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One way to obtain the lithium ion power battery with better safety performance was to increase the thermal shrinkage resistance of the separator at higher temperature. Phenolphthalein polyetherketone (PEK-C) is a polymer that can withstand high temperature to about 230°C. Here, we developed a new Al 2 O 3 coated composite polypropylene (PP) separator with PEK-C as binder. The coating...
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