Article Title

MoS₂ embedded in 3D interconnected carbon nanofiber film as a free-standing anode for sodium-ion batteries

Authors

Hai Yang, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Min Wang, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Xiaowu Liu, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Yu Jiang, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Yan Yu, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China

Keywords

MoS2, sodium ion battery, flexible electrode, three-dimensional (3D) interconnected carbon nanofiber

Abstract

ABSTRACT As a typical two-dimensional transition metal dichalcogenide, molybdenum disulfide (MoS2) is considered a potential anode material for sodium-ion batteries (NIBs), due to its relatively high theoretical capacity (~ 670 mAh·g–1). However, the low electrical conductivity of MoS2 and its dramatic volume change during charge/discharge lead to severe capacity degradation and poor cycling stability. In this work, we developed a facile, scalable, and effective synthesis method to embed nanosized MoS2 into a thin film of three-dimensional (3D)-interconnected carbon nanofibers (CNFs), producing a MoS2/CNFs film. The free-standing MoS2/CNFs thin film can be used as anode for NIBs without additional binders or carbon black. The MoS2/CNFs electrode exhibits a high reversible capacity of 260 mAh·g–1, with an extremely low capacity loss of 0.05 mAh·g–1 per cycle after 2,600 cycles at a current density of 1 A·g–1. This enhanced sodium storage performance is attributed to the synergistic effect and structural advantages achieved by embedding MoS2 in the 3D-interconnected carbon matrix.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-017-1958-8

Publisher

Tsinghua University Press

Recommended Citation

Hai Yang,Min Wang,Xiaowu Liu,Yu Jiang,Yan Yu, MoS2 embedded in 3D interconnected carbon nanofiber film as a free-standing anode for sodium-ion batteries. NanoRes.2018, 11(7): 3844–3853