Simultaneous Spatial and Temporal Measurements of the Current Distribution in a Miniature Hull Cell

TitleSimultaneous Spatial and Temporal Measurements of the Current Distribution in a Miniature Hull Cell
Publication TypeJournal Article
Year of Publication2016
AuthorsChmielowiec, B, Cai, T, Allanore, A
JournalJournal of the Electrochemical Society
Volume163
Issue5
PaginationE142 - E146
Date Published2016///
ISBN Number0013-4651
Keywordschronoamperometry, diffusion, electrolytic current, porous-electrodes, resistance, simulation, surface, transient natural-convection
Abstract

Experimental validation of the current distribution for actual cell geometries is an important complement to modeling. In this work, the combination of a segmented electrode in a miniaturized Hull Cell with a synchronous monitoring of the current response in each segment is proposed as a novel experimental set-up. The high frequency monitoring of the current response to potential steps is investigated as a mean to access the temporal and spatial evolution of current distribution. The corresponding primary current distribution was measured using a ferricyanide/ferrocyanide alkaline electrolyte, confirming the prediction from Laplace's equation. In addition, the experimental set-up allowed the identification of the transition time from primary to tertiary current distribution regimes. (C) The Author(s) 2016. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. All rights reserved.

Short TitleJ. Electrochem. Soc.