Fig. 5. Output performance characterization of the W-TENG versus different excitation accelerations.
a Voltage waveforms with different excitation accelerations ranging from 9.8 to 98 m/s2 under a load resistance of 30 MΩ; b voltage amplitude variation with acceleration under a load resistance of 30 MΩ; c output power for different excitation accelerations ranging from 9.8 to 98m/s2 versus load resistance ranging from 3 to 105 MΩ; d enlarged view of open-circuit voltage waveforms at an acceleration of 9.8m/s2; e enlarged view of open-circuit voltage waveforms at an acceleration of 98m/s2; f output voltage and current variations with load resistance ranging from 3 to 105 MΩ at an acceleration of 58.8m/s2