Analysis of Signals and Energy Storage in HAp-Collagen-Glucose Piezoelectric Samples Containing an Electrolyte

When a piezoelectric material is subjected to compressive stress, electric charges are induced on the surface producing an electric field Ee and a voltage. When there are free charges (electrolyte), these move towards charged surfaces forming the electric double layer (EDL), producing a field Ei in opposite direction and which reduces the output voltage. The EDL can store large amounts of energy. A model is presented that allows to predict the shape of the output profiles. Numerical values of various parameters were estimated to support these results.