Abstract
Olivine LiFePO 4 and LiFePO 4/C are successfully prepared by a simple solid-state reaction using FePO 4·2H 2O, lithium oxalate and glucose (bare LiFePO 4 without adding glucose) as raw materials. The structure of the LiFePO 4 and LiFePO 4/C is investigated by X-ray diffraction (XRD). The micromorphology of LiFePO 4 and LiFePO 4/C is observed using scanning electron microscopy (SEM) and BET, and the in situ coating of carbon on the particles is observed by transmission electron microscopy (TEM) and Raman spectrum. Furthermore, the electrochemical properties are evaluated by cyclic voltammograms (CVs), electrochemical impedance spectra (EIS) and constant current charge/discharge cycling tests. The results show that carbon coated LiFePO 4 can deliver better battery performance than the bare LiFePO 4. It exhibits initial discharge capacities of 162, 142 and 112 mA h g −1 at rates of 0.1, 1 and 10 C, respectively, and it presents excellent capacity retention as there is tiny capacity fade after 100 cycles. Moreover, the reductive mechanism of using lithium carboxylic acid to synthesize LiFePO 4 is firstly mentioned.
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.
