Controlling Polysulfide Shuttling in Lithium-Sulfur Batteries
The major drawback of a lithium-sulfur battery is the polysulfide shuttling [3, 4] between anode and cathode, which induces low Coulombic efficiency, low utilization of the sulfur cathode, and severe degradation of cycle life. In this work, an electrochemical engineering model [2, 5, 8, 9] is used to understand the shuttling mechanism. In particular, the electrochemical engineering model will be reformulated for improved computational efficiency to enable real-time simulation and model based control [6, 7]. The control of polysulfide shuttle across the electrodes will be explored by obtaining optimal charging profiles. Controlling the polysulfide shuttling would ensure a longer battery life for the lithium-sulfur battery .
The work presented herein was funded in part by the Clean Energy Institute at the University of Washington, Seattle.
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