AEROXIDE® fumed alumina increases the safety of Lithium-ion battery cells
The Challenge
The separator is a crucial element in a Lithium-ion battery cell: A porous, polymeric membrane made of PE or PP separates the electrodes from each other to prevent a short circuit.
A separator should be as thin as possible, and at the same time provide maximum safety. Ceramic coating of separators is state-of-the art to get very thin separators with very high safety. However, the ceramic particles used to build up the coating (mainly alumina and boehmite) are often too large to achieve ultra-thin ceramic coatings.
