International Journal of Energy Research, Vol.45, No.4, 6418-6425, 2021
MoO2/C hybrid synthesized by a facile molten-salt-assisted approach for high-performance lithium-ion batteries
To combat the serious agglomeration and growth of the active materials, huge volume expansion and sluggish kinetics of metal oxides in the process of Li+ insertion/extraction, constructing hybrid nanostructures aiming to anchor active materials has been pursued. However, it is still limited in terms of capacity decay and complex preparation process. Herein, the hybrid MoO2/C is synthesized through a novel molten-salt-assisted approach, in which isolated small MoO2 nanoparticles were anchored on the well-developed coal-based porous carbon framework. The novel MoO2/C electrodes demonstrate enhanced electrochemical performance as Li+ battery anodes with a higher capacity of 960 mAh g(-1) at 200 mA g(-1), which is attributed to the synergistic effect for the uniform dispersion of MoO2 nanoparticles and coal-based porous carbon layer with abundant active contact sites, which is better by far than the currently reported MoO2-based electrode. Meanwhile, the hybrid MoO2/C exhibited improved extrinsic capacitive characteristics. Therefore, the hybrid MoO2/C constructed by the simple low cost strategy can be a prospective Li-ion battery anode.