Wieder, F.; Kallfaß, Ch.; Manke, I.; Hilger, A.; Tötzke, C.; Hoch, C.; Schier, H.; Graf, K.; Banhart, J.: Electrolyte distribution and discharge time – a combined study of X-ray tomography and electrical measurements of a commercially available lithium-ion capacitor. ECS Transactions 53 (2013), p. 211-218
10.1149/05330.0211ecst

Abstract:
A lithium-ion capacitor (LIC) was studied during an extensive charge/discharge procedure. Changes in the interior threedimensional structure were investigated by means of X-ray tomography during electrical cycling of the LIC. With increasing number of cycles we found electrolyte accumulating at the bottom of the capacitor. A clear correlation between electrolyte distribution at the bottom and performance of the LIC was determined.