摘要
对一例申报为"镍钴物料"的进口货物进行多技术联用表征,通过分析确认其来源属性,并对其是否可用作原料的可行性进行了探讨,结果为进口监管提供了技术支撑.采用X射线荧光光谱分析、碳硫分析、顶空气相色谱质谱分析、裂解气相色谱质谱分析、X射线衍射分析、电镜能谱分析、电位滴定分析、原子吸收光谱分析、热重分析、感观检测等多种技术手段进行测试,并与相关文献资料对比进行溯源分析,对样品进行微观形貌、元素组成、物相组成、毒害物质、有机物等特征的分析.结果表明:样品主要为镍钴锰酸锂三元材料,还含有少量金属铝屑、单质碳以及有机物,具有锂离子电池正极片的组成特征,结合样品的外观和组成特征,确认样品是锂离子电池正极片的回收粉料.
Abstract
A case of imported goods declared as"nickel-cobalt material"was characterized by multi-technol-ogy combination,and its source attribute was confirmed through analysis,and the feasibility of whether it could be used as raw material was discussed.The results provided technical support for import supervi-sion.X-ray fluorescence spectrometry,carbon-sulfur analysis,headspace gas chromatography mass spec-trometry,pyrolysis gas chromatography mass spectrometry,X-ray diffraction analysis,electro microscope energy spectrum,potentiometric titration,atomic absorption spectrometry and thermogravimetric analysis combined with sensory detection were employed for the testing.It was compared with the relevant litera-tures for traceability analysis.The micro-morphology,elemental composition,physical phase composition,toxic substances,organic compounds and other characteristics of the sample were analyzed.The results showed that the sample was mainly a ternary material of nickel-cobalt-lithium manganate,and also con-tained a small amount of metal aluminum chips,elemental carbon and organic compounds,which had the composition characteristics of lithium-ion battery cathode wafers.Combined with the appearance and com-position characteristics of the sample,it was confirmed that the sample was the recycled powder of lithium-ion battery cathode wafers.
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