Fig. 2 shows the CV curves at different temperatures ranging
from 10 to 30 C. Peaks corresponding to two redox couples were
observed. The peaks in the high potential zone (0.9~1.1 V) belong to
the VO2
þ/VO2þ couple and those in the lower potential zone
(0.9 ~ 0.4 V) belonged to the V3þ/V2þ couple; which correspond
to the reactions at the positive and negative electrode, respectively.
T