Figure 4.

The effect of geometric dimensions, ambient conditions and ionic concentration on the LS‐TENG output performance. Variation of V _oc and I _sc with a) different sheet width (height: 70 mm, thickness: 0.7 mm), b) different thickness (height: 70 mm, width: 40 mm), c) different height between two electrodes (width: 40 mm, thickness: 0.7 mm), d) different relative humidity (20.0 °C, no wind), e) different temperature (55.0%, no wind), f) different wind velocity (55.0%, 20.0 °C), g) HCl, h) NaOH solutions of different pH value, and i) NaCl solution of different concentration. The tests in panels (g)–(i) were conducted under room condition of relative humidity ≈55.0%, temperature ≈20.0 °C, and wind velocity ≈0 m s^–1. These tests in panels (d)–(i) were all carried out with the same sized LS‐TENG of 70 × 40 × 0.7 mm³.