Electrochimica Acta, Vol.53, No.5, 2232-2237, 2008
Rheological phase reaction synthesis and electrochemical performance of Li3V2(PO4)(3)/carbon cathode for lithium ion batteries
Monoclinic lithium vanadium phosphate/carbon (Li3V2(PO4)(3)/C) cathode has been synthesized for applications in lithium ion batteries, via a rheological phase reaction (RPR) method. The sample is characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). This material exhibits high initial discharge capacity of 189 and 177 mAh g(-1) at 0.1 and 0.2 C between 3.0 and 4.8 V, respectively. Moreover, it displays good fast rate performance, which discharge capacities of 140, 133, 129 and 124 mAh g I can be delivered after 100 cycles between 3.0 and 4.8 V vs. Li at a different rate of 0.5, 1, 2 and 5 C, respectively. The electrochemical impedance spectroscopy (EIS) is also investigated. (C) 2007 Elsevier Ltd. All rights reserved.
Keywords:lithium vanadium phosphate/carbon;high capacity;fast rate;lithium ion batteries;rheological phase reaction