Lithium Battery Separator Material is widely used in our daily life products, including mobile phones, laptops, and other electronic products. With the development of new energy vehicles, the demand for lithium batteries will increase. Lithium batteries are gradually replacing traditional batteries in aerospace, navigation, artificial satellites, medical, military communications equipment, and other fields. Lithium battery separator film is the key component of the structure of lithium batteries. The film is made of plastic, which prevents direct contact between the anode and cathode to avoid the short circuit. And it also offers the ability to shut down at a temperature slightly lower than that at which thermal runaway occurs, while retaining its mechanical properties.