Penne‐Like MoS 2 /Carbon Nanocomposite as Anode for Sodium‐Ion‐Based Dual‐Ion Battery

作者：Haili Zhu, Fan Zhang, Jingrui Li, Yongbing Tang · 发表于：Small · 年份：2018 · DOI：10.1002/smll.201703951 · 被引用次数：131 · 研究领域：Advancements in Battery Materials、Advanced Battery Materials and Technologies、Supercapacitor Materials and Fabrication

Abstract The dual‐ion battery (DIB) system has attracted great attention owing to its merits of low cost, high energy, and environmental friendliness. However, the DIBs based on sodium‐ion electrolytes are seldom reported due to the lack of appropriate anode materials for reversible Na + insertion/extraction. Herein, a new sodium‐ion based DIB named as MoS 2 /C‐G DIB using penne‐like MoS 2 /C nanotube as anode and expanded graphite as cathode is constructed and optimized for the first time. The hierarchical MoS 2 /C nanotube provides expanded (002) interlayer spacing of 2H‐MoS 2 , which facilitates fast Na + insertion/extraction reaction kinetics, thus contributing to improved DIB performance. The MoS 2 /C‐G DIB delivers a reversible capacity of 65 mA h g −1 at 2 C in the voltage window of 1.0–4.0 V, with good cycling performance for 200 cycles and 85% capacity retention, indicating the feasibility of potential applications for sodium‐ion based DIBs.