Fig. 4
From: A universal standardized method for output capability assessment of nanogenerators

Breakdown for contact freestanding-triboelectric-layer nanogenerator. a Schematic diagram of CFT mode TENG. Average breakdown voltage b V1 and c V3 from experiment, compared with theoretical values calculated by Paschen’s law. Figure of visible spark insets in b. d Average capacitance Ctotal, compared with theoretical values calculated by the equation considering two-side edge effects. e Cycle for maximized energy output with the threshold breakdown curve compared with theoretical curve by Paschen’s law. QSC,max = 25 nC. Source data are provided as a Source Data file