Optimize an effective triboelectric nanogenerator surface morphology to harvest the human wrist pulse pressure: A numerical study on finite element method

This paper presents the optimized surface morphology to enhance transferred charge between the mental and dielectric of the modelled triboelectric nanogenerator. The structured shape of the dielectric layer is a vital factor in enhancing the output performance of the triboelectric nanogenerator. In this study, flat, cone, circular and rectangular shapes are structured on the dielectric surface of TENG. Its output performance is examined by conducting a numerical study on the finite element method in COMSOL Multiphysics software. Among the above stated structured surface TENGs, the structured rectangular surface triboelectric nanogenerator produces an improved output open-circuit voltage of 26 V for an externally given 3K Pascal pulse pressure as input. Hence, the result indicates that the structured surface TENGs can make a portable self-powered healthcare device such as heart rate, respiratory rate, and blood pressure measurement.