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Standards Development
This document describes analytical procedures for determining the content of anions, such as chloride, sulfate, and fluoride ions, in lithium composite oxides. The determination is applicable to lithium composite oxides of LiBs. The determination is performed by ion chromatography.
Lithium-ion batteries (LIBs) with high energy and power density have been widely used in a variety of portable electronics, electric vehicles and industrial applications. One of the core constituent materials of lithium-ion battery cells is lithium composite oxide, which is a key factor affecting the performance of lithium-ion batteries, and accounts for as much as 30% to 40% of the cost in the overall system. Trace elements are one of the important indicators of lithium composite oxides, and their presence affects the structure and properties of lithium composite oxides in different degrees, which may be positive or negative. The common measurement detection method for trace elements is ICP, but it is mostly used to measure metallic elements. For the determination of anion content, ion chromatography (IC) can be used as a proven and established method. Sample pre-treatment procedures and test parameters can have a significant impact on the accuracy of testing for anion content in lithium complex oxides. Therefore, the development of a lithium complex oxide-specific method standard for testing anion content is necessary to provide guidance to other stakeholders.
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