| 초록 |
Magnesium-based batteries are a very attractive alternative to Li-ion batteries. Molybdenum trioxide was used as a host material. It has attracted considerable attention due to its typical two-dimensional layered structure consisting of double layers of edge- and vertex-sharing MoO6 octahedra being weakly held together by van der Waals bonds. We introduced facile synthesis method to decrease MoO3 particle size and improve electrode kinetics. The electrochemical magnesium intercalation into MoO3 has been confirmed by cyclic voltammetry, galvanostatic discharge/charge, powder XRD and EDS measurements. Reversible reduction and oxidation peaks were observed in cyclic voltagramms as well as discharge/charge cycles, corresponding to magnesium insertion and deinsertion. The reversibility was also confirmed by XRD measurement which also showed that a new phase is formed during the discharge and the discharge/charge processes are pseudo two-phase reactions. With cycles, a degradation in crystallinity was observed. We demonstrate the successful Mg2+ intercalation into MoO3 host material, and the new crystal structure of MgxMoO3 has been characterized for the first time through the structure determination from XRD. |
