QUANTITATIVE ANALYSIS METHOD OF MAGNETIC FOREIGN MATERIAL CONTAINED IN CATHOD MATERIALS OF LITHIUM SECONDARY BATTERY

• Main Authors: HWANG, RA YOUNG, KIM, MI KYUNG, KIM, HYUN JU, JUNG, MIN HWAN
• Format: Patent
• Language: English; Korean
• Published: 11.02.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TESTING

The present invention relates to a method for quantitatively analyzing magnetic foreign matter contained in a cathode material of a lithium secondary battery. The method of the present invention, as a method for pretreating a cathode material of a lithium secondary battery, does not use a conventional direct acid decomposition method but uses a method for adsorbing magnetic foreign matter, which is contained in a cathode material, by using a magnet having a specially designed shape, thereby enabling quantitative analysis of magnetic foreign matter, which is present in trace amounts within the cathode material, without the interference of interfering components within the cathode material. 본 발명은 리튬 이차 전지의 양극재에 포함되어 있는 자성 이물질의 정량 분석방법에 관한 것이다. 본 발명의 방법은 리튬 이차 전지의 양극재의 전처리 방법으로서 종래의 직접 산 분해법을 사용하지 않고 양극재에 포함되어 있는 자성 이물질을 특수하게 설계된 모양의 자석을 이용하여 흡착시키는 방법을 사용함으로써 양극재 내 방해 성분의 간섭 없이 양극재 내 미량으로 존재하는 자성 이물질의 정량 분석이 가능하다.