Pg. Bruce et al., 2-ELECTRODE AND 3-ELECTRODE STUDIES OF CYCLING IN EXPERIMENTAL POLYMER ELECTROLYTE CELLS, Journal of power sources, 44(1-3), 1993, pp. 461-465
Polymer electrolyte cells have been cycled at different rates and, in
some instances, a constant potential has been maintained for an extend
ed period between cycles. These experiments indicate that much of the
capacity lost on cycling may be recovered, however, the slow decline i
n capacity with increasing cycle number appears to be unrecoverable. T
he latter loss of capacity is probably associated with degradation wit
hin the composite cathode. By inserting a third, reference, electrode
into the cell the performance of the lithium anode and composite catho
de have been measured. These measurements confirm that at low current
densities the loss of capacity is associated principally with the cath
ode.