了超级微波消解-电感耦合等离子体发射光谱(ICP-OES)法测定锂离子电池隔膜中铁、铜、锌、铬、铝、钠、钙、镁元素的方法。结果表明,4 mL硝酸-1 mL高氯酸-3 mL磷酸消解体系在电热板上120℃预加热1 h后,再在260℃的超级微波中消解40 min的消解效果最好,ICP-OES测定结果表明各元素在质量浓度为0~5 mg/kg范围内标准曲线的线性关系良好,相关系数为0.99993~0.99999,测试结果精密度为0.30%~2.8%,加标实验回收率为91.4%~99.9%。方法准确且简便,能实现对锂离子电池隔膜中痕量金属元素含量的高通量及快速测定,为评价锂离子电池隔膜中痕量金属元素含量提供科学的数据参考。The lithium-ion battery membrane directly affects the safety and overall performance of the lithium-ion battery,and it is a very important part of the lithium-ion battery.This test determined the best pre-heating treatment time and temperature before digestion,super microwave digestion system,time and temperature of super microwave digestion.Therefore,a method for the determination of Fe,Cu,Zn,Cr,Al,Na,Ca and Mg in the lithium-ion battery membrane by super microwave digestion-inductively coupled plasma optical emission spectrometry(ICP-OES)was established based on the analysis of spectral lines in this paper.The results showed that the best digestion effect was obtained under the following conditions:nitric acid(4 mL)-perchloric acid(1 mL)-phosphoric acid(3 mL)digestion system was preheated at 120℃on a hot plate for 1 h,and then digested in a 260℃super microwave for 40 min.The results of ICP-OES showed that the linear relationship of the standard curves for each element was good in the mass concentration range of 0—5 mg/kg,the corresponding correlation coefficient was ranging from 0.99993 to 0.99999.In addition,the precision of the test results was between 0.30%and 2.8%,and the recoveries of the spiked experiment was between 91.4%and 99.9%.The method is accurate and simple,and can achieve high-throughput,rapid determination of trace metal element content in lithium-ion battery membrane,thus providing scientific data reference for evaluation of trace metal element content in lithium-ion battery membrane.

关 键 词：电感耦合等离子体发射光谱 锂离子电池隔膜 痕量金属元素 

分 类 号：O657.31[理学—分析化学]