Figure 1.

(a) Illustration of paper type SCs with a traditional “sandwich” structure and a new “in-plane” structure. Diagram exhibiting the ion transfer associated with the operation of both types of supercapacitors (SCs). Adapted with permission from [17]. Copyright (2015), The Royal Society of Chemistry 2015. (b) Process flow for producing transparent, super-bendable supercapacitor without percolation. (c) Schematic of a transparent, ultra-bendable supercapacitor with alternating patterned electrodes. Adapted with permission from [17]. Copyright (2013), The Royal Society of Chemistry 2013. (d) Manufacturing of inkjet-printed SCs with different fabrication factors. Schematic diagram of the stepwise manufacturing procedure of an inkjet-printed SC. (e) Cyclic voltammetry (CV) profiles at various scan rates (1–200 mV/s). (f) Cycling performance of inkjet-printed SC at a constant charging-discharging current density (0.2 mA/cm²). (g) CV tests of inkjet-printed SC (scan rate of 1.0 mV/s) after repetitive folding deformation (folding radius from 2.5 mm to 1000 cycles) [22]. Copyright (2016), The Royal Society of Chemistry 2016. (h) SEM image of activated carbon fiber cloth (ACFC). (i) ACFC based textiles are bent with a plastic tube of diameter 8.5 mm. Adapted with permission from [31]. Copyright (2015), WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.