EN06.04.05 : The Studies of Lattice Parameter and Electrochemical Behavior for Li3V2(PO4)3/C Cathode Materials

5:00 PM–7:00 PM Apr 3, 2018 (America - Denver)

PCC North, 300 Level, Exhibit Hall C-E

Seung-Woo Choi1 Min-Young Kim1 Da-Hye Kim1 Seung-Hoon Yang1 HaYoung Jung1 Hye-Min Ryu1 Sang-Jun Park1 Ho-Sung Kim1

1, Korea Institute of Industrial Technology, Gwangju, , Korea (the Republic of)

Single-phase, nano-sized Li3V2(PO4)3/C materials with the monoclinic structure were prepared by a modified sol-gel method, in which the precursor materials were sintered at 750, 800, 850 and 900 °C, respectively. The X-ray diffraction(XRD) patterns of all the materials were consistent with the monoclinic structure without any impurities. The LVP/C composite sintered at 800 °C was selected as the most promising material on the basis of the lattice parameters (a = 8.605 Å, b = 8.596 Å, c = 14.732 Å, b = 125.20 °, V = 890.59 Å3), crystallite size (99 nm), and morphology (5−6 nm carbon layer). The LVP/C composite sintered at 800 °C showed a high specific capacity with excellent kinetic properties (capacity of 130 and 170 mAh*g-1 at voltages of 3.0-4.3 and 4.8 V at 0.1 C, 25 °C ), which showed about 98%, 86% of its theoretical capacity, respectively.