Cellulion® is the first high performance, lithium-ion battery separator made from 100% cellulose. Compared to polyolefin separator, NKK's separator exhibits heat resistance, superior porosity, and high liquid retention rate.

NKK Cellulion® separator papers are 100% cellulose in composition, produced from plant-based LENZING™ branded Lyocell fibers, supplied by Austrian-based Lenzing AG.