ICP-OES法测定三元锂电池正极材料中镍、钴、锰元素含量的不确定度评估  

ICP-OES Method for Determining the Uncertainty of Nickel,Cobalt and Manganese Content in Ternary Lithium Battery Cathode Materials

作　　者：田二丽 张超 李军 孙硕 李宇升 温家德 Tian Erli;Zhang Chao;Li Jun;Sun Shuo;Li Yusheng;Wen Jiade(Global R&D Center,China FAW Corporation Limited,Changchun 130013)

机构地区：[1]中国第一汽车股份有限公司研发总院,长春130013

出　　处：《汽车工艺与材料》2025年第2期1-5,共5页Automobile Technology & Material

摘　　要：为提升电池材料质量和性能,解决电池安全问题,利用电感耦合等离子体光谱法(ICP-OES)对三元锂电池正极材料中的镍、钴、锰元素含量进行了精确测定,依据JJF 1059.1—2012《测量不确定度评定与表示》,对测量过程中的不确定度进行了系统性评估,并深入剖析了试验各环节可能引入的不确定度因素,针对各种不确定度进行了细致的量化和计算。当镍含量为5.521μg/mL时,其扩展不确定度U_(95)(Ni)=0.0131 mg/kg;当钴含量为3.566μg/mL时,其扩展不确定度U_(95)(Co)=0.0118 mg/kg;当锰含量为2.102μg/mL时,其扩展不确定度U_(95)(Mn)=0.0131 mg/kg。最终计算得出镍的合成不确定度u(Ni)=0.0066 mg/kg,钴的合成不确定度u(Co)=0.0059 mg/kg,锰的合成不确定度u(Mn)=0.0065 mg/kg。In order to improve quality and performance of battery material,and address the battery safety issue,the contents of nickel,cobalt and manganese elements in the cathode materials of ternary lithium batteries are accurately determined by Inductively Coupled Plasma-Optical Emission Spectroscopy(ICP-OES),and the uncertainty in the measurement process is systematically evaluated according to the standard of JJF 1059.1—2012“Evaluation and Representation of Measurement Uncertainty”.The uncertainty factors that may be introduced in each part of the test are deeply analyzed,and these uncertainties are carefully quantified and calculated.When the nickel content of the sample is 5.521μg/mL,the extended uncertainty is U_(95)(Ni)=0.0131 mg/kg.When the content of cobalt is 3.566μg/mL,the extended uncertainty is U_(95)(Co)=0.0118 mg/kg;when the manganese content is 2.102μg/mL,the extended uncertainty is U_(95)(Mn)=0.0131 mg/kg.Finally,the synthetic uncertainty of nickel is u(Ni)=0.0066 mg/kg,the extended uncertainty of cobalt is u(Co)=0.0059 mg/kg,and the extended uncertainty of manganese is u(Mn)=0.0065 mg/kg.

关 键 词：不确定度 三元锂电池 镍钴锰含量 电感耦合等离子体法 

分 类 号：U469.722[机械工程—车辆工程] TM912[交通运输工程—载运工具运用工程]