Recent Progress of Wearable Piezoelectric Nanogenerators

Zhang, Cong; Fan, Wei; Wang, Shujuan; Wang, Qi; Zhang, Yifan; Dong, Kai

doi:10.1021/acsaelm.1c00165

Cited by 109 publications

(79 citation statements)

References 158 publications

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“…The functional PZT ceramic particles were synthesized using the method reported in previous studies. − The commercial PZT powder was calcined at 1150 °C for 36 h to remove the polar groups and moisture absorbed on the surface of the PZT particles, as well as to induce phase formation and particle size growth. After that, the interconnected calcined PZT was ground for 4 h in a ball mill to prepare pure PZT powder.…”

Section: Methodsmentioning

confidence: 99%

Piezoelectric Property Enhancement of PZT/Poly(vinylidenefluoride-co-trifluoroethylene) Hybrid Films for Flexible Piezoelectric Energy Harvesters

Chen

Cheng

et al. 2021

ACS Omega

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In this study, lead zirconate titanate (PZT) ceramic particles were added for further improvement. PZT belongs to the perovskite family and exhibits good piezoelectricity. Thus, it was added in this experiment to enhance the piezoelectric response of the poly(vinylidenefluoride- co -trifluoroethylene) (PVDF-TrFE) copolymer, which produced a voltage output of 1.958 V under a cyclic pressure of 290 N. In addition, to further disperse the PZT particles in the PVDF-TrFE matrix, tetradecylphosphonic acid (TDPA) was synthesized and employed to modify the PZT surface, after which the surface-modified PZT (m-PZT) particles were added to the PVDF-TrFE matrix. The TDPA on the PZT surface made it difficult for the particles to aggregate, allowing them to disperse in the polymer solution more stably. In this way, the PZT particles with piezoelectric responses could be uniformly dispersed in the PVDF-TrFE film, thereby further enhancing its overall piezoelectric response. The test results showed that upon the addition of 10 wt % m-PZT, the piezoelectric coefficient of m-PZT/PVDF-TrFE 10 wt % was 27 pC/N; and under a cyclic pressure of 290 N, the output voltage reached 3.426 V, which demonstrated a better piezoelectric response than the polymer film with the original PZT particles. Furthermore, the piezoelectric coefficient of m-PZT/PVDF-TrFE 10 wt % was 27.1 pC/N. This was exhibited by maintaining a piezoelectric coefficient of 26.8 pC/N after 2000 cycles. Overall, a flexible piezoelectric film with a high piezoelectric coefficient was prepared by following a simple fabrication process, which showed that this film possesses great commercial potential.

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Section: Methodsmentioning

confidence: 99%

Piezoelectric Property Enhancement of PZT/Poly(vinylidenefluoride-co-trifluoroethylene) Hybrid Films for Flexible Piezoelectric Energy Harvesters

Chen

Cheng

et al. 2021

ACS Omega

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“…The change of relative resistance of SMCF increases monotonically with strain and the maximal strain reaches 373%. The gauge factor (GF), which is frequently used to evaluate the sensitivity of a strain sensor, is estimated according to Equation (2).…”

Section: Electrical Characterization Of Strain Sensorsmentioning

confidence: 99%

“…Flexible, stretchable, and lightweight electronic conductors are the indispensable components of wearable electronics [1] which enable the applications of wearable electronics in healthcare, [2] artificial skins, [3] flexible sensors, [4] and supercapacitors [5] that cannot be achieved using commercial wires. [6] Unlike the rigid commercial metal wires, stretchable conductive fibers do not in a variety of functional conductive structures.…”

Section: Introductionmentioning

confidence: 99%

A One‐Step Fabricated Sheath‐Core Stretchable Fiber Based on Liquid Metal with Superior Electric Conductivity for Wearable Sensors and Heaters

Fan

Yang

et al. 2022

Adv Materials Technologies

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Conductors with high conductivity and stretchability are the crucial components of smart wearable electronics. However, most of the reported conductors have disadvantages of single function, high energy consumption, which seriously limit their application in wearable electronics. Here, a kind of stretchable (up to 373%), highly conductive (the same order of magnitude as commercial metal wire), and multifunctional sheath‐core fibers based on liquid metal that can be continuously fabricated in large quantity through a coaxial wet‐spinning process are reported. The simple preparation method of the fibers can realize continuous and mass production (1 m min–1 in the laboratory). When the fibers are used as an electric heater, the temperature can reach 58 °C at 0.6 V and the heating rate is obviously faster than the ambient temperature under infrared light. When the fibers are used as a wearable sensor, the tiny force of 0.001 cN can be detected and objects at less than 40 cm can be detected without contact. The stretchable fibers with high electric conductivity may provide strong supports for the commercialization of wearable electronics and pave the way toward full‐fledged multifunctional wearable sensors.

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“…Commonly used piezoelectric materials include composites, polymers, ceramics, single crystals, etc. [55].…”

Section: Piezoelectric Sensormentioning

confidence: 99%

Textile-Based Mechanical Sensors: A Review

et al. 2021

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Innovations related to textiles-based sensors have drawn great interest due to their outstanding merits of flexibility, comfort, low cost, and wearability. Textile-based sensors are often tied to certain parts of the human body to collect mechanical, physical, and chemical stimuli to identify and record human health and exercise. Until now, much research and review work has been carried out to summarize and promote the development of textile-based sensors. As a feature, we focus on textile-based mechanical sensors (TMSs), especially on their advantages and the way they achieve performance optimizations in this review. We first adopt a novel approach to introduce different kinds of TMSs by combining sensing mechanisms, textile structure, and novel fabricating strategies for implementing TMSs and focusing on critical performance criteria such as sensitivity, response range, response time, and stability. Next, we summarize their great advantages over other flexible sensors, and their potential applications in health monitoring, motion recognition, and human-machine interaction. Finally, we present the challenges and prospects to provide meaningful guidelines and directions for future research. The TMSs play an important role in promoting the development of the emerging Internet of Things, which can make health monitoring and everyday objects connect more smartly, conveniently, and comfortably efficiently in a wearable way in the coming years.

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Recent Progress of Wearable Piezoelectric Nanogenerators

Cited by 109 publications

References 158 publications

Piezoelectric Property Enhancement of PZT/Poly(vinylidenefluoride-co-trifluoroethylene) Hybrid Films for Flexible Piezoelectric Energy Harvesters

Piezoelectric Property Enhancement of PZT/Poly(vinylidenefluoride-co-trifluoroethylene) Hybrid Films for Flexible Piezoelectric Energy Harvesters

A One‐Step Fabricated Sheath‐Core Stretchable Fiber Based on Liquid Metal with Superior Electric Conductivity for Wearable Sensors and Heaters

Textile-Based Mechanical Sensors: A Review

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