LAUSR

In this article, the unusual delamination phenomenon of LIB separators prepared by a wet process is reported. Meanwhile, a simple tearing test is proposed to quantify the delamination trend from the energy point of view and the effects of the tearing rate and temperature on the delamination trend of the separator were researched. Increasing the temperature makes separator delamination much more difficult, while the tearing rate has weaker effects on the separator delamination trend at lower temperatures but has a stronger influence at higher temperatures. In addition, the delamination trend of the separator in various electrolytes and under repeated compression cycles, which happened to the separator during battery cycles, is also investigated in detail. Also, the results show that the energy consumption per unit area during delamination decreases distinctly with increasing number of compression cycles, which was also influenced severely by different kinds of electrolytes with different Hildebrand interaction parameter.