Lithium‐Aluminum Electrodes at Ambient Temperatures

Investigations were conducted to study the effect of composition on the electrode potential of the lithium‐aluminum alloy system and the diffusivity of lithium in at ambient temperatures. The electrode potentials of pyrometallurgically formed and electrochemically formed Li‐Al alloys were determined in the in 1,3‐dioxolane electrolyte. The various single phase and multiphase regions in terms of the alloy composition were delineated from the electrode potential characteristics and the results agree well with those obtained at elevated temperatures. The behavior of the potential change on electrodeposition of lithium on aluminum or lithium‐aluminum suggests slow diffusion rates of lithium in the lithium‐aluminum alloy system at ambient temperatures. Both potentiostatic and galvanostatic techniques were used to determine the diffusivity of lithium in . A value of was found to be the chemical diffusivity of Li in at .