Abstract
SnO2 hollow spheres are doped with different contents of Al (1, 1.5, 2at.%) by a one-step hydrothermal reaction. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM) and Brunauer–Emmett–Teller (BET) are utilized to characterize the structures, components, chemical environments, morphologies and specific areas of the as-prepared samples. The investigation in cycling performances demonstrates that 1.5at.% Al-doped SnO2 hollow spheres exhibit the best cycling stability, with a specific capacity of 443mAhg−1 and coulombic efficiency of 99.1% after 50cycles at 0.1C, much higher than those of the pristine SnO2 hollow spheres and the other Al-doped samples. The improved electrochemical performances of Al-doped SnO2 hollow spheres are attributed to the increase of electronic conductivity and lithium ion diffusion coefficient, and therefore, enhance the reversible capacity and cycling properties.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.