%0 Journal Article
%T Flexible Ferroelectret Polymer for Self-Powering Devices and Energy Storage Systems
%J -
%D 2019
%R https://doi.org/10.1021/acsami.9b02233
%X Applying flexible materials for energy scavenging from ambient mechanical vibrations is a clean energy solution that can help alleviate electrical power demands in portable devices and wearable electronics. This work presents fundamental studies on a flexible ferroelectret polymer with a strong piezoelectric effect and its interface with self-powered and energy storage systems. A single-layered device with a thickness of 80 ¦Ìm was used for characterizing the device¡¯s output voltage, current, transferred charge, and energy conversion efficiency. The potential capability of harvesting mechanical energy and delivering to system load is demonstrated by integrating the device into a fully integrated power management system. The theory for determining the harvested energy that is ultimately delivered to external electronic loads (or stored in a battery) is discussed. The maximum power delivery is found to be for a 600 M¦¸ load, which results in a device power density of 14.0 W/m3 for input mechanical forces with a frequency around 2 Hz
%U https://pubs.acs.org/doi/10.1021/acsami.9b02233