Our History

Proven Performance

With more than 30 years of experience in the development, manufacturing, and distribution of high-performance membrane separators, Celgard is a recognized leader among lithium battery material suppliers, delivering outstanding product performance, reliable supply, technical solutions, and global business support.

Celgard® products were initially developed in the mid-1960s at the Celanese Research Labs in Summit, New Jersey, USA.  By the mid-1970s, our membranes enjoyed commercial success as a key component in blood oxygenation devices commonly used in heart bypass surgery. 

Celgard has been developing and producing separators for primary (single-use) lithium batteries since the early 1980s, and for secondary (rechargeable) lithium batteries since the early 1990s.

Timeline of Significant Celgard® Membrane Separator Events: