Huadong Yuan, Jianhui Zheng, Gongxun Lu, Liang Zhang, Tianran Yan, Jianmin Luo, Yao Wang, Yujing Liu, Tianqi Guo, Zhongchang Wang, Jianwei Nai, Xinyong Tao
Lithium-sulfur (Li-S) batteries, operated through the interconversion between sulfur and solid-state lithium sulfide, have been regarded as next-generation energy storage systems. However, the sluggish kinetics of lithium sulfide deposition/dissolution, caused by its insoluble and insulated nature, hampers the practical use of Li-S batteries. Herein, leaf-like carbon scaffold (LCS) with the modification of Mo2 C clusters (Mo2 C@LCS) is reported as host material of sulfur powder. During cycles, the dissociative Mo ions at the Mo2 C@LCS/electrolyte interface are detected to exhibit competitive binding energy with Li ions for lithium sulfide anions, which disrupts the deposition behavior of crystalline lithium sulfide and trends a shift in the configuration of lithium sulfide towards an amorphous structure...
April 25, 2024: Advanced Materials