Chemical vapor deposited MoS2/electrospun carbon nanofiber composite as anode material for high-performance sodium-ion batteries. (20th December 2016)

• Record Type: Journal Article
• Authors: Chen, Chen; Li, Guoqing; Lu, Yao; Zhu, Jiadeng; Jiang, Mengjin; Hu, Yi; Cao, Linyou; Zhang, Xiangwu
• Is Part Of: Electrochimica acta. Volume 222(2016)
• Page Start: 1751
• Page End: 1760
• Publication Date: 2016-12-20
• Subjects: Molybdenum disulfide -- carbon nanofiber -- chemical vapor deposition -- electrospinning -- sodium-ion battery anode; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.11.170
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: The nano-sized carbon provide tremendous sites for MoS2 . The CNF conductive pathway significantly improved the charge transfer. MoS2 anchored CNFs show high specific capacity and good rate capability. Abstract: Due to its high theoretical capacity and unique layered structure, MoS2 has attracted attention as a sodium-ion battery anode material. However, the electrochemical performance of MoS2 based anodes is hindered by their low intrinsic conductivity and large volume change during cycling. In this report, nano-sized MoS2 sheets are synthesized using a scalable chemical vapor deposition method on the surface of electrospun carbon nanofibers (CNFs). The morphology of the resultant MoS2 @CNFs is investigated by scanning electron microscopy, transmission electron microscopy and X-ray diffraction, while their electrochemical performance is studied using cyclic voltammetry and galvanostatic charge-discharge. The results demonstrate that a strong interconnection between MoS2 nanosheets and CNFs is formed and the conductive network of CNFs is beneficial for the sodium ion kinetics. When investigated as an anode for sodium-ion batteries, a high reversible capacity of 380 mA h g −1 is obtained after 50 cycles with good cycling stability. In particular, MoS2 @CNFs can deliver a capacity of 198 mA h g −1 under a high current density of 1 A g −1 after 500 cycles, indicating their great potential as anode material for long-life sodium-ion batteries.