Superelastic 3D few-layer MoS2/carbon framework heterogeneous electrodes for highly reversible sodium-ion batteries. (June 2018)

• Record Type: Journal Article
• Authors: Zhao, Zhi-Hao; Hu, Xu-Dong; Wang, Hongqiang; Ye, Meng-Yang; Sang, Zhi-Yuan; Ji, Hui-Ming; Li, Xiao-Lei; Dai, Yejing
• Is Part Of: Nano energy. Volume 48(2018)
• Page Start: 526
• Page End: 535
• Publication Date: 2018-06
• Subjects: Superelastic electrodes -- 3D hierarchical structure -- Sodium-ion batteries; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2018.03.060
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Rational design of electrode materials for sodium-ion batteries with high flexibility is still challenging. Here, superelastic 3D few-layer MoS2 /carbon framework heterogeneous electrodes (abbreviated as, MoS2 @CF ) are fabricated by a simple vacuum infiltration and heating process. The interconnected ultrathin MoS2 network filled with carbon framework forms a 3D heterogeneous network with hierarchical pore structure. The unique structure of the electrodes results in excellent mechanical and electrochemical performances. The MoS2 @CF electrodes exhibit superior elasticity and recoverability. After 180° bending repeatedly, the electrodes still can recover their initial sizes. Moreover, the electrodes show outstanding cycling stabilities with high reversible capacities reaching up 240 mA h g −1 after 500 cycles at 1 A g −1 (capacity retention of ~ 99%). Full-cells assembled with MoS2 @CF anodes and Na3 V2 (PO4 )3 cathodes show high reversible capacity (~ 252 mA h g −1 at 0.5 A g −1 ). Overall, the superior mechanical properties and high electrochemical performances indicate the promising potential of MoS2 @CF electrodes in large-scale flexible sodium-ion storage devices. Graphical abstract: fx1 Highlights: Superelastic and recoverable heterogeneous MoS2 @CF electrodes is prepared. Hierarchical pore structure in interconnected ultrathin MoS2 nanosheet network is achieved in MoS2 @CF electrodes. The MoS2 @CF electrodes show stable electrochemical performance and high Na-storage ability. Full-cells assembled with MoS2 @CF anodes show huge potential applications in flexible energy storage devices.