A strategy of using temporary space-holders to increase the capacity for LiS batteries

Abstract The porous structure within the cathode material influences the capacity and operating performance of Li S batteries. Here, we prepared special carbon material using sodium chloride as template/temporary space-holders to design mixture of micro−/meso−/macroporous structure with large surface area through a facile water bath and freeze-drying process. Such modification led to a high sulfur content of 73.2% with remarkable initial capacity of 1378 mAh g−1 at 0.1 A g−1, and maintains 48.6% after 100 cycles. Moreover, the Li S battery displayed superior rate capability of 807 mAh g−1 at 1.0 A g−1. This abundant micro−/meso−/macropores can improve the content of sulfur, relieve the loss of sulfur and exhibit superior cycling performance and rate capability.