Abstract
Piezoelectric energy harvesting has attracted wide attention to fulfill day-byday increasing energy demand. Owing to its benefits, which include scalability, high
power density, and simple architecture, piezoelectric ceramics have become the first
choice of researchers over their counterparts such as electromagnetic and electrostatic
energy harvesters. Despite extensive research and widespread use of lead-based
piezoelectric ceramics, removing lead from these applications for environmental
concerns is still difficult. Modern lead-free piezoelectric energy harvesting technology
is reviewed in this chapter. Fundamental piezoelectric concepts and several
piezoelectric material qualities are presented in a succinct theory part. A literature
review on the advancement of lead-free piezoelectric ceramics, specifically KNN, BT,
and BNT-based ceramics, since 2010 is presented. Applications for energy harvesting
have also been described and assessed. Finally, based on their current developments,
different challenges and future perspectives are also encompassed.