With the development of information technology

lithium ion battery becomes well known due to its increasingly wide application. And the separator

as an important part of the lithium ion battery

therefore has attracted more and more attention. Because of the excellent mechanical properties

chemical stability and low cost

polyolefin separator has already become the choice of the most situation. The mini-review presented here summaries many aspects of polyolefin separator

including the preparation process (mainly covering the dry and the wet methods)

different commercial products

commodity parameters

and as well as the post-modification methods for separator. Furthermore

the improved ways for the porosity

electrolyte wettability and thermal stability of polyolefin separator are also highlighted. The authors hope this mini-review will contribute to the understanding of the development progress of polyolefin separator.