Analysis of energy harvesting based on hysteresis property of ferroelectric material

CHEN Shuang-lin， FENG Chang-shui
（School of Mechanical Engineering， Hangzhou Dianzi University， Hangzhou 310018， China）

Abstract： In order to solve the problems of power supply to micro-electro-mechanical systems（MEMS），the research of energy harvesting based on the vibration of electromechanical coupling material was investigated. After the analysis of existing energy harvesting based on the piezoelectric material，power generation mechanism of piezoelectric material，the advantages and the better electromechanical coupling character for spontaneous polarization were introduced. A method was presented to harvest energy based on ferroelectric material. The experiment of energy harvesting was conducted respectively on piezoelectric and ferroelectric material. The testing results indicate that the ferroelectric and piezoelectric structures both can meet the demand of electricity supply. The experimental results show that the supply efficiency of ferroelectric structure is better than that of piezoelectric structure.
Key words： electromechanical coupling；ferroelectric material；piezoelectric material；energy harvesting；micro-electro-mechanical systems（MEMS）