Anomalous Behavior During Low Rate Discharge of Li/CFX Cells

Lithium-carbon monofluoride (Li/CF x ) D-sized battery cells discharged at very low rates (C/1800) were found to deliver inconsistent capacities. These effects be absent as the discharge rate was increased C/600. Destructive physical analysis of C/1800 confirmed corrosion, manifesting preferential utilization Li anode around copper current collector, discoloration remaining excess Li, and more crucially loss adhesion resulting in a premature completion discharge. This anomalous behavior may attributed competing corrosion reaction during discharge, whereby + is lost electrolyte that similar current-producing charge transfer process. At higher rates, this process masked by significant generated full cell, which occurs much rate. The capacity delivery relate uneven breakdown surface film these where density low. Experimental data from both three-electrode describing effect are presented, well possible remedies for desired.