Construction of Flexible Piezoceramic Array with Ultrahigh Piezoelectricity via a Hierarchical Design Strategy

Author:

Xu Qianqian1,Wang Zhenxing2345,Zhong Junwen6,Yan Minyang1,Zhao Senfeng7,Gong Jiangshan2345,Feng Kaiyu1,Zhang Jianxun1,Zhou Kechao1,Xie Jianbin8,Xie Hui2345,Zhang Dou1,Zhang Yan1ORCID,Bowen Chris9

Affiliation:

1. State Key Laboratory of Powder Metallurgy Central South University Changsha Hunan 410083 China

2. Hunan Key Laboratory of Angmedicine Changsha Hunan 410008 China

3. Angmedicine Research Center of Central South University Changsha Hunan 410008 China

4. Department of Orthopedics Movement System Injury and Repair Research Center Xiangya Hospital Central South University Changsha Hunan 410008 China

5. National Clinical Research Center for Geriatric Disorders Xiangya Hospital Central South University Changsha Hunan 410008 China

6. Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics University of Macau Macau SAR 999078 China

7. Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science College of Chemistry and Chemical Engineering Central South University Changsha Hunan 410083 China

8. ZhongKe Help Innovation Academy of Intelligence Science and Technology Changsha Hunan 410083 China

9. Department of Mechanical Engineering University of Bath Bath BA2 7AY UK

Abstract

AbstractThe µW‐level power density of flexible piezoelectric energy harvesters (FPEHs) restricts their potential in applications related to high‐power multifunctional wearable devices. To overcome this challenge, a hierarchical design strategy is proposed by forming porous piezoceramics with an optimum microstructure into an ordered macroscopic array structure to enable the construction of high performance FPEHs. The porous piezoceramic elements allows optimization of the sensing and harvesting Figure of merit, and the array structure causes a high level of effective strain under a mechanical load. The introduction of a network of polymer channels between the piezoceramic array also provides increased device flexibility, thereby allowing the device to attach and conform to the curved contours of the human body. The unique hierarchical piezoceramic array architecture exhibits superior flexibility, a high open circuit voltage (618 V), high short circuit current (188 µA), and ultrahigh power density (19.1 mW cm−2). This energy density value surpasses previously reported high‐performance FPEHs. The ultrahigh power flexible harvesting can charge a 0.1 F supercapacitor at 2.5 Hz to power high‐power electronic devices. Finally, the FPEH is employed in two novel applications related to fracture healing monitoring and self‐powered wireless position tracking in extreme environments.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

State Key Laboratory of Powder Metallurgy

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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