Effect of polymer blending and drawing conditions on properties of polyethylene separator prepared for Li-ion secondary battery
Effect of polymer blending and drawing conditions on properties of polyethylene separator prepared for Li-ion secondary battery
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DOI：
10.1016/s0378-7753(02)00097-6
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发表时间：
2002-07-01
影响因子：
9.2
通讯作者：
Kim, J
中科院分区：
文献类型：
--
作者：
Ihm, D;Noh, J;Kim, J
采用湿法工艺制备了高密度聚乙烯（HDPE）和超高分子量聚乙烯（UHMWPE）共混聚合物隔膜。研究了聚合物共混及拉伸条件对隔膜力学性能的影响。机械强度随着UHMWPE聚合物的分子量和含量的增加而增加。含有6重量%的膜。拉伸比为5时，超高分子量聚乙烯的拉伸强度约为1000 kg cm（-2）。隔膜的孔非常均匀，尺寸为0.1-0.12 μ m。关断（SD）特性在130 ℃附近迅速增加，熔化温度为160 ℃。这些特征表明隔膜适用于Li离子二次电池。(C)2002 Elsevier Science B. V.保留所有权利。
A separator made of the polymer blends of high density polyethylene (HDPE) and ultra-high molecular weight polyethylene (UHMWPE) is prepared by a wet process for the Li-ion secondary battery. An investigation is made of the effect on the mechanical properties of the separator by the blending of the polymers and the drawing conditions. The mechanical strength is increased with increasing molecular weight and content of UHMWPE polymer. A film containing 6 wt.% UHMWPE has a tensile strength of about 1000 kg cm(-2) at a draw ratio of 5. The pores of the separator are very uniform with a size of 0.1-0.12 mum. The shut-down (SD) characteristics increase rapidly in the vicinity of 130 C and the fusion temperature is 160 degreesC. These features suggest that the separator is applicable to the Li-ion secondary battery. (C) 2002 Elsevier Science B.V. All rights reserved.