The Formation of Lithium‐Aluminum Alloys at an Aluminum Electrode in Propylene Carbonate

The formation of lithium‐aluminum alloys at pure aluminum has been studied by potentiostatic, a‐c impedance, and galvanostatic techniques. It is concluded that is formed under most circumstances, some degree of nonstoichiometry being evident from the polarization curves. Values of the exchange current, transfer coefficient, and heat of activation for the process are reported. The diffusion coefficient for Li in was also determined in the temperature range 0°‐40°C. Cycling efficiencies of the alloy electrode with respect to both lithium and aluminum were also investigated.