Thursday, 2 June 2022: 10:40
West Meeting Room 202 (Vancouver Convention Center)
Nano porous carbon and sulfur composites were prepared using microalgae as carbon precorsors by the melt diffusion method. Initially, nano porous carbon materials were synthesized by the hydrothermal method, followed by the chemical activation method with and without ferrocene as catalyst. Therefore, we have two types of porous carbon samples, the first sample was denoted as NPC (preparation with ferrocene) and the other one is PC (preparation without ferrocene) Brunauer–Emmett–Teller analysis indicated that the surface area and total pore volume (at P/Po) of NPC samples were lower than those of the PC samples. The NPC and PC samples were then mixed with sulfur to obtain NPC-S and PC-S composites. Those composites were then utilized as cathode materials for Lithium Sulfur Battery. The NPC-S samples with a sulfur content of 76.7 wt.% exhibited a higher initial specific capacity and better cycle retention than those of the PC-S. Optimized sulfur content for NPC-S was investigated to handle the shuttle effect problem. improved electrochemical performance is attributed to the increased conductivity of the NPC-S samples and optimized sulfur loading content, which effectively confined lithium polysulfide intermediates.