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. 2020 Jun 8;11:2868. doi: 10.1038/s41467-020-16642-6

Fig. 1. Structural design and performance analysis of the PDMS-coated energy yarn.

Fig. 1

a Schematic illustration of the multiaxial yarn winding machine. The enlarged photograph in its top left is the tightening sleeve. b Photograph of a bobbin wrapped with a continuous multiaxial winding yarn. c Surface morphology SEM image of a ten-axial winding yarn (scale bar: 200 μm). d Structural diagram of the ten-axial winding yarn. The purpose of different color design is to facilitate the observation of distribution and moving trend of a single yarn in the multiaxial winding yarn. e Cross-sectional SEM image of the PDMS-coated energy yarn (scale bar: 1 mm). f Effect of the number of winding yarns on electrical output performance of the PDMS-coated energy yarn. g Photograph of the PDMS-coated energy yarns with different diameters (scale bar: 10 mm). h Diameter-dependent electrical output performance of the PDMS-coated energy yarn. i Dependence of current density and power density of the PDMS-coated energy yarn with 2 mm diameter and 8 axial winding yarn on the external resistances under the tapping frequency of 3 Hz. The error bar indicates the range within a standard deviation. Source data are provided as a Source Data file.