The article by Yu-Sheng Su and Arumugam Manthiram presents a novel approach to enhancing the performance of lithium-sulfur (Li-S) batteries. The key innovation is the use of a microporous carbon paper (MCP) as a bifunctional interlayer between the cathode and separator. This interlayer significantly improves both the active material utilization and cycle life of the battery without requiring complex synthesis or surface modifications. The MCP acts as an upper current collector for the low-conductivity sulfur cathode, enhancing charge transfer and active material utilization. It also serves as a polysulfide stockroom, trapping and reutilizing soluble polysulfides, which helps maintain battery performance over multiple cycles. The study demonstrates that this simple cell configuration modification can lead to a commercially feasible Li-S battery with high capacity and long cycle life. The MCP's microporous structure effectively reduces internal resistance and localizes polysulfides, making it a promising solution for advancing Li-S battery technology.The article by Yu-Sheng Su and Arumugam Manthiram presents a novel approach to enhancing the performance of lithium-sulfur (Li-S) batteries. The key innovation is the use of a microporous carbon paper (MCP) as a bifunctional interlayer between the cathode and separator. This interlayer significantly improves both the active material utilization and cycle life of the battery without requiring complex synthesis or surface modifications. The MCP acts as an upper current collector for the low-conductivity sulfur cathode, enhancing charge transfer and active material utilization. It also serves as a polysulfide stockroom, trapping and reutilizing soluble polysulfides, which helps maintain battery performance over multiple cycles. The study demonstrates that this simple cell configuration modification can lead to a commercially feasible Li-S battery with high capacity and long cycle life. The MCP's microporous structure effectively reduces internal resistance and localizes polysulfides, making it a promising solution for advancing Li-S battery technology.