METHOD FOR PREPARING A CATHODE OF A SECONDARY BATTERY AND A PURIFIED N-METHYL PYRROLIDONE, AND PURIFYING A WASTE N-METHYL PYRROLIDONE USING AN INHIBITOR

In a method for preparing a cathode of a secondary battery, a method for preparing a purified N-methyl pyrrolidinone (NMP), and a method for purifying a waste NMP, an inhibitor is added to prevent NMP from being decomposed to produce formaldehyde during the process. 1. The inhibitor may be a phenol-...

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Hauptverfasser:	CHOI, HWAN, CHOI, HWA YEONG, SHIM, SUNG WON, CHOI, TAE GI, SHIM, JAE WON, SON, BYUNG KI, SHIN, YOUN SOO, CHOO, YEONG SU
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY ELECTRICITY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SEPARATION TRANSPORTING
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Zusammenfassung:	In a method for preparing a cathode of a secondary battery, a method for preparing a purified N-methyl pyrrolidinone (NMP), and a method for purifying a waste NMP, an inhibitor is added to prevent NMP from being decomposed to produce formaldehyde during the process. 1. The inhibitor may be a phenol-based antioxidant and/or an amine-based light stabilizer.