| 초록 |
Dissolution and diffusion of LiPSs is a major obstacle hindering the performance of lithium-sulfur batteries. Various approaches have recently been developed to prevent these LiPSs issues. Melt-diffusion of sulfur into porous carbon is a representative solution for blocking the diffusion of LiPSs, which is focusing on confinement of sulfur. However, in lithium-sulfur battery where the active materials dissolve into electrolyte, mass transport of LiPSs is important consideration factor for achieving high performance of battery. Capacity of sulfur cathode using melt-diffusion is well conserved in carbon with small pores because of their high surface area, while the cathode using catholyte has superior performance in carbon with large pores due to their rapid mass transport. The comparison with the four different combinations that controlled mass transport reveals that proper selection of initial state of starting materials is important to fabricate optimal cell using porous carbons. |
