Confine Sulfur in Mesoporous Chromium-Metal–Organic Frameworks (MIL-101) for Long-life Lithium–Sulfur Batteries

摘要

Large surface area and mesoporous Chromium-Metal–Organic Frameworks (MIL-101(Cr)) have beenprepared as a sulfur host for long-life Li-S batteries. The MIL-101(Cr)/S cathode exhibits excellentelectrochemical performance, high initial discharge capacity of 1210.5 mAh g-1 at 0.1 C and a retentivecapacity of 60.1% after 400 cycles at 0.2 C. Especially, the capacity contributed by the first platform ofthe discharge is only attenuated by 66.71mA g-1 at the current density of from 0.1C increasing to 0.5C,which means that MIL-101(Cr)/S can obviously inhibit the occurrence of the shuttle effect.Experimental results indicate that the MIL-101(Cr) is a potential host material for the long-life andhigh performance lithium–sulfur batteries.