Conventional energy storage devices often need to be replaced or wired for charging due to their limited capacity, which is difficult to meet the working demands of wearable electronic devices in some special occasions. Using the "piezoelectric effect" of piezoelectric materials to construct a piezoelectric self-chargeable energy storage device based on the conversion of force to electricity is an effective solution to the problem s above. Recent development on the piezoelectric and self-chargeable energy storage devices was reviewed. In addition, the design principle, characteristics, construction base and applications were also introduced.

wearable electronics  /  energy storage devices  /  piezoelectric  /  self-chargeable