电感耦合等离子体原子发射光谱法测定锂离子电池三元正极材料LiNi_(1-x-y)Co_xMn_yO_2中钠  

Determination of sodium in ternary cathode material(LiNi_(1-x-y)Co_xMn_yO_2)for lithium ion battery by inductively coupled plasma atomic emission spectrometry

作　　者：欧阳曦 陈珍华 郑雪琴 

机构地区：[1]江西江特锂电池材料有限公司,江西宜春336000

出　　处：《冶金分析》2014年第11期42-45,共4页Metallurgical Analysis

摘　　要：在锂离子三元正极材料LiNi1-x-y CoxMnyO2中,钠离子会占据锂离子的位置,钠离子的存在会降低材料的克容量,因此需要严格控制材料中钠含量.在研究采用电感耦合等离子体原子发射光谱法（ICP-AES）测定锂离子三元正极材料LiNi1-xyCoxMnyO2中的杂质元素钠含量的条件包括样品的溶解方法、测定介质盐酸的浓度、称样量、仪器参数基础上、建立了锂离子三元正极材料LiNi1-x-yCoxMnyO2中钠的测定方法.方法无需进行基体匹配、添加消电离剂等烦琐操作步骤就能得到准确、稳定的测量结果.方法的回收率在97.8％～103.6％之间,样品分析结果相对标准偏差小于2.5％,完全能够满足三元正极材料分析的要求.The sodium ions in ternary cathode material （LiNi1-x-yCoxMnyO2） for lithium ion battery would replace lithium ions, thus reducing the electricity capacity of materials. Therefore, the content of sodium in cathode material must be strictly controlled. In this study, the content of impurity sodium in ternary cathode material （LiNi1-x-yCoxMnyO2） for lithium ion battery was determined by inductively coupled plasma atomic emission spectrometry （ICP-AES）. The effect of sample dissolution method, the concentration of hydrochloric acid in testing medium, the sample mass and the instrumental parameters was investigated. The analysis method of sodium in LiNi1-x-yCoxMnyO2 was established. The complicated operation procedures such as matrix matching or the addition of ionization buffer were not required in this method. The determination results were accurate and stable. The recoveries were between 97.8% and 103.6%, and the relative standard deviation （RSD） was less than 2.5 %, which could meet the analysis requirements of ternary cathode materials.

关 键 词：三元正极材料 电感耦合等离子体原子发射光谱法(ICP—AES) 钠 锂离子电池 

分 类 号：O657.31[理学—分析化学]