SEPARATOR HAVING EXCELLENT BONDING PERFORMANCE AND AIR PERMEABILITY AND PREPARATION METHOD THEREFOR

The present invention relates to the technical field of lithium batteries, and in particular to a separator having excellent bonding performance and air permeability and a preparation method therefor. The separator comprises a base film and a bonding layer; the bonding layer is provided on at least...

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Bibliographische Detailangaben
Hauptverfasser:	XU, Qiang, WANG, Xiaoming, SUN, Dongyue, ZHANG, Lei, WEI, Xingqiang
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	The present invention relates to the technical field of lithium batteries, and in particular to a separator having excellent bonding performance and air permeability and a preparation method therefor. The separator comprises a base film and a bonding layer; the bonding layer is provided on at least one surface of the base film; the bonding layer comprises a plurality of hollowed-out structures; each hollowed-out structure is fixed to the surface of the base film; each hollowed-out structure is formed by enclosing a protruding part, and the inner portion enclosed by the protruding part is a hollowed-out part. The separator having excellent bonding performance and air permeability and the preparation method therefor of the present invention keep the thermal shrinkage performance of a ceramic-coated separator, satisfy the bonding strength between a separator and an electrode sheet by means of a low adhesive content, further keep good air permeability of a separator, and improve the comprehensive performance of a battery.