Synthesis, characterization, and electrochemical evaluation of SnFe(2)O(4)@MWCNT(S) nanocomposite as a potential hydrogen storage material

The widespread use of hydrogen as a vehicle fuel has prompted us to develop a new nanocomposite by immobilizing of tin ferrite nanoparticles (SnFe(2)O(4)) on the surface of multi-walled carbon nanotubes (abbreviated as MWCNT(S)) for the first time. The prepared nanocomposite powder (SnFe(2)O(4)@MWCNT(S)) was investigated utilizing various microscopy and spectroscopy methods, such as FT-IR, XRD, SEM, EDX, and BET techniques. Moreover, the electrochemical property of SnFe(2)O(4)@MWCNT(S) nanocomposite was investigated by cyclic voltammogram (CV) and charge–discharge chronopotentiometry (CHP) techniques. A variety of factors on the hydrogen storage capacity, such as current density, surface area of the copper foam, and the influence of repeated hydrogen adsorption-desorption cycles were assessed. The electrochemical results indicated that the SnFe(2)O(4)@MWCNT(S) has high capability and excellent reversibility compared to SnFe(2)O(4) nanoparticles (NPs) for hydrogen storage. The highest hydrogen discharge capability of SnFe(2)O(4)@MWCNTs was achieved [Formula: see text] 365 mAh/g during the 1st cycle, and the storage capacity enhanced to [Formula: see text] 2350 mAh/g at the end of 20 cycles using a current of 2 mA. Consequently, the SnFe(2)O(4)@MWCNT(S) illustrated great capacity as a prospective active material for hydrogen storage systems.