The invention relates to the field of lithium batteries, in particular to a polyolefin-free separator, its preparation method and lithium batteries containing the separator. The separator is made of solid electrolyte ceramic particles and electrolyte-soluble polymer binder with a weight ratio of (80‑90):(10‑20). The particle size D50 of ceramic particles ranges from 50 nm to 1 μm. Without polyolefin substrate, the separator features non-plastic deformation, excellent thermodynamic stability and shear resistance, and effectively prevents large-area short circuit caused by battery shearing or needle piercing. It can be manufactured by extrusion sheeting, coating drying or direct melt extrusion, with simple working procedures and easy large-scale industrial production.
Area Code: CN
Application Number: CN202010318067.5
