Screen-printed piezoelectric shoe-insole energy harvester using an improved flexible PZT-polymer composites

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Almusallam, A.^1 ; Torah, R.N.^1 ; Zhu, D.^1 ; Tudor, M.J.^1 ; Beeby, S.P.^1

Electronics and Electrical Engineering Group, University of Southampton, SO17 1BJ, United Kingdom^1

关键词: Alumina substrates;    Energy Harvester;    Flexible substrate;    Lower temperatures;    Piezoelectric composite;    Piezoelectric property;    Polymer composite;    Simulated results;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012108/pdf
DOI  :  10.1088/1742-6596/476/1/012108

来源: IOP

【 摘 要 】

This paper reports improved screen-printed piezoelectric composites that can be printed on fabrics or flexible substrates. The materials are flexible and are processed at lower temperature (130°C). One main PZT particle size (2μm) was mixed separately with smaller piezoelectric particles (0.1, 0.3 and 0.8μm) with different weight ratios to investigate the piezoelectric property d33. The blended PZT powder was then mixed with 40% polymer binder and printed on Alumina substrates. The applied poling field, temperature and time were 8MV/m, 160°C and 10min, respectively. The optimum material gives a d33of 36pC/N with particle sizes of 2μm and 0.8μm and mixed percentages of 82% and 18%, respectively. A screen-printed piezoelectric shoe-insoles (PSI) has been developed as a self-powered force mapping sensor. The PSI was simulated, fabricated and tested. ANSYS results show that one element of PSI sole can produce an open- circuit voltage of 3V when a human of average weight of 70kg makes a gait strike. Experimental results show that one element produced 2V which is less than the simulated results because of the reduction of poling field for the practical device.