Three-Dimensional S/CeO2/RGO Composites as Cathode Materials for Lithium-Sulfur Batteries

摘要: In this paper, the synthesis of three-dimensional (3D) composite spherical reduced graphene oxide (RGO) with uniformly distributed CeO₂ particles is reported. This done via a facile and large-scalable spray-drying process, CeO₂/RGO materials are hydrothermally compounded sulfur. The morphology, composition, structure, electrochemical properties 3D S/CeO₂/RGO studied using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission microscopy (TEM), thermal gravimetric analysis (TGA), Raman spectra photoelectron spectroscopy (XPS), etc. performance composites as electrodes for lithium⁻sulfur batteries evaluated. deliver high initial capacity 1054 mAh g-1, retain reversible 792 g-1 after 200 cycles at 0.1 C. Profiting from combined effect RGO, effectively inhibit dissolution polysulfides, coating RGO improves structural stability well conductivity.