Poly(ether ether ketone)-Induced Surface Modification of Polyethylene Separators for Li-Ion Batteries

With the global effort to reduce fossil fuels and use eco-friendly energy, interest in Li-ion batteries (LIBs) is rapidly increasing. In LIB system, separator an important component for determining rate performance safety of cells. Although polyolefin separators are commercially used LIBs, they still suffer from inferior electrolyte wettability low thermal stability issues. Here, we introduce a chemical surface modification polyethylene (PE) using poly(ether ether ketone) (PEEK) coating. The were pretreated tannic acid solution enforce adhesion coated layers. Then, PEEK was onto PE by doctor blading method. examined infrared spectroscopy, properties characterized uptake contact angle measurements. treated hydrophilic, ionic conductivity cell with modified significantly improved. As result, corresponding strategy proposed here can be applied polyolefin-based as well.