Fig. 5
From: Metal Electrode Polarization in Triboelectric Nanogenerator Probed by Surface Charge Neutralization
a Schematic diagrams of two different charge models of single TENG and double TENG structures. b Output voltage varies according to charge balancing conditions, but the ratio between the two balancing conditions is almost the same regardless of the varying output voltage. c Summary of the ratios in b. Contact/separate ratio of open-circuit voltage and short-circuit current under d different humidity conditions and e with extended operation time