Fig. 4: The structural and electrical properties of the rotary disc-shaped TENG.
From: Self-powered temperature-changing system driven by wind energy

a Exploded view of the rotary disc-shaped TENG. b Side view of rotary disc-shaped TENG. c Transferred charge. d Peak-to-peak voltage. e Trend of the output versus rotation speed in the TENG. f Trend of the power versus the external load resistance