Al_2O_3/PTFE杂化涂层改性聚乙烯隔膜  

Al_2O_3/PTFE layer coated polyethylene separator

作　　者：杨书廷 谷继峰[1,2,3] 尹艳红 毛新欣[1,2,3] 马文豪[2,3] YANG Shu-ting1,2,3,GU Ji-feng1,2,3,YIN Yan-hong2,3,MAO Xin-xin1,2,3,MA Wen-hao2,3(1.College of Physics and Materials Science, Henan Normal University,Xinxiang Henan 453007,China;2.School of Chemistry and Chemical Engineering, Henan Normal University,Xinxiang Henan 453007,China;3.National ＆ Local Joint Engineering Laboratory for Motive Power and Key Materials,Xinxiang Henan 453007,Chin)

机构地区：[1]河南师范大学物理与材料科学学院,河南新乡453007 [2]河南师范大学化学化工学院,河南新乡453007 [3]动力电源及关键材料国家地方联合工程实验室,河南新乡453007

出　　处：《电源技术》2018年第8期1107-1109,1196,共4页Chinese Journal of Power Sources

基　　金：国家高技术研究发展计划(2013AA110104)

摘　　要：以聚乙烯(PE)湿法膜为基体,在其两侧涂覆厚度为2μm的氧化铝(Al_2O_3)和聚四氟乙烯(PTFE)共混颗粒,得到一种杂化涂层PE电池隔膜。对复合隔膜的形貌、润湿性和热稳定性等进行了研究。结果表明:Al_2O_3/PTFE涂层均匀涂布于PE膜表面,在140℃下复合PE膜没有出现较大的收缩,并且混合颗粒有效地改善了PE膜的润湿性,提高了膜的吸液率。以Al_2O_3/PTFE复合PE膜作为隔膜组装电池并进行分析表明,杂化层可以显著提高电池长期充放电循环的容量保持率。Coating separators were prepared by coating both sides of porous polyethylene（PE） membranes with aluminum oxide（Al2O3） and Teflon（PTFE）. The morphology, wettability and thermal stability of composite diaphragm were studied. The morphology study shows that Al2O3/PTFE coating layers are formed on the PE separators. Larger shrinkage of PE film is not appeared under 140 ℃; the wettability of PE film and the liquid absorption rate of membrane are effectively improved by hybrid particles. The Al2O3/PTFE coated PE separator was used as the membrane to assemble the battery. The analysis shows that the capacity retention of the cycling performance of cells are obviously improved by the hybrid layer.

关 键 词：Al2O3/PTFE涂层 涂覆 锂电池隔膜 

分 类 号：TM912[电气工程—电力电子与电力传动]