| 초록 |
Multiscale porous sturcture are desired to address the limitations for single-sized porous structures, and to combine the merits of different pore scales. Even though a few carbonaceous materials with multiscale porous architectures are employed in Li-S batteries, their nonpolar surface properties lead to the severe dissolution of lithium polysulfides (LiPS). In this contribution, multiscale porous architecture design of nanoncarbonaceous materials is highly needed, but has not been exploited in Li-S batteries yet due to the absence of a facile synthetic method to control the multiscale porous inorganic materials. Here, a hierarchically porous titanium nitride (h-TiN) is reported as a catalytic sulfur host materials, integrating the merits of multiscale porous structures with intrinsic surface properties of TiN to achieve high-rate and long-life Li-S batteries. Therefore, h-TiN/S shows a high reversible capacity and retention ratio with ultralow capacity decay per cycle. |
