Abstract
Advancement in self-powered portable and wearable electronics mostly depends on the realization of an efficient human activity-based energy harvester and electronic skin (e-skin)-mimicking tactile mechanosensing property of natural human skin. A human activity-based energy harvester can supply power to flexible, potable, electronics equipment associated with the human body, whereas a tactile e-skin mechanosensor can precisely detect static and dynamic pressure stimuli. Here, we report development of a NiO@SiO2/PVDF nanocomposite, a facile piezoelectric material possessing superior flexibility that is light in weight and has low cost, which is an excellent choice for the next generation mechanical energy harvester and tactile e-skin sensors. The fabricated piezoelectric nanogenerator (PNG) comprising nanocomposites shows very promising output under application of the biomechanical force on it. PNG15 exhibits high output voltage (53 V), adequate current density (∼0.3 μA/cm2), high power density (685 W/m3), ...
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