A 3D Multilevel Heterostructure Containing 2D Vertically Aligned MoS2 Nanosheets and 1D Sandwich C-MoS2-C Nanotubes to Enhance the Storage of Li+ Ions

• Published in: Nanomaterials (Basel, Switzerland) Vol. 13; no. 14; p. 2088
• Main Authors: Zhao, Yiyang, Luo, Wenhao, Luo, Huiqing, Liu, Xiaodi, Zheng, Wenjun
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 18.07.2023; MDPI
• Subjects: Carbon; Carbon nanotubes; Communication; Composite materials; Conductivity; Crystal structure; Current density; Design; Electric vehicles; Electrodes; Electrolytes; Electron transport; Electrons; Glucose; Graphite; Heat treatment; Heterostructures; lithium-ion batteries; Molybdenum disulfide; MoS2; Nanosheets; Nanotechnology; Nanotubes; sandwich heterostructure; Solid lubricants; Spectrum analysis; Structural stability; Vans; United States > US; China
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano13142088

To overcome the disadvantages of the MoS2 anode for LIBs in terms of low intrinsic conductivity, poor mechanical stability, and adverse reaction with electrolytes, a 3D multilevel heterostructure (VANS-MoS2-CNTs) has been successfully prepared by a simple hydrothermal method followed by thermal treatment. VANS-MoS2-CNTs are made up of 2D vertically aligned MoS2 nanosheets (VANS) and 1D sandwich C-MoS2-C nanotubes (CNTs). The sandwich-like nanotube is the core part, which is made up of the MoS2 nanotube covered by carbon layers on both side surfaces. Due to the special heterostructure, VANS-MoS2-CNTs have good conductivity, high structured stability, and excellent Li+/electron transport, resulting in high discharge capacity (1587 mAh/g at a current density of 0.1 A/g), excellent rate capacity (1330 and 730 mAh/g at current densities of 0.1 and 2 A/g, respectively), and good cyclic stability (1270 mAh/g at 0.1 A/g after 100 cycles).