TY - JOUR
T1 - Ultrahigh energy harvesting properties in textured lead-free piezoelectric composites
AU - Sun, Yuan
AU - Chang, Yunfei
AU - Wu, Jie
AU - Liu, Yingchun
AU - Jin, Li
AU - Zhang, Shantao
AU - Yang, Bin
AU - Cao, Wenwu
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant no. 51502055, 11572103, and 51572056), the Natural Science Foundation of Heilongjiang Province (Grant no. E2015001 and JC2017001), and the Fundamental Research Funds for the Central Universities (Grant no. HIT.BRETIII.201504). Thanks to Prof. Yudong Hou and Dr Mupeng Zheng from Beijing University of Technology for the help with power generation measurements.
Publisher Copyright:
© 2019 The Royal Society of Chemistry.
PY - 2019
Y1 - 2019
N2 - Piezoelectric energy harvesters have gained significant attention in recent years due to the strong demand of sustainable power sources for wireless sensor networks and portable/wearable electronics. However, the relatively low figure of merit (d × g) induced by thermodynamic constraints seriously hinders the enhancement of power generation capability in lead-free piezoelectrics. In this work, crystallographic texture and composite design strategies were integrated to develop novel 0-3 type (Ba, Ca)(Ti, Sn)O 3 /BaTiO 3 (BCTS/BT) composites with highly [001] c -oriented and "core-shell" structured grains to resolve this challenge. Increasing texture degree F 001 above 86% enabled rapid enhancements of piezoelectric charge/strain coefficients d 33 and . Meanwhile, the inclusion of low-ϵ r BT microcrystals inside the oriented BCTS grains effectively suppressed the dielectric permittivity ϵ r of the composites, thus remarkably improving the piezoelectric voltage coefficient g 33 . Especially, the 98%-textured 0-3 composites demonstrated as high as ∼405% improvement in d 33 × g 33 value (17.0 × 10 -12 m 2 N -1 ), attributed to the strong piezoelectric anisotropy, the formation of much finer domains and the elastoelectric composite effect. The cantilever energy harvesters based on such composites possessed ∼560% enhancement in power density (4.5 μW mm -3 ) at 1 g acceleration relative to the non-textured counterpart, which significantly outperformed many previously reported lead-free piezoelectrics. This work provides a new important paradigm for developing high-performance viable green energy harvesters, which can largely expand the application fields of lead-free piezoelectrics.
AB - Piezoelectric energy harvesters have gained significant attention in recent years due to the strong demand of sustainable power sources for wireless sensor networks and portable/wearable electronics. However, the relatively low figure of merit (d × g) induced by thermodynamic constraints seriously hinders the enhancement of power generation capability in lead-free piezoelectrics. In this work, crystallographic texture and composite design strategies were integrated to develop novel 0-3 type (Ba, Ca)(Ti, Sn)O 3 /BaTiO 3 (BCTS/BT) composites with highly [001] c -oriented and "core-shell" structured grains to resolve this challenge. Increasing texture degree F 001 above 86% enabled rapid enhancements of piezoelectric charge/strain coefficients d 33 and . Meanwhile, the inclusion of low-ϵ r BT microcrystals inside the oriented BCTS grains effectively suppressed the dielectric permittivity ϵ r of the composites, thus remarkably improving the piezoelectric voltage coefficient g 33 . Especially, the 98%-textured 0-3 composites demonstrated as high as ∼405% improvement in d 33 × g 33 value (17.0 × 10 -12 m 2 N -1 ), attributed to the strong piezoelectric anisotropy, the formation of much finer domains and the elastoelectric composite effect. The cantilever energy harvesters based on such composites possessed ∼560% enhancement in power density (4.5 μW mm -3 ) at 1 g acceleration relative to the non-textured counterpart, which significantly outperformed many previously reported lead-free piezoelectrics. This work provides a new important paradigm for developing high-performance viable green energy harvesters, which can largely expand the application fields of lead-free piezoelectrics.
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U2 - 10.1039/c8ta10312g
DO - 10.1039/c8ta10312g
M3 - Article
AN - SCOPUS:85061820850
SN - 2050-7488
VL - 7
SP - 3603
EP - 3611
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 8
ER -