MoS2 nanoflakes integrated in a 3D carbon framework for high-performance sodium-ion batteries

• Published in: Journal of alloys and compounds Vol. 797; pp. 1126 - 1132
• Main Authors: Hu, Yang-Yang, Bai, Yu-Lin, Wu, Xue-Yan, Wei, Xiao, Wang, Kai-Xue, Chen, Jie-Sheng
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.08.2019; Elsevier BV
• Subjects: Anode material; Anodes; Carbon; Electrochemical analysis; Electrode materials; Low conductivity; Molybdenum disulfide; MoS2 composite; Porous carbon framework; Rechargeable batteries; Salt template; Sodium ion batteries; Three dimensional composites; MoS2 composite; Anode material; Porous carbon framework; Salt template; Sodium ion batteries
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2019.05.142

Molybdenum disulfide (MoS2), employed for rechargeable sodium-ion batteries (SIBs) as an anode material, has attracted considerable attention attributing to its high Na+ intercalation capability. Nevertheless, MoS2 suffers from low conductivity and large volume expansion upon the discharging/charging. In this work, MoS2 nanoflakes were dispersed into a three-dimensional (3D) porous carbon framework by utilizing salt as hard template, obtaining a 3D porous MoS2/carbon composite. When employed as an anode material for SIBs, the composite shows large specific capacity, good rate capability and cycling stability. A large capacity of 361 mAh g−1 is achieved at 5.0 A g−1 and a capacity of 372 mAh g−1 is still well maintained at 0.5 A g−1 after 200 cycles. The 3D interconnected porous carbon framework is believed to improve the electrochemical performance through accelerating the transportation of electrons and ions, as well as suppressing the volume expansion upon the Na+ insertion and preventing the active materials aggregation. •3D porous MoS2/carbon composite has been fabrication by using in situ generated NaCl crystals as hard templates.•MoS2 nanoflakes dispersed into a three-dimensional (3D) porous carbon framework realizes well interfacial contact.•3D porous MoS2/carbon composite show excellent sodium-ion storage property.