New modified non-woven lithium ion battery separator and method of manufacturing the same

摘要

The present invention relates to a separator for a new modified nonwoven fabric lithium ion battery. The separator includes a modified nonwoven fabric substrate and a composite filler thereof. The modified nonwoven fabric substrate includes a low melting point material and a high melting point material. The low melting point material is melt crystallized. The weight of the high melting point material is 85 to 99.9% of the total weight of the base material, and the rest is the low melting point material. The filler combined with the modified nonwoven fabric substrate comprises an organic polymer and a first filler material and / or a second filler material. The present invention further relates to a method for manufacturing the battery separator. The method includes producing a nonwoven fiber layer, producing a modified nonwoven substrate, producing a filler pulp, filling, removing the solvent, and post-processing. In order. The method is simple to operate, low in cost, and manufactured products have low moisture content, good chemical stability, and high mechanical strength, thus improving battery yield, service life and safety.