Efficient conversion of sound noise into electric energy using electrospun polyacrylonitrile membranes

Shao, Huili; Wang, Hongxia; Cao, Yuying; Ding, Xiang; Fang, J.; Niu, Haitao; Wang, Wenyu; Lang, Chenhong; Lin, Tong

doi:10.1016/j.nanoen.2020.104956

Cited by 65 publications

(53 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 30 ] The peaks at 1252 and 1231 cm –1 corresponded to the zigzag conformation and 3 1 ‐helical conformation of PAN. [ 31,32 ] Based on the peak areas, the zigzag conformation content ( Φ ) was calculated by Equation () [ 21 ]

Δ = \frac{S_{1252}}{S_{1252} + S_{1231}}

where S 1252 and S 1231 are the peak areas at 1252 and 1231 cm –1 , respectively. The Φ for the PAN nanofibers was 81.6%.…”

Section: Resultsmentioning

confidence: 99%

“…[ 41,42 ] Increasing fiber fineness significantly increases their vibration velocity, and uniform nanofibers show higher vibration velocity than defect fibers. [ 21 ]…”

Section: Resultsmentioning

confidence: 99%

“…In the previous study, it was found that electrospun PAN nanofiber membranes with a thickness of 30 µm had the best acoustic‐to‐electrical energy conversion ability. [ 21 ] In this study, PAN nanofiber membranes of thickness 30 µm were used for making the sensor devices.…”

Section: Methodsmentioning

confidence: 99%

“…The team further reported that electrospun poly(vinylidene fluoride-co-trifluoroethylene) membranes had higher acoustoelectric conversion outputs than PVDF and can be used for power generation. [24] Shao et al [21] reported that electrospun PAN nanofiber membranes could generate higher voltage outputs than PVDF in the same condition. A 3 × 4 cm 2 PAN nanofiber membrane could convert noise (e.g., 117 dB) into 58 V pulse voltage with an energy conversion efficiency as high as 85.9%.…”

Section: Introductionmentioning

confidence: 99%

“…[ 24 ] Shao et al. [ 21 ] reported that electrospun PAN nanofiber membranes could generate higher voltage outputs than PVDF in the same condition. A 3 × 4 cm 2 PAN nanofiber membrane could convert noise (e.g., 117 dB) into 58 V pulse voltage with an energy conversion efficiency as high as 85.9%.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

High‐Performance Voice Recognition Based on Piezoelectric Polyacrylonitrile Nanofibers

Shao

Wang

Cao

et al. 2021

Adv Elect Materials

Self Cite

View full text Add to dashboard Cite

Acoustic sensors show a wide application in diverse fields. However, it is still a challenge to develop highly sensitive transducing materials for the detection of low‐to‐middle decibel sounds. Herein, for the first time the remarkable property of an acoustic sensor based on electrospun polyacrylonitrile (PAN) nanofibers in the recognition of human voices is reported. The nanofiber device shows a sensitivity as high as 23 401 mV P−1 to 70 dB sound, which is much higher than most of the acoustic sensors reported in the literature. First the sounds from different musical instruments are used as a standard sound source to show the high accuracy of the nanofiber device to distinguish different sounds, e.g., from both the same and different instruments, and then people's voices are tested. Experimental results show that the device can distinguish people's voices with high resolution and the influence of background noise on speech recognition is very small. The acoustic sensor is stable and can be used in sound detection for a long time. Electrospun PAN membranes may be useful for the development of voice recognition systems for security, environmental protection, scientific research, and other high‐tech applications.

show abstract

Δ = \frac{S_{1252}}{S_{1252} + S_{1231}}

where S 1252 and S 1231 are the peak areas at 1252 and 1231 cm –1 , respectively. The Φ for the PAN nanofibers was 81.6%.…”

Section: Resultsmentioning

confidence: 99%

“…[ 41,42 ] Increasing fiber fineness significantly increases their vibration velocity, and uniform nanofibers show higher vibration velocity than defect fibers. [ 21 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

High‐Performance Voice Recognition Based on Piezoelectric Polyacrylonitrile Nanofibers

Shao

Wang

Cao

et al. 2021

Adv Elect Materials

Self Cite

View full text Add to dashboard Cite

show abstract

A Universal Power Management Strategy Based on Novel Sound‐Driven Triboelectric Nanogenerator and Its Fully Self‐Powered Wireless System Applications

Wang

Wei-bo

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

With the development of the Internet of Things (IoT), the power supply to trillions of IoT nodes has become a serious challenge. It is of significant importance to propose a rational power management scheme for constructing fully self‐powered systems using triboelectric nanogenerators (TENG). In this study, as inspired by an embroidery hoop, a new type of TENG without the Helmholtz resonant cavity is developed for collecting sound energy, which can generate the Voc and Isc up to 500 V and 124 µA, respectively at a resonance frequency of 170 Hz and sound pressure of 110 dB. Furthermore, the sound‐driven TENG integrated with a specially designed power management circuit derived from the universal power management strategy (PMS) can successfully drive a commercial narrow band‐IoT wireless node, which realizes periodic temperature and humidity data acquisition and transmission. With the same strategy, an electric switch and a temperature and humidity acquisition system based on Bluetooth technology can also be powered by a contact‐separated TENG and a wind‐driven TENG, demonstrating excellent versatility, adaptability, and universality of the PMS. This study provides a novel solution for the application of TENG in the field of low‐frequency IoT in local and wide areas.

show abstract

High‐Performance Flexible Schottky DC Generator via Metal/Conducting Polymer Sliding Contacts

Yang

Benner

Guo

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Dynamic Schottky direct‐current (DC) generators hold great promise for ambient mechanical energy harvesting as it overcomes the low‐current output limitation in conventional approaches. However, the lack of a fundamental understanding of DC generation in conducting polymer‐based Schottky generators has hindered their application for self‐powered wearable and implantable electronics. Here, a high‐performance, flexible Schottky DC generator with metal/conducting polymer sliding contact system is demonstrated, which exhibits a large current density (J) up to 20 A m–2 for single contact geometry and a scaled‐up DC output reaching 200 µA (J = 0.73 A m–2) and 0.8 V. The design of flexibility in such a Schottky DC generator is inherited from the long‐chain polymer concept, leading to the demonstration of a variety of device configuration of free‐standing thin film, supported thin film and nanocomposite prototype toward practical applications. It is revealed that the sliding junctions may exhibit a different mechanical energy conversion mechanism compared to the compressive conducting polymer Schottky junctions. It is also proven that the magnitude and polarity of DC generation is determined by the Schottky contact formation and interfacial electric field. The concept of a flexible Schottky generator not only shows great promise for next‐generation, self‐powered wearable devices, but also provides potential mechanisms for developing novel wearable sensors.

show abstract

Efficient conversion of sound noise into electric energy using electrospun polyacrylonitrile membranes

Cited by 65 publications

References 44 publications

High‐Performance Voice Recognition Based on Piezoelectric Polyacrylonitrile Nanofibers

High‐Performance Voice Recognition Based on Piezoelectric Polyacrylonitrile Nanofibers

A Universal Power Management Strategy Based on Novel Sound‐Driven Triboelectric Nanogenerator and Its Fully Self‐Powered Wireless System Applications

High‐Performance Flexible Schottky DC Generator via Metal/Conducting Polymer Sliding Contacts

Contact Info

Product

Resources

About