V6O13 As cathode material for lithium cells

The e.m.f. vs. composition relationship of Li/LixV6O13 has been studied at 25 °C and 155 °C by cyclic voltammetry using organic and polymeric electrolytes, respectively. At both temperatures the lithium insertion reaction is found to be reversible in the composition interval: 0 ⩽, x ⩽ 8. a.c.- impedance measurements on single crystals (25 °C) show that Li+ diffusion in LixV6O13 is one dimensional and proceeds along the channels in the b axis direction. Cycling of Li/LixV6O13 cells with organic and polymer electrolyte shows that high materials utilization and good cycling performance can be achieved with both systems. It is demonstrated that LixV6O13 is sensitive to discharge below 1 V vs. Li.