Fig 9. Mean change in 2-cell circuit model parameters with time.
(a) Rct−charge transfer resistance, (b) Cdl−double layer capacitance, (c) Rs−electrolytic resistance, and (d) Rint and Cint−charge transfer parameters at the intermediate layer between SS and EGaIn in the SS-EGaIn electrodes. Changes in the parameter values reflect the trends observed in the EIS plots. Rct changed for all electrodes except for EGaIn whose Cdl decreased by about five times over the period of two weeks. The Cdl of SS stayed fairly constant, while that of AuP changed, but remained considerably high. Parameters of the SS-EGaIn electrodes were found to gradually become similar to the initial parameters of the SS electrodes.