Polyphenylene Oxide-based Nanofiber Separator Prepared by Electrospinning Method for Lithium-ion Batteries
LI Ke-feng1,2, YIN Xiao-yan2
1. Shandong Zibo Experimental High School, Zibo 255000, Shandong, China;
2. College of Chemical Engineering, Shandong University of Technology, Zibo 255000, Shandong, China
Abstract:To improve the high temperature safety and charge-discharge performance of lithium-ion batteries, a novel polyphenylene oxide-based nanofiber separator was facilely prepared by electrospinning method and investigated in lithium-ion batteries. Some investigations including morphology, microstructure, electrolyte wettability, thermal resistance and cell performance were carried out. The results demonstrate that the polyphenylene oxide-based separator with fiber diameter of 260 nm exhibits uniform porous structure (with average pore size of 500nm). The porosity is up to 74%, which is about one time higher than that of polyolefin separators. This separator also shows excellent electrolyte uptake (310%) and thermal stability at 150℃ for 60min.Cell performance tests show that the nanofiber separator exhibits better discharge performance and cycle performance compared with the commercial PE separator.
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