X射线能谱法测定镍钴锰酸锂中镍、钴、锰三元素摩尔比  

Determination for the Molar Ratio of Nickel,Cobalt,Manganese of Nickel-cobalt-manganese Lithium by X-ray Energy Spectrum

作　　者：付雪涛[1] 赵俊莎 高亚欣 张军华 FU Xuetao;ZHAO Junsha;GAO Yaxin;ZHANG Junhua(China Electronics Standardization Institute,Beijing 100176,China)

机构地区：[1]中国电子技术标准化研究院

出　　处：《中国无机分析化学》2020年第1期76-80,共5页Chinese Journal of Inorganic Analytical Chemistry

基　　金：中国电子工业标准化技术协会2019年标准科研项目(CESA-2019-1-027)

摘　　要：采用扫描电子显微镜-X射线能谱(SEM-EDS)及电感耦合等离子体发射光谱(ICP-OES)法对锂离子电池用镍钴锰酸锂中镍、钴、锰三元素间的摩尔比进行了测定。结果显示,在SEM-EDS测定过程中,如果将样品压成片状,选择合理的测定电压,同时对镍、钴谱线的重叠峰进行分峰拟合,以独立正态分布峰的面积换算各元素的摩尔百分比,SEM-EDS的测定结果与ICP-OES的测定结果具有较高的一致性,二者相对偏差不大于5%。镍、钴、锰三元素摩尔比的SEM-EDS测量值的相对标准偏差(n=3)不大于1%。In this paper,scanning electron microscope-energy spectrum(SEM-EDS)and inductively coupled plasma optical emission spectrometry(ICP-OES)were used to determinate the molar ratio of Ni,Co and Mn of nickel-cobalt-manganese lithium used in lithium ion battery.The results indicate that during a SEM-EDS measurement,when the sample is pressed into piece and an appropriate working voltage is selected,meanwhile the Ni-Co overlap peak is separated and use the areas of normally distributed peaks to calculate the mole ratios of the elements,then the SEM-EDS measuring results will be in good agreement with those of ICP-OES,the relative deviation between the two methods is less than 5%.The relative standard deviation(n=3)of the SEM-EDS measurements for the Ni,Co,and Mn is less than 1%.

关 键 词：X射线能谱 镍钴锰酸锂 摩尔比 测定 

分 类 号：O657.62[理学—分析化学] TH842[理学—化学]