Few-layered MoSe2 ultrathin nanosheets as anode materials for lithium ion batteries

In this study, ultrathin MoSe2 (Mo-MoSe2) was prepared by a jet cavitation process. XRD, SEM, TEM and AFM were carried out to study the crystal structure, surface morphology and lateral size distribution of bare MoSe2 and Mo-MoSe2. The corresponding electrochemical measurements, including charge/discharge tests, cyclic voltammetry as well as AC menace and cycle life tests of bare MoSe2 and Mo-MoSe2 are also carried out. The results indicate that the reversible capacity of bare MoSe2 and Mo-MoSe2 are 453 mAh g(-1) and 496 mAh g(-1), respectively. The rate capability tests show that the charge and discharge capacities of Mo-MoSe2 under 5C and 10C are 381 mAh g(-1) and 325 mAh g(-1), respectively, which was much higher than those of pristine one for 163 mAh g(-1) and 129 mAh g(-1). The above results indicate that Mo-MoSe2 demonstrate excellent reversible capacity, stable cycle life and good rate capability. These results indicate that the as-synthesized few-layered MoSe2 is a potential candidate for lithium ion battery applications. (C) 2019 Elsevier B.V. All rights reserved.