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Safire and Glatfelter partner to develop new separator for shear thickening battery technology

Safire Technology Group, Inc., a venture-backed company developing advanced battery safety technologies (earlier post), and Glatfelter Corporation, a leading global supplier of engineered materials, have announced a strategic partnership to develop a new battery separator optimized for Safire Group’s SAFe Impact Resistant Electrolyte (SAFIRE) for customers seeking increased performance and safety from their Lithium-ion (Li-ion) powered applications.

The SAFIRE electrolyte is a liquid under normal operating conditions, allowing solvents to wet all the electrode surfaces and perform just like a traditional battery electrolyte. However, upon kinetic impact the additive causes the electrolyte to undergo an immediate and massive rheological shift to become a solid.

This additive is larger than the pore sizes within a battery electrode. As a result, the colloidal particles do not interact extensively with the electroactive surface. Furthermore, the passivation reactions derived from the reaction with the liquid electrolyte and electrodes remain the same. Due to this geometry the SAFIRE cells have the same cycling performance as a standard lithium-ion battery.

The new separator material will first be integrated in Li-ion batteries being developed by Safire Group for the United States Air Force.

The partnership brings together Glatfelter’s expertise in developing innovative and sustainable non-woven solutions with Safire Group’s shear-thickening battery technology to offer customers safer, higher performing Li-ion powered systems.


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