Piezoelectric-driven Charging Supercapacitors for Biomedical Sensor Applications
J. Environ. Nanotechnol., Volume 8, No 4 (2019) pp. 26-32
Abstract
Piezoelectric materials can be fabricated as a generator to convert mechanical energy emitted by ambient vibrations into electrical energy that may be stored and utilized to power some ultra-low-power devices such as radio frequency identification (RFID) tags. Since most of the ultra-low-power devices are wireless, it becomes essential to have their independent power supplies. In tradition, the power supplies come from bulky lead-acid and lithium batteries, which have environment-unfriendly chemical ingredients. Most importantly, the lead-acid and lithium batteries have a limited life of 500-1000 cycles compared to millions or more for most commercially available carbon-based supercapacitors. With the introduction of many portable electronic device and health monitor device using piezo-based energy harvesting has become one of the fascinating subjects of interest to provide portable electrical power.
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