Flexible Ferroelectret Polymer for Self-Powering Devices and Energy Storage Systems
Flexible Ferroelectret Polymer for Self-Powering Devices and Energy Storage Systems
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DOI：
10.1021/acsami.9b02233
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发表时间：
2019-05-15
影响因子：
9.5
通讯作者：
Sepulveda, Nelson
中科院分区：
文献类型：
--
作者：
Cao, Yunqi;Figueroa, Jose;Sepulveda, Nelson
应用柔性材料从环境机械振动中获取能量是一种清洁能源解决方案，可以帮助减轻便携式设备和可穿戴电子产品的电力需求。本文介绍了一种具有强压电效应的柔性铁驻极体聚合物及其与自供电和储能系统的界面的基础研究。采用厚度为80 μ m的单层器件，对器件的输出电压、电流、转移电荷和能量转换效率进行表征。通过将该设备集成到一个完全集成的电源管理系统中，证明了收集机械能并将其传递给系统负载的潜在能力。讨论了确定最终传递给外部电子负载（或存储在电池中）的收集能量的理论。最大功率输出被发现为600 M ω负载，这导致设备功率密度为14.0 W/ M(3)的输入机械力，频率约为2hz。
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 mu m 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 Omega load, which results in a device power density of 14.0 W/m(3) for input mechanical forces with a frequency around 2 Hz.