Abstract
A highly ordered mesoporous carbon/silica (MCS) framework was used as both a silicate precursor and carbon source to prepare Li2CoSiO4/carbon nanocomposites via hydrothermal synthesis. TEM-EDX and TGA measurements showed that ∼2 wt % carbon was incorporated within Li2CoSiO4 crystal aggregates on the nanoscale. We find that both the morphology and particle size of the Li2CoSiO4/C composites are significantly influenced by the LiOH concentration in the precursors. By controlling the molar ratio of LiOH:Si:Co = 8:1:1, very uniform Li2CoSiO4/C spheres were obtained with an average diameter of 300–400 nm. Many exhibit hollow or core–shell structures. A mechanism is proposed to account for both the unusual morphology and carbon incorporation. Despite some electrolyte oxidation at high potential, the electrochemical properties of the Li2CoSiO4/C composites showed that the nanocarbon played an important role in enhancing the electrochemical performance, when compared with Li2CoSiO4 prepared using fumed silica as ...
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.