Lithium–sulfur batteries are attractive alternatives to lithium-ion batteries because of their high theoretical specific energy and natural abundance of sulfur. However, the polysulfides shuttle and the Li metal dendrite and corrosion significantly limit their cycle life. Moreover, the poor electronic conductivity of sulfur results in low areal sulfur loading and poor utilization, leading to low overall specific energy.<br/>In the past years, we have developed several new strategies to mitigate these probelms, including: (1) Se doing because of much higher electronic conductivity of Se than Sulfur;[ref 1] (2) new electrolytes to directly bypass polysulfides formation and enable reversible Li stripping/plating;[ref 2 and 3]; (3) rational cathode design to boost sulfur reaction kinetics and suppress polysulfides shuttle and Li corrosion (ref 4-6); (4) Advanced Interlayer to minimize the shuttling effect and boost the cell capacity (ref 7.). Through these approaches, we have significantly improve the cycle life and specific energ of Li-S batteries in both coin-cells and pouch-cells.

Advanced cathode, electrolytes and interlayer strategies to enable high-energy Li-S batteries

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