Title :
Segmented Electrodes for Piezoelectric Energy Harvesters
Author :
Kodali, Prakash ; Krishna, A. ; Varun, Roop ; Prasad, M. ; Sambandan, Sanjiv
Author_Institution :
Dept. of Instrum. & Appl. Phys., Indian Inst. of Sci., Bangalore, India
Abstract :
This letter studies the impact of electrode segmentation on energy harvesting with piezoelectrics. For cases where the load can be distributed, it is concluded that segmentation of electrodes helps to improve energy content by minimizing surface currents. Using a ribbon of polyvinylidene fluoride under tension as an example, we show that using a six segmented electrode improves energy content by a factor of 2.5. Power delivery remains almost constant except for an anomalous increase when the number of segments is made large. Models are developed to predict improvements in energy content and power delivery.
Keywords :
electrodes; energy harvesting; piezoelectric transducers; polymers; electrode segmentation; energy content; piezoelectric energy harvesters; power delivery; Electrodes; Energy harvesting; Image segmentation; Optimization; Stress; Vibrations; Voltage measurement; Piezoelectric; energy harvesting; poly-vinylidene fluoride; polymers;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2014.2305447