Lithium ion battery ceramic separating membrane and preparation method thereof

The invention discloses a lithium ion battery ceramic separating membrane, which comprises a separating membrane substrate. At least one surface of the separating membrane substrate is coated with ceramic slurry, which comprises a binder that is an epoxy resin. The invention further discloses a preparation method of the lithium ion battery ceramic separating membrane. The surface of the lithium ion battery substrate separating membrane is coated with a ceramic layer with the thickness being 1-4 mum, and through ultraviolet irradiation, epoxy resin which is a binder is cross-linked and cured. The heat-resistant temperature of a ceramic layer and the bonding strength of the ceramic layer and the substrate membrane are improved, thermal contraction of the separating membrane is reduced, and heat resistance of the separating membrane is improved, so that the safety performance of the lithium ion battery is improved. 本发明公开了种锂离子电池陶瓷隔膜，包括隔膜基体，所述隔膜基体至少个表面涂覆有陶瓷浆料，所述陶瓷浆料包括粘结剂，所述粘结剂为环氧树脂。本发明还公开了上述锂离子电池陶瓷隔膜的制备方法。本发明在锂离子电