Fig. 2: Design and output performance of temperature difference TENG with controllable friction layer temperature (TDNG).
From: High performance temperature difference triboelectric nanogenerator

a Schematic diagram of TDNG. Insets are scanning electron microscope images of nanostructures on Kapton (scale bar: 500 nm) and Al (scale bar: 1 μm). b The open-circuit voltage of TDNG under different ∆T. c The short-circuit current of TDNG under different ∆T.