Ultrahigh piezoelectricity in lead-free piezoceramics by synergistic design

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.

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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.

Item Type:	Article
Uncontrolled Keywords:	0303 Macromolecular and Materials Chemistry; 0912 Materials Engineering; 1007 Nanotechnology
Identification Number:	https://doi.org/10.1016/j.nanoen.2020.104944
Page Range:	p. 104944
SWORD Depositor:	Symplectic Elements
Depositing User:	Symplectic Elements
Date Deposited:	30 Jun 2020 12:16
Last Modified:	27 Jun 2021 01:18
URI:	https://shura.shu.ac.uk/id/eprint/26530

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