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. 2019 Apr 5;5(4):eaav6437. doi: 10.1126/sciadv.aav6437

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Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 2 — (A) Photographs of the stator and the slider (inset) of the sliding mode DC-TENG (W is the width of the FE and L is the length of CCE; scale bar, 3 cm). (B) Scanning electron microscopy (SEM) image of nanowires on the surface of PTFE. Scale bar, 1 μm. A larger surface curvature results in an ultrahigh electric field, which is easier to air breakdown. (C) Phenomenon of air discharge in this paper. Scale bar, 1 cm. (D) Short-circuit current, (E) transferred charges, and (F) open-circuit voltage of the sliding mode DC-TENG. (G) Short-circuit current, (H) transferred charges, and (I) open-circuit voltage of the sliding mode DC-TENG at different accelerations. (J) Short-circuit current and (K) open-circuit voltage of the sliding mode DC-TENG at different velocities.