Synthesis, structural and microstructural study of new FeNa0.5H1.5MoO5 hybrid material for highly efficient energy storage hybrid systems

• Published in: Inorganic chemistry communications 2020-03, Vol.113, p.107811, Article 107811
• Main Authors: Aloui, Thamer, Fourati, Najla, Guermazi, Hajer, Zerrouki, Chouki, Guermazi, Samir
• Format: Article
• Language: English
• Subjects: Crystal structure; Engineering Sciences; Hydrothermal synthesis; Microstructural model; Nanomaterials
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2020.107811

[Display omitted] •A new hybrid nanomaterials FeNa0.5H1.5MoO5 was successfully prepared via hydrothermal method.•3D crystal structure optimized by Rietveld model is proposed.•The FeNa0.5MoH1.5O5 particular structure make it promising for highly efficient energy storage hybrid systems. New hybrid compound FeNa0.5H1.5MoO5 was synthetized by hydrothermal method, an ecofriendly, simple and efficient process. The structural/nanostructural and morphological properties of the synthetized particle were determined by means of various characterization technics. Combined scanning electron microscopy and Energy dispersive X-ray analysis revealed spheroidal morphology of the nanoparticles and permitted to reach the effective atomic ratio. Thus, we determined the composition. Fourier Transform Infrared Spectroscopy analysis allowed to stoichiometric estimate the force constants of MoO and FeO bonds, that strongly depend on ionic radius and crystallographic network. X-ray diffraction results showed a pure monoclinic phase with preferential orientation growth along the (1 1 0) direction. The crystallite sizes and the micro-strain values were estimated and discussed according to the considered models. Based on Rietveld refinement, an optimized 3D structure was proposed, where MoO4 tetrahedral sites alternate with FeO6 octahedral ones. This arrangement leads to a large tunnel-like interstitial space that favors ions diffusion. Consequently, the new hybrid compound FeNa0.5H1.5MoO5 is suitable for applications involving charge transport, such as solid electrolytes. As well, this study can pave the way to highlight the relation between structure and properties in Na-ion storage/diffusion electrochemical applications.