Abstract
Lithium trivanadate (LiV3O8) and lithium vanadate (LiXV2O5) composites were synthesized by a solid-state method in order to obtain higher capacity and electrical conductivity. Two types of LiXV2O5 combined with LiV3O8 were obtained depending on the heating temperature. To determine the optimal ratio of the two materials, the cells assembled with these composites were cycled at a rate of 0.2C, and each component was analyzed by the Rietveld refinement. The LiV3O8/LiXV2O5 composites synthesized at 600 °C showed a higher discharge capacity and better capacity retention (259 mA h g−1 and 85%, respectively, after the 50th cycle) compared to those synthesized at other temperatures. The composites were characterized by thermogravimetric analysis, X-ray diffraction, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, and particle size analysis. The electrochemical performance was analyzed using a battery testing system and impedance spectroscopy. The composites have increased intrinsic electrical conductivity with high lithium-ion coefficients, reduced electrochemical reaction resistance, and homogeneous particle size distributions with large surface areas. Therefore, the optimally synthesized composites are promising cathode materials for direct application in new battery systems using lithium.
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.
