压电
材料科学
能量收集
电压
极化
灵敏度(控制系统)
功率密度
功率(物理)
光电子学
实现(概率)
声学
电气工程
电子工程
复合材料
电介质
铁电性
量子力学
统计
物理
工程类
数学
作者
Songhan Shi,Yizan Zhai,Shujun Zhang,Hao Wang,Zhicheng Li,Xu Fan,Yangyang Zhang,Jinjun Liu,Peng Li,Jiwei Zhai,Zhongbin Pan
出处
期刊:Nano Energy
[Elsevier]
日期:2022-08-01
卷期号:99: 107422-107422
被引量:22
标识
DOI:10.1016/j.nanoen.2022.107422
摘要
Realization of self-powered sensing devices has received substantial attention employing flexible piezoelectric energy harvesters (PEH). For effective implement, robust sensing and response capability to external mechanical load are demanded for PEH, which has been challenging. Here, flexible and ultra-sensitive PEH filled with pine-branch-inspired three-dimensional TiO2@[email protected] (3D TPA) fillers are proposed. Benefitting from the bioinspired structure design, the PEH device with incredible piezoelectric characteristics combining measurable output voltage and power density ( ~ 100 V and ~ 184.06 μW cm−2) contributes to reliable power source supply for sustainably drive electronic devices. Notably, the PEH device could be considered as piezoelectric sensors with ultra-sensitive sensing performances comprising high sensitivity (46.2 V N−1 and 6.64 μA N−1), low detection threshold (10 mg) and fast response time (1 ms) for detecting dropped tiny objects. The extraordinary piezoelectric outputs enhancement is put down to the multiple coupling induced by the 3D TPA, including improvement of load-transfer efficiency and poling electric field, which has been confirmed by experiment results and theoretical simulations. This work opens a novel insight to access 3D fillers and has a profound influence on the rational preparation of ultra-sensitive PEH for potential application in smart piezoelectric sensors.
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