Spinel LiMn2O4 nanoparticles dispersed on nitrogen-doped reduced graphene oxide nanosheets as an efficient electrocatalyst for aluminium-air battery

摘要: Abstract Nitrogen-doped reduced graphene oxide nanosheets modified with LiMn2O4 (LMO) nanoparticles as low cost, nontoxic and efficient catalyst for oxygen reduction reaction (ORR) were synthesized by a simple two step hydrothermal method. The physical properties the activity of composites toward ORR investigated using X-ray diffraction (XRD) spectroscopy, transmission electron microscopy (TEM), photoelectron spectroscopy (XPS), energy dispersive (EDX) spectra, electrochemical measurements, including cyclic voltammograms (CV), steady state polarization curves impedance (EIS) in O2-saturated 0.1 M KOH electrolyte. supported on nitrogen-doped (LMO/N-rGO) showed more positive onset potential, half wave faster charge transfer, higher cathodic peak current alkaline media than that LiMn2O4/rGO N-rGO. Furthermore, air electrodes hybrid catalysts fabricated to test discharged performance Al-air batteries under ambient condition. LMO/N-rGO cathode displayed density 585 mAh g−1 sluggish potential drop. improved catalytic battery can be attributed effect active sites induced nitrogen, synergic covalent coupling between sheets spinel lithium manganese oxide. These results confirm is promising material cathodes good stability aluminium-air battery.