Fig. 3
From: Triboelectric nanogenerators as flexible power sources
a Structure of the paper-based TENG. b Dependence of voltage and current output for different loading resistances. c Relationship between output power and external loading resistance. Reproduced with permission.29 Copyright 2015 American Chemical Society. d Schematic of the fiber-based TENG. Output voltages of the PVDF nanogenerator as a function of strain rate with a maximum strain of about 0.05%. e Dependence of output current on the number of coils. f Dependence of output current on strains. Reproduced with permission.30 Copyright 2016 Wiley-VCH
