Li-S Energy Limited announced its semi-solid-state lithium sulfur (Li-S) battery cells have successfully passed a rigorous series of nail penetration tests with the results exceeding both civilian and US military performance standards.
A total of 28 cells were tested, with the cells exceeding the requirements of the civilian UL2271 and UL2580 standards and the US Military Performance Specifications MIL-PRF-32383/4X requested by the company?s aerospace partners. Nail penetration tests involve penetrating the battery cell with a steel nail under precise conditions in a blast proof test chamber. The purpose is to determine what happens to a battery cell if it is damaged in an accident, or if there is an internal short circuit. In April 2023 the company announced that its GEN3 semi-solid-state cell chemistry achieved a gravimetric energy density of over 400 Wh/kg, and a volumetric energy density of 540 Wh/l. This is nearly double the gravimetric energy density and comparable for volumetric energy density to current lithium-ion batteries.