Electric storage in de-alloyed Si-Al alloy ribbons

The capacitance of de-alloyed ... alloy ribbons with resistivities of 1-1000 Omega cm was measured as a function of frequency between 1mHz and 1MHz from electric charge/discharge pulse curves of 10V applied at 100 ms-25 ns intervals, respectively, using an exponential transient analysis for electric charging/discharging. The capacitance of the dealloyed Si-20 at.% Al specimen obtained by prompt charging/discharging decreased logarithmically from 102 mu F to 1.2pF as frequency increased from 1mHz to 1 MHz. From the observed electrode distance dependence on capacitance and nonlinear electronic transport behaviour, the authors deduced that the alloy consisted in a distributed constant equivalent circuit series with 1.7% parallel, analogous to electric double-layer capacitors. (ProQuest: ... denotes formulae/symbols omitted.)