The first question we asked was "Is the MSC design shown in Fig. 1b scalable?" And our initial response was “unlikely” because the driving force for ion movement between the positive and negative carbon electrodes is limited to the relatively weak fringe electric field (shown as the yellow dash lines in Fig. 1b) which cannot effectively drive the ion movement through the entire thickness of the carbon electrode (t2) as it increases into the micron range.
In order to overcome the lack of driving force for facile ion movement, we came up with several new designs in a recent patent application . One of them is shown in Fig. 2 as an example, wherein the current collectors are coated on the sidewalls of the carbon electrodes and gives raise to the direct electric field, as indicated by the purple arrow. In this presentation we will discuss other planar designs, their corresponding pack designs, as well as low cost fabrication methods involving printing processes.
1. (a) D. Pech et al., Nature Nanotech. 2010, 5, 651; (b) W. Gao et al. ibid., 2011, 6, 496; (c) M. F. El-Kady et al., Science, 2012, 335, 1326; (d) M. F. El-Kady; R. B. Kaner, Nature Comm. 2013, 4, 1475; (e) Z.-S. Wu et al., ibid., 2013, 4, 2487; (f) T. Lin et al., Science, 2015, 350, 1508.