Method for evaluating secondary battery active material

Provided is a method for evaluating a secondary battery active material, comprising: preparing an active material including a core and a shell located on the surface of the core; forming an active material layer including the active material on at least one surface of a current collector; acquiring...

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Bibliographische Detailangaben
Hauptverfasser:	Yun, Jung-Hyun, Kim, Hyo-Sang, Lee, Suk-Chin
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS COLORIMETRY ELECTRICITY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY RADIATION PYROMETRY TESTING
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Beschreibung
Zusammenfassung:	Provided is a method for evaluating a secondary battery active material, comprising: preparing an active material including a core and a shell located on the surface of the core; forming an active material layer including the active material on at least one surface of a current collector; acquiring a Raman spectrum for the active material and calculating a Raman R value (ID/IG) therefrom; obtaining a frequency distribution chart for the Raman R value; obtaining a probability density function by normalizing the frequency distribution chart; and evaluating the shell of the active material by extracting a Raman R value (ID/IG) and/or a predetermined width indicating a maximum value from the graph of the probability density function.