LITHIUM SECONDARY BATTERY SEPARATOR HAVING ENHANCED ADHESIVE STRENGTH TO ELECTRODE AND IMPROVED RESISTANCE CHARACTERISTICS, AND LITHIUM SECONDARY BATTERY COMPRISING LITHIUM SECONDARY BATTERY SEPARATOR

The present invention is to provide a lithium secondary battery separator with excellent adhesive strength and air permeability, the lithium secondary battery separator comprising: a porous polymer substrate; and a porous coating layer containing inorganic particles and a binder, wherein when the bi...

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Bibliographic Details
Main Authors LEE, Joo-Sung, KIM, Bong-Tae, JUNG, Kil-An
Format Patent
LanguageEnglish
French
German
Published 06.07.2022
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:The present invention is to provide a lithium secondary battery separator with excellent adhesive strength and air permeability, the lithium secondary battery separator comprising: a porous polymer substrate; and a porous coating layer containing inorganic particles and a binder, wherein when the binder is prepared as a binder specimen with a thickness of 0.4 mm by pressurization at 190°C, the binder specimen comprises a first binder having a tan δ peak at 15-27.6°C and a second binder having a tan δ peak at 8-20.2°C, as measured by dynamic mechanical analysis (DMA).
Bibliography:Application Number: EP20200880692