Giant Piezoelectric Output and Stability Enhancement in Piezopolymer Composites with Liquid Metal Nanofillers (Adv. Sci. 36/2023)
Jingyan Liu, Shi Zeng, Mingrui Zhang, Juan Xiong, Haoshuang Gu, Zhao Wang, Yongming Hu, Xianghui Zhang, Yi Du, Long Ren
Abstract
Piezoelectric Composites In article number 2304096, Juan Xiong, Long Ren, and co-workers provide a novel strategy of establishing liquid-solid interfaces to significantly improve the output performance and reliability of polymer-based piezoelectric materials. Such liquid-solid interfaces are formed by filling Ga-based liquid metal (LM) nanodroplets into the poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE). It is revealed that the dielectric oxide layer of conductive LM nanodroplets regulate the piezoelectric output, and the soft character of LM nanofillers contribute to the structure stability during shape-changing, which paves the way towards the high performance piezoelectric composite-based devices.