Porous flexible molecular-based piezoelectric composite achieves milliwatt output power density

Jia-Qi Luo, Hai-Feng Lu (), Yi-Jing Nie, Yu-Hang Zhou, Chang-Feng Wang, Zhi-Xu Zhang, Da-Wei Fu () and Yi Zhang ()
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Jia-Qi Luo: Zhejiang Normal University
Hai-Feng Lu: Zhejiang Normal University
Yi-Jing Nie: Jiangsu University
Yu-Hang Zhou: Jiangsu University
Chang-Feng Wang: Zhejiang Normal University
Zhi-Xu Zhang: Zhejiang Normal University
Da-Wei Fu: Zhejiang Normal University
Yi Zhang: Zhejiang Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Molecular ferroelectrics have made breakthrough progress in intrinsic piezoelectric response that can be on par with advanced inorganic piezoelectric ceramics. However, their successful applications in high-density energy harvesting and self-powered flexible devices have been great challenge, owing to the low elastic moduli, intrinsically brittle, and fracture proneness of such material systems under mechanical loading. Here, we have developed a flexible porous composite piezoelectric material by using soft thermoplastic polyurethane (TPU) and molecular ferroelectric materials. Benefiting from the porous structure of TPU, the flexible piezoelectric composites enable effectively large doping ratio (50%) of [Me3NCH2Cl]CdCl3 (TMCM-CdCl3) and highly efficient stress absorption, coupled with the excellent piezoelectric properties of TMCM-CdCl3, to realize a superior power density (636.9 µW cm−2 or 1273.9 µW cm−3). This output is 2000 times higher than that of flexible piezoelectric materials represented by poly(vinylidene fluoride) (PVDF). We believe that the outstanding performance of the porous composite piezoelectric material would pave a feasible way for real industrial applications of molecular ferroelectrics.

Date: 2024
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DOI: 10.1038/s41467-024-53031-9

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