4.6 Article

Enhanced Safety Performance of Automotive Lithium-Ion Batteries with Al2O3-Coated Non-Woven Separator

Journal

BATTERIES & SUPERCAPS
Volume 4, Issue 1, Pages 146-151

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/batt.202000169

Keywords

thermal runaway; nail test; mechanism; coated non-woven separator; lithium-ion battery

Funding

  1. National Natural Science Foundation of China [U1804255, 18ZXJMTG00200]
  2. Fundamental Research Funds of Tianjin University of Technology
  3. Natural Science Foundation of Shandong Province [ZR2017BEM020]

Ask authors/readers for more resources

This study demonstrates the robust thermal stability of Al2O3-coated non-woven separators in automotive batteries, showing promising prospects in preventing thermal runaway and enhancing safety performance.
Thermal runaway (TR) is the fatal safety defects that hinder the wide application of automotive batteries. The short circuit caused by shrinkage of separators under high temperatures leads to TR. In this paper, we demonstrate the robust thermal stability of an Al(2)O(3)coated non-woven polyethylene terephthalate (PET) separator. The shrinkage ratio of the Al(2)O(3)coated separator has been compared with the non-coated polyethylene (PE) separator by differential scanning calorimetry (DSC), thermogravimetry (TG ) and heat nail tests. Automotive lithium-ion batteries (LIBs) with large capacities have been used to conduct the simulations of nail penetration. TR is found to be triggered by Joule heat generation during the shrinkage of the separators. The separator with lower shrinkage retains highly stable dimension against wide range temperature changes. This feature enables the Al(2)O(3)coated separator to prevent inner short circuits. The improved safety performance indicates a promising prospect of Al(2)O(3)coated non-woven separators in LIBs.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available