Mitigating the Negative Piezoelectricity in Organic/Inorganic Hybrid Materials for High-performance Piezoelectric Nanogenerators

Huiling Guo, Liang Li, Fang Wang, Sang Woo Kim, Huajun Sun

Research output: Contribution to journalArticlepeer-review


The conversion of ecofriendly waste energy into useable electrical energy is of significant interest for energy harvesting technologies. Piezoelectric nanogenerators based on organic/inorganic hybrid materials are a key promising technology for harvesting mechanical energy due to their high piezoelectric coefficient and good mechanical flexibility. However, the negative piezoelectric effect of the polymer component in composite devices severely undermines its overall piezoelectricity, compromising the output performance of PVDF-based piezoelectric hybrid nanogenerators. Here, to conquer this, we report a two-step poling schedule to orient the dipoles of organic and inorganic components in the same direction. The optimized nanogenerator delivers a combination of high piezoelectric coefficient, great output performance, and remarkable stability. The isotropic piezoelectricity in the composite device collaborates to output a maximum voltage of 110 V and a power density of 7.8 μW cm-2. This strategy is also applied to elevate the piezoelectricity of other organic/inorganic-hybrid-based nanogenerators, substantiating its universal applicability for composite piezoelectric nanogenerators. This study presents a feasible strategy for enhancing the effective output capability of composite nanogenerator technologies.

Original languageEnglish
Pages (from-to)34733-34741
Number of pages9
JournalACS Applied Materials and Interfaces
Issue number30
Publication statusPublished - 2022 Aug 3

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (grant no. U1806221) and the Instruction & Development Project for the National Funding Innovation Demonstration Zone of Shandong Province (2018ZCQZB01 and 2019ZCQZB03). H.G. acknowledges the fellowship provided by the China Scholarship Council (CSC).

Publisher Copyright:
© 2022 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)


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