LiVPO_(4) F has attracted increasing research interest in the field of Li-ion batteries due to its high working voltage platform and high theoretical energy density.However,the construction of stable LiVPO_(4) F catho...LiVPO_(4) F has attracted increasing research interest in the field of Li-ion batteries due to its high working voltage platform and high theoretical energy density.However,the construction of stable LiVPO_(4) F cathode material with excellent electrochemical properties is still a major challenge.Herein,we successfully synthesized spherically shaped LiVPO_(4) F/C via a spray dryingroasting method.X-ray diffraction(XRD)and scanning electron microscopy(SEM)results indicate that the well crystallized LiVPO_(4) F/C with triclinic structure shows spherical morphology with an average diameter of 1-3μm.The spherically shaped LiVPO_(4) F/C delivers a discharge capacity of 137.9 mAh·g^(-1) at 0.1 C rate in the range of3.0-4.5 V and remains 91.4%capacity retention of its initial discharge capacity after 50 cycles.These results reveal that spray drying-roasting method is a promising approach to synthesize spherically shaped LiVPO_(4) F/C cathode material with stable crystal structure and excellent performance.展开更多
基金financially supported by the National Natural Science Foundation of China(51774207,51774210 and 51904194)the Prospective Applied Research from the Technological Innovation Project of Key Industry of Suzhou(SYG201931)+1 种基金Natural Science Research of Jiangsu Higher Education Institutions of China(19KJB450001)Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials(EMFM20182202)。
文摘LiVPO_(4) F has attracted increasing research interest in the field of Li-ion batteries due to its high working voltage platform and high theoretical energy density.However,the construction of stable LiVPO_(4) F cathode material with excellent electrochemical properties is still a major challenge.Herein,we successfully synthesized spherically shaped LiVPO_(4) F/C via a spray dryingroasting method.X-ray diffraction(XRD)and scanning electron microscopy(SEM)results indicate that the well crystallized LiVPO_(4) F/C with triclinic structure shows spherical morphology with an average diameter of 1-3μm.The spherically shaped LiVPO_(4) F/C delivers a discharge capacity of 137.9 mAh·g^(-1) at 0.1 C rate in the range of3.0-4.5 V and remains 91.4%capacity retention of its initial discharge capacity after 50 cycles.These results reveal that spray drying-roasting method is a promising approach to synthesize spherically shaped LiVPO_(4) F/C cathode material with stable crystal structure and excellent performance.
