| FAAS法测定锂离子电池正极材料LiMn_2O_4中杂质Ca、Mg |
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| 引用本文： | 汝坤林,张莉莉,沈勤.FAAS法测定锂离子电池正极材料LiMn_2O_4中杂质Ca、Mg[J].电源技术,2009,33(1). |
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| 作者姓名： | 汝坤林 张莉莉 沈勤 |
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| 作者单位： | 1. 苏州大学,化学电源研究所,江苏,苏州,215006
2. 江南大学,化学与材料工程学院,江苏,无锡,214122 |
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| 摘 要： | 采用火焰原子吸收分光光度法测定锂离子电池正极材料LiMnO4中杂质Ca和Mg的含量.考虑了盐酸浓度、基体对测定产生的影响,并验证了释放剂LaCI3在本实验测Ca、Mg中有显著的抗干扰能力.由实验结果可知:本方法准确度高、检出限低,Ca回收率在98.3%～102.8%之间,Mg在98.6%～99.2%之间,相对标准偏差(RSD)Ca＜6.65%,Mg＜1.68%,能够满足锂离子电池正极材料分析的要求.
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| 关 键 词： | 锂离子电池 正极材料 锰酸锂 火焰原子吸收光谱法 |
Determination of impurities Ca,Mg in cathode material of LiMn_2O_4 for Li-ion battery by FAAS |
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| RU Kun-lin,ZHANG Li-li,SHEN Qin.Determination of impurities Ca,Mg in cathode material of LiMn_2O_4 for Li-ion battery by FAAS[J].Chinese Journal of Power Sources,2009,33(1). |
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| Authors: | RU Kun-lin ZHANG Li-li SHEN Qin |
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| Affiliation: | 1.Institute of Chemical Power Sources;Soochow University;Suzhou Jiangsu 215006;China;2.School of chemical & Material Engineering;Jiangnan University;Wuxi Jiangsu 214122;China |
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| Abstract: | Impurities Ca and Mg in cathode material of LiMn2O4 for Li-ion battery were tested by flame atomic absorption spectrophotometry.The influences of acid concentration,basal body were researched and the remarkable anti-interference capability of the releasing agent LaCl3 was examined.The experiment results show that the method is accurate,the recovery of Ca is 98.3%-102.8%,Mg is 98.6%-99.2%;the RSD of Ca<6.65%,Mg<1.68%.The method can satisfy the need of analysis of cathode material for Li-ion battery. |
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