Study on the Electrochemical Formation of Al‐Li Alloys in γ‐Butyrolactone Electrolytes

The electrochemical formation and properties of aluminum‐lithium alloys at pure aluminum have been studied in γ‐butyrolactone solutions with , , , and as electrolytes. is formed under most circumstances. A value of the rate formation of the alloy from the solution was . Cycling efficiency of this alloy electrode with respect to lithium was and remained unchanged even after 25 cycles. The alloy formation in the, , and solutions is followed by its passivation leading to a significant drop of the cycling efficiency.