Fig. 2

Working principle and stretchability of bionic stretchable nanogenerator. a Photographs of one working cycle of bionic stretchable nanogenerator (BSNG) (red ink filled in). b Schematic diagram of the working process of BSNG. c Schematic diagram of the working mechanism of BSNG. d Simulation result of BSNG under 50% strain. e BSNG (indicated by red frame) at initial state (0% strain) and stretched state (60% strain). f Uniaxial tensile test of the silicone, polydimethylsiloxane (PDMS), silicone-PDMS and BSNG