Synthesis of β-MoO_3 by vacuum drying and its structural and electrochemical characterisation

摘要

The β-MoO_3 was obtained successfully free of α-MoO_3 through soft chemistry methods. The formation of β-MoO_3 with high purity was determined by the formation of the precursor MoO_3·2H_2O when a solution of Na_2MoO_4·2H_2O was passed through a cation-exchange resin. A structural, spectroscopic and thermal study of the polymorph synthesised was made by XRD, electron dispersion spectroscopy (EDS), FTIR and TGA/DTA techniques, respectively, in order to make a study about the possibilities of β-MoO_3 as active material in a lithium battery. Electrochemical experiments showed a high ability of the β-MoO_3 to form lithium molybdenum bronzes via a lithium insertion reaction.