Kinetics enhancement of lithium-sulfur batteries by interlinked hollow MoO sphere/nitrogen-doped graphene composite

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2017-12, Vol.5 (48), p.25187-25192
• Main Authors: Wu, Xian, Du, Ying, Wang, Pengxiang, Fan, Lishuang, Cheng, Junhan, Wang, Maoxu, Qiu, Yue, Guan, Bin, Wu, Hexian, Zhang, Naiqing, Sun, Kening
• Format: Article
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/c7ta08859k

The shuttle effect and poor redox kinetics are vital issues restricting the evolution of lithium sulfur batteries; it is therefore exigent to rationally design an effective sulfur host. Hence, this paper reports a hollow MoO 2 sphere anchored on nitrogen-doped graphene. The hollow MoO 2 sphere controls the polysulfide dissolution, and the nitrogen-doped graphene provides a conductive network and high sulfur loading. Meanwhile, the C-O-Mo bond interlinking MoO 2 and N-doped graphene provides a pathway for electron transfer, and the synergistic effect enhances the kinetics of lithium sulfur batteries profitably. Ascribed to the unique structure of MoO 2 /nitrogen-doped graphene, the obtained electrode exhibits a substantially enhanced electrochemical performance. This communication reports an interlinked MoO 2 and N-rGO composite as sulfur host for high-performance lithium sulfur battery.