Abstract
We demonstrate the hollow triple-shelled SiO2/TiO2/polypyrrole (Ppy) nanospheres (NSs), which are readily synthesized through the hard templating method and sequential vapor deposition polymerization (VDP), for application in lithium ion battery (LIB) anodes. The resultant NSs with a hetero-composition show a uniform hollow spherical nanomorphology consisting of SiO2, TiO2, and Ppy layers, as verified by the Si, Ti, C, and O signals of the STEM images. The hollow SiO2/TiO2/Ppy NSs have about a threefold higher capacity of 433mAh/g compared to 147mAh/g of TiO2 at a specific current of 44mA/g, which is close to the theoretical value of TiO2. In particular, the hollow triple-shelled NSs exhibit good rate (76% capacitance retention in the range of 44−440mA/g) and cyclic (98% in the fifty cycles) performances due to the reversible redox reaction occurring on the Ppy outer shell. The enhanced performance of the SiO2/TiO2/Ppy NSs is attributed to the synergistic effect of the 0D nanostructure and hetero-composition.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
