State Key Laboratory of Silicate Materials for Architectures , Wuhan University of Technology , Wuhan 430070 , China.
Division of Advanced Materials Engineering , Chonbuk National University , Jeonju , Jeollabuk-do 54896 , Republic of Korea.
ACS Appl Mater Interfaces. 2018 Oct 17;10(41):35539-35546. doi: 10.1021/acsami.8b13261. Epub 2018 Oct 8.
The elastic composite-based piezoelectric energy-harvesting technology is highly desired to enable a wide range of device applications, including self-powered wearable electronics, robotic skins, and biomedical devices. Recently developed piezoelectric composites are based on inorganic piezoelectric fillers and polymeric soft matrix to take advantages of both components. However, there are still limitations such as weak stress transfer to piezoelectric elements and poor dispersion of fillers in matrix. In this report, a highly enhanced piezocomposite energy harvester (PCEH) is developed using a three-dimensional electroceramic skeleton by mimicking and reproducing the sea porifera architecture. This new mechanically reinforced PCEH is demonstrated to resolve the problems of previous reported conventional piezocomposites and in turn induces stronger piezoelectric energy-harvesting responses. The generated voltage, current density, and instantaneous power density of the biomimetic PCEH device reach up to ∼16 times higher power output than that of conventional randomly dispersed particle-based PCEH. This work broadens further developments of the high-output elastic piezocomposite energy harvesting and sensor application with biomimetic architecture.
基于弹性复合材料的压电能量收集技术是高度需要的，以实现广泛的设备应用，包括自供电可穿戴电子产品、机器人皮肤和生物医学设备。最近开发的压电复合材料基于无机压电填料和聚合物软基体，以利用这两种成分的优势。然而，仍然存在一些限制，例如向压电元件的弱应力传递和填料在基体中的差分散。在本报告中，通过模拟和复制海洋多孔动物的结构，使用三维电陶瓷骨架开发了一种高度增强的压电器件能量收集器（PCEH）。这种新的机械增强的 PCEH 被证明可以解决以前报道的传统压电器件的问题，并产生更强的压电能量收集响应。仿生 PCEH 器件的产生电压、电流密度和瞬时功率密度比传统的基于随机分散颗粒的 PCEH 高出约 16 倍。这项工作进一步拓宽了具有仿生结构的高输出弹性压电器件能量收集和传感器应用的发展。
