| 초록 |
Lithium-sulfur battery is one of the most probable candidates for the next generation batteries, due to its cheap price and large capacity (1672 mA h/g). However, there are still many problems for commercialization. ⅰ) The insulating nature of sulfur lead to poor active material utilization and low active material loading level. ⅱ) The dissolution of reaction intermediates (Li2SX, 8＞X＞4) lead to active material loss and shuttle phenomena. ⅲ) And precipitation of electrically insulating Li2S2/Li2S materials on the surface of both anode and cathode hinder the mass transference. In order to solve the problems the most effective method is impregnate sulfur into micro- and/or meso-porous carbons by melt-diffusion method. And it was well known that the following heat treatment could dramatically improve the cell performance. In this work, I try to figure out the effect of the further treatment followed by melt-diffusion strategy for sulfur impregnation. |
