Core-Shell Structure of Mo-Based Nanoparticle/Carbon Nanotube/Amorphous Carbon Composites as High-Performance Anodes for Lithium-Ion Batteries

For large-scale energy storage devices, lithium-ion batteries (LIBs) are leading candidates for applications in electric vehicles. However, further research efforts are needed to maximize their capacity and stability. In this report, a core-shell structure of molybdenum-based nanoparticle/carbon nanotube (CNT)/carbon is synthesized successfully through facile hydrothermal/annealing processes and applies for anode materials in LIBs. The good conductivity of the CNT core and the uniform nanoparticle of molybdenum-based compounds in the buffer matrix of the amorphous carbon shell result in a high capacity of 810 mA h g(-1) for anode LIBs, an excellent stability for 500 cycles, and a Coulombic efficiency of similar to 98%. Our study reveals that ultrafine nanoparticles of molybdenum-based compounds can enhance the pseudocapacitance. The conductivity of the CNT is the main contributor to the improved stability for lithium-ion storage at a high current density. This approach can be used for further improvement of structural design and material synthesis for anode LIBs.

Automated summary

In this study, a core-shell structure of molybdenum-based nanoparticle/carbon nanotube (CNT)/carbon is successfully synthesized and applied as anode material for lithium-ion batteries (LIBs). The research shows that this structure can improve the capacity and stability of LIBs, with ultrafine nanoparticles enhancing pseudocapacitance and the conductivity of CNT contributing to stability at high current density.