Ultrahigh piezoelectricity in lead-free piezoceramics by synergistic design

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WANG, Dawei, FAN, Zhongming, RAO, Guanghui, WANG, Ge, LIU, Yao, YUAN, Changlai, MA, Tao, LI, Dejun, TAN, Xiaoli, LU, Zhilun, FETEIRA, Antonio, LIU, Shiyu, ZHOU, Changrong and ZHANG, Shujun (2020). Ultrahigh piezoelectricity in lead-free piezoceramics by synergistic design. Nano Energy, 76, p. 104944. [Article]

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Abstract

Following increased environmental concerns on the toxicity of lead, the discovery of ultrahigh piezoelectricity in lead-free piezoelectric materials is critical for the substitution of commercial lead zirconate titanate (PZT) ceramics in numerous electronic devices. In this work, a synergistic design strategy is proposed to enhance the piezoelectricity in lead-free piezoelectric materials by flattening the Gibbs free energy density profile, via the coexistence of multiple phases and local structural heterogeneity. This strategic material design approach is based on first-principles calculations combined with Landau phenomenological theory and phase field simulations. Sustainable Stannum-doped BaTiO3 lead-free ferroelectric ceramics are prepared to validate our proposed mechanism, and a giant piezoelectric coefficient d33 > 1100 pC/N is achieved, being the highest value reported in lead-free piezoceramics. The mechanism and paradigm of the excellent piezoelectricity achieved here provides a feasible solution for replacing lead-based piezoelectrics by lead-free counterparts.

More Information

Official URL:

https://www.sciencedirect.com/science/article/pii/...

Uncontrolled Keywords:

0303 Macromolecular and Materials Chemistry; 0912 Materials Engineering; 1007 Nanotechnology

Page Range:

p. 104944

Identifiers

Identification Number:

10.1016/j.nanoen.2020.104944

ORCID for Dawei Wang: