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Seminar | Applied Materials Division

Impact of Mechanical Stress on Lithium Dendrite Growth

AMD Seminar

Abstract: Next-generation lithium-ion batteries (LIBs) are expected to demonstrate high energy and power density to fulfill the 350-mile range required for future electric vehicles (EVs). Lithium metal shows very high theoretical specific capacity (3870 mAh/g) and low reduction potential (-3.4 V with respect to H/H+ electrode), which is significantly better than commercially used graphite-based anodes. However, growth of dendritic protrusions during lithium plating (charging process) has the potential to internally short circuit the cell, which can lead to localized heating and thermal runaway of the cell. It has been hypothesized that use of solid electrolyte should prevent the growth of dendritic protrusions. From an experimental perspective, it has been observed that by increasing the elastic modulus of polymer electrolytes by approximately one order of magnitude, the growth rate of the dendritic protrusion can be decreased significantly. The impact of mechanical stress on preventing dendrite growth will be investigated from a computational perspective, and new strategies to achieve stable deposition of lithium will be discussed.