Flexible lead-free piezoelectric arrays for high-efficiency wireless ultrasonic energy transfer and communication

Jiang, Laiming; Wu, Bo; Wei, Xiaowei; Lv, Xiang; Xue, Haoyue; Lu, Guoxing; Zeng, Yushun; Xing, Jie; Wu, Wenjuan; Wu, Jiagang

doi:10.1039/d2mh00437b

Cited by 27 publications

(32 citation statements)

References 48 publications

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“…h) Comparison in the average charging power with different ultrasound energy harvesters. [ 48,49,55,58,59 ] i) Schematic diagrams of the ex vivo porcine model. The insets on the right are schematic (top) and photo (bottom) of the U‐PEH implanted into porcine tissue.…”

Section: Resultsmentioning

confidence: 99%

“…It is obvious that the larger the capacity of the capacitor, the slower the charging speed and the lower the stored voltage. Generally, the average charging P ave can be evaluated by the Equation 6 [ 59 ] :

\begin{array}{*{20}{c}}{{P_{{\rm{ave}}}} = \frac{{{C_{\rm{s}}}{V^2}}}{{2T}}}\end{array}

where the C s is the capacitance, V is the stored voltage and T is the charging time. The voltage stored in the capacitor (1000 µF) increased to 1.3 V during 60‐s charging (Figure S18, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…Results show that the transducer used in this work can generate strong acoustic signals, guaranteeing the feasibility of ultrasound-induced energy transmission. Figure 6c compares the waveforms of the input [48,49,55,58,59] trigger signal sent to the transducer and the output signal from the corresponding U-PEH. Under the excitation of a 1 MHz sinusoidal ultrasound pulse, the induced output signal shows a consistent periodicity of 1 µs.…”

Section: Lead-free Porous Piezoceramics For High-efficiency Wireless ...mentioning

confidence: 99%

Section: Lead-free Porous Piezoceramics For High-efficiency Wireless ...mentioning

confidence: 99%

“…g) Charging curves of various capacitors (47, 100, 470, and 1000 µF) with U-PEH. h) Comparison in the average charging power with different ultrasound energy harvesters [48,49,55,58,59]. i) Schematic diagrams of the ex vivo porcine model.…”

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confidence: 99%

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Multilevel Structure Engineered Lead‐Free Piezoceramics Enabling Breakthrough in Energy Harvesting Performance for Bioelectronics

Xue

Jiang

et al. 2022

Adv Funct Materials

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The prevalence of wearable/implantable medical electronics together with the rapid development of the Internet of Medicine Things call for the advancement of biocompatible, reliable, and high-efficiency energy harvesters. However, most current harvesters are based on toxic lead-based piezoelectric materials, raising biological safety concerns. What hinders the application of lead-free piezoelectric energy harvesters (PEHs) is the low power output, where the key challenge lies in obtaining a high piezoelectric voltage constant (g 33 ) and harvesting figure of merit (d 33 × g 33 ). Here, micron pores are introduced into phased boundary engineered high-performance (K, Na)NbO 3based ceramic matrix, resulting in the state-of-the-art g 33 and the highest d 33 × g 33 values of 57.3 × 10 −3 Vm N −1 and 20887 × 10 −15 m 2 N −1 in lead-free piezoceramics, respectively. Concomitantly, ultrahigh energy harvesting performances are obtained in porous ceramic PEHs, with output voltage and power density of 200 V and 11.6 mW cm −2 under instantaneous force impact and an average charging rate of 14.1 µW under high-frequency (1 MHz) ultrasound excitation, far outperforming previously reported PEHs. Porous ceramic PEHs are further developed into wearable and bio-implantable devices for human motion sensing and percutaneous ultrasound power transmission, opening avenues for the design of next-generation eco-friendly WIMEs.

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Section: Resultsmentioning

confidence: 99%

\begin{array}{*{20}{c}}{{P_{{\rm{ave}}}} = \frac{{{C_{\rm{s}}}{V^2}}}{{2T}}}\end{array}

Section: Resultsmentioning

confidence: 99%

Section: Lead-free Porous Piezoceramics For High-efficiency Wireless ...mentioning

confidence: 99%

Section: Lead-free Porous Piezoceramics For High-efficiency Wireless ...mentioning

confidence: 99%

mentioning

confidence: 99%

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Multilevel Structure Engineered Lead‐Free Piezoceramics Enabling Breakthrough in Energy Harvesting Performance for Bioelectronics

Xue

Jiang

et al. 2022

Adv Funct Materials

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Piezoelectricity in Biomedical Applications

Jiang,

2024

Piezoelectric Materials

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Implantable Flexible Sensors for Health Monitoring

Yu,

Zhu,

Chen

et al. 2023

Adv Healthcare Materials

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Flexible sensors, as a significant component of flexible electronics, have attracted great interest the realms of human–computer interaction and health monitoring due to their high conformability, adjustable sensitivity, and excellent durability. In comparison to wearable sensor‐based in vitro health monitoring, the use of implantable flexible sensors (IFSs) for in vivo health monitoring offers more accurate and reliable vital sign information due to their ability to adapt and directly integrate with human tissue. IFSs show tremendous promise in the field of health monitoring, with unique advantages such as robust signal reading capabilities, lightweight design, flexibility, and biocompatibility. Herein, a review of IFSs for vital signs monitoring is detailly provided, highlighting the essential conditions for in vivo applications. As the prerequisites of IFSs, the stretchability and wireless self‐powered properties of the sensor are discussed, with a special attention paid to the sensing materials which can maintain prominent biosafety (i.e., biocompatibility, biodegradability, bioresorbability). Furthermore, the applications of IFSs monitoring various parts of the body are described in detail, with a summary in brain monitoring, eye monitoring, and blood monitoring. Finally, the challenges as well as opportunities in the development of next‐generation IFSs are presented.

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Flexible lead-free piezoelectric arrays for high-efficiency wireless ultrasonic energy transfer and communication

Abstract: Implantable medical electronics (IMEs) are now becoming increasingly prevalent for diagnostic and therapeutic purposes. Despite extensive efforts, a primary challenge for IMEs is reliable wireless power and communication to provide...

Cited by 27 publications

References 48 publications

Multilevel Structure Engineered Lead‐Free Piezoceramics Enabling Breakthrough in Energy Harvesting Performance for Bioelectronics

Multilevel Structure Engineered Lead‐Free Piezoceramics Enabling Breakthrough in Energy Harvesting Performance for Bioelectronics

Piezoelectricity in Biomedical Applications

Implantable Flexible Sensors for Health Monitoring

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