FAAS测定锂离子电池正极材料LiMn_2O_4中的杂质钠

Determination of Impurity of Na in Cathode Materials of Li-Ion Battery by FAAS

采用火焰原子吸收光谱法测定锂离子电池正极材料LiMn2O4中杂质Na的含量。综合考虑了消电离剂氯化铯、盐酸浓度、基体对测Na产生的影响,通过控制酸的浓度和在标准溶液中加入定量基体和消电离剂氯化铯来消除测定误差。由实验结果可知本方法简便易行,灵敏度和准确度高,精密度好,回收率在96.2%—103.8%之间,相对标准偏差(RSD)小于2%(n=10),能够满足锂离子电池正极材料分析的要求。

The impurity of Na in cathode materials of Li-ion battery was determined by flame atomic absorption spectrometry.The influences of ionization buffer（cesium chloride）、acid concentration and basal body were studied and eliminated by controlling acid concentration and adding basal body and ionization buffer（cesium chloride）in standard solutions.The recovery is between 96.2% —103.8%,the RSD is below 2%（n=10）.The method is sensitive and accurate and can satisfy the need of analysis of cathode materials of Li-ion battery.