Low Cost, Large Area, Flexible Graphene Nanocomposite Films for Energy Harvesting Applications

Abstract

In this paper, we report a robust and a low-cost spin coating approach for fabrication of large area flexible piezoelectric nanocomposite generator device for harvesting biomechanical motions. In order to develop the piezoelectric nanocomposite, ZnO and BaTiO 3 were used as filler materials for realization of piezoelectric nanogenerator. Serial stretching and bending tests over these devices illustrated generation of maximum open-circuit voltage of ∼237 and ∼736 mV for ZnO and BaTiO 3 , respectively. Furthermore, we also demonstrated a 2 × enhancement in output voltage performance of nanogenerator by adding graphene platelets to these diphasic piezoelectric nanocomposite systems.