Performance enhancement of nanogenerator achieved in branch-heterostructure piezoelectric ceramic fiber toward electrical transmission power line monitoring

作者：Haowei Lu, Zhenghua Hu, Xin Wang, Gaoru Chen, Xiaogan Zheng, Jintao Xia, Ming‐Ju Huang, Wenlong Yang, Junhui Liu, Benlin Hu · 发表于：Journal of Advanced Ceramics · 年份：2025 · DOI：10.26599/jac.2025.9221171 · 被引用次数：5 · 研究领域：Advanced Fiber Optic Sensors、Advanced Sensor and Energy Harvesting Materials、Semiconductor Lasers and Optical Devices

Flexible composites-based piezoelectric nanogenerator (PENG) with low cost, stable properties and sensitivity to mechanical deformation is highly suitable to construct self-powered sensing layer for distributed electrical transmission power lines. However, the lower output performance of the PENG resulting from inadequate effective polarization, hinders its integration with energy management circuits and signal recognition systems. Herein, we propose a high-performance PENG by designing a new piezoelectric ceramic fiber, where BCZT@Ag nanoparticles are grown on the surface of BCZT fibers to form a branch-heterostructure, leading to enhanced charge transport mechanisms and induced polarization in the PENG. The branch-heterostructure ceramic fibers-based PENG exhibits significantly enhanced outputs of 96.4 V and 15.52 µA, which are about 3.2 and 6.5 times higher than those of PENG without specific design. Moreover, an intelligent Power Internet of Things (Power IoTs) system through the synergistic integration of this high-performance PENG and learning-assisted data analytics has been constructed, which enables accurate self-powered real-time monitoring of abnormal vibration states in transmission power lines to prevent rupture-related failures with approximately 96% identification accuracy. This work not only provides an effective strategy to enhance the performance of PENG, but also broadens the application prospects of lead-free piezoelectric ceramics in Power IoTs.