In our recently published paper [M. Tjelta and S. Sunde, J. Electroanal. Chem. 737 (2015) 65-77] we inferred the valid frequency range for our impedance model through comparison of data for different truncations of the series solution. To avoid undue focus on the data beyond the stated range of validity in one of our figures and recurring misinterpretation of it, we reproduce it in this comment with data beyond the upper frequency limit of the validity range removed. (C) 2016 Elsevier B.V. All rights reserved.