Preparation and Modification of MIL-101(Cr) Metal Organic Framework and Its Application in Lithium-Sulfur Batteries
Guangjie Gao, Wangjun Feng, Wenxiao Su, Shejun Wang, Linjing Chen, Miaomiao Li, Changkun Song
Abstract
Lithium sulfur batteries have high theoretical specific capacity and good application prospects. In this paper, large surface area mesoporous chromium MIL-101 (Cr) metal organic framework has been prepared by hydrothermal method and composite with carbon nanotubes (CNTs) as the houst of sulfur. The composite electrode material of MIL-101@CNT/S shows the excellent electrochemical performance. Especially the MIL-101@5%CNT/S composite electrode material, when the current density at 0.1C, it has a high initial discharge capacity of 1236.7 mA h g -1 , and its specific capacity retention rate reaches 53.4% after 200 cycles. What’s more, thanks to the addition of CNTs, the results have better high multiplier performance than MIL-101 (Cr)/S, and the capacity contributed by the second platform has been improved.