The implanted sides of the cleaned samples were then coated with a molten LiSn alloy, containing 20 wt% of Sn. The impedance of the coated samples was measured with a Solartron Modulab XM at 25±1 °C with a perturbation voltage of 10 mV from 1 MHz to 10 Hz, 19 datapoints per decade of frequency after a 1 min OCV period.