Aerogel

A synthetic porous ultralight foam material derived from a gel, in which the liquid component for the gel has been replaced with a gas. Possible uses in battery packs based on it’s thermal insulation properties.

CATL Qilin battery pack
Aerogel used on the ends of the prismatic cells as a barrier to thermal propagation on the CATL Qilin pack.

References

  1. Chen, Y., Sheng, R., & Chen, M. (2026). Towards Enhanced Battery Thermal Safety: A Lightweight and Mechanically Robust Aerogel with Superior Insulation. Gels, 12(1), 54. https://doi.org/10.3390/gels12010054

See also: Thermal Barrier Materials, Mica