Abstract
For last three decades, Li-ion batteries are the energy storage device of choice; however, the limited theoretical capacity hampers its wide adaption in many applications. Li metal batteries (LMBs) encompassing a lithium metal anodes with sulfur/layered oxide-based cathode material (Li-S and Li-NMC532) provide a sustainable possibility to improve energy/power density. However, thermal safety and overall stability issues continues to hinder its use in practical applications. In spite of the significant effort to alleviate the cycle life of LMBs, the thermal safety aspects of these systems remain unknown, therefore could lead to thermal runaway under extreme conditions. This talk will provide an understanding of the thermal stability of LMBs from materials level to cell level. The amount of exothermic heat generated for Li-NMC (2.9 KJ/g) and Li-S (188 J/g) from the coin cell DSC analysis shows amplified safety risk in Li-NMC532 batteries.
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