A freestanding hollow carbon nanofiber/reduced graphene oxide interlayer for high-performance lithium-sulfur batteries

作者：Zhang, Zhian^*; Wang, Guanchao; Lai, Yanqing^*; Li, Jie

来源：Journal of Alloys and Compounds, 2016, 663: 501-506.

DOI：10.1016/j.jallcom.2015.11.120

• Lithium-sulfur batteries
• Interlayer
• Polysulfides

Rechargeable lithium-sulfur (Li-S) batteries have attracted more and more attention in recent years, and a large number of efforts have been made to improve their electrochemical performance. Herein, a freestanding hollow carbon nanofiber/reduced graphene oxide (HCNF/rGO) interlayer is prepared by simple method via vacuum filtration and heat treatment. The utilization of the HCNF/rGO interlayer enables the inhabitation of the diffusion of polysulfides and offers unobstructed channels for ions and electrons. An initial specific discharge capacity of 1318.4 mAh g(-1) at 0.2 C and a capacity fade of 0.13% per cycle at 1 C of Li-S cells with the HCNF/rGO interlayer are achieved. Meanwhile, the cells exhibit outstanding rate capability with a discharge capacity of 630 mAh g(-1) at a discharge current density of 10 C. Therefore, a HCNF/rGO interlayer with specific structure demonstrates potential for high-performance Li-S batteries.

• 出版日期2016-4-5
• 单位中南大学