Journal
ADVANCED ENERGY MATERIALS
Volume 3, Issue 3, Pages 314-320Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201200292
Keywords
lithium-ion battery safety; abuse tolerance; separators; thermal stability
Categories
Funding
- Sandia's Laboratory Directed Research and Development Program
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
Ask authors/readers for more resources
This report describes the preparation and performance of electro-spun polyester-based separators for lithium-ion batteries. Polyester fibers (200500 nm) are electro-spun into nonwoven mats and pressed into separator sheets approximate to 55 m thick. The resulting polyester separators are 75% porous, highly permeable (Gurley number (s/100 mL) = 6), and have good wettability with conventional carbonate-based electrolyte. In NMC/graphite lithium-ion cells, results show comparable performance to commercially available polyolefin separators (rate, capacity fade, and reactivity) but with improved thermal stability to >200 degrees C. The use of this higher melting temperature polymer separator is one approach to close the gap between potential thermal instabilities (softening, shrinking, melting, etc.) of separators and the onset of thermal runaway reactions of commonly used cathode materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available