Future wearable electronics require sustainable power sources,and nanogenerators offer promising solutions to convert ambient mechanical energy to electricity while ensuring flexibility,durability,and practical deploy...Future wearable electronics require sustainable power sources,and nanogenerators offer promising solutions to convert ambient mechanical energy to electricity while ensuring flexibility,durability,and practical deployment.This work demonstrates a textile-based piezoelectric nanogenerator(T-PENG),which is a durable and scalable energy-harvesting system,using the inherent strength of 2D materials to elevate the performance metrics significantly.Screen printable 2D graphene ink was used for developing the textile-based flexible electrodes.The composite layer was prepared using zinc oxide(ZnO)enclosed molybdenum disulfide(MoS_(2))(MoS_(2)@ZnO)and a screen printable paste.The incorporation of 2D MoS_(2) into the T-PENG system significantly enhances its output performance.This improvement is further validated by COMSOL computer simulations,which align closely with the experimental findings.At 10 wt%of MoS_(2),d33 value of our device reaches-5.67 pC N1,an approximately threefold improvement over the MoS_(2)-free device.Furthermore,T-PENG resulted in a significantly high open-circuit voltage(Voc)of-60 V,and a peak power density(J)of 126.84 mW m^(2).Moreover,T-PENG demonstrates high durability and flexibility while retaining-92%of its output power over 3 months and sustaining-90%efficiency after 500 bending cycles.T-PENG demonstrated the ability to power over 60 blue light emitting diodes(LEDs)and functions as a self-powered sensor.These advancements position MoS_(2) as a significant material for next-generation multifunctional smart textiles.展开更多
We report triboelectric nanogenerators （TENGs） composed of a flexible and cost-effective gold-coated conductive textile （CT） to convert wind energy into electricity. The Au-coated CT is employed because of its hig...We report triboelectric nanogenerators （TENGs） composed of a flexible and cost-effective gold-coated conductive textile （CT） to convert wind energy into electricity. The Au-coated CT is employed because of its high surface roughness resulting from Au nanodots distributed on microsized fibers. Thus, the Au-coated CT with nano/microarchitecture plays an important role in enhancing the effective contact area as well as the output performance of the TENG. Moreover, the surface roughness of the Au-coated CT is controlled by adjusting the Au thermal deposition time or tailoring the diameter of the Au nanodots. At an applied wind speed of 10 m.s-1, a wind-based TENG （W-TENG） with dimensions of 75 mm × 12 mm ×25 mm produces an open-circuit voltage （Voc） of - 39 V and a short-circuit current （Isc） of - 3 A by using the airflow-induced vibrations of an optimized Au-coated CT between two flat polydimethylsiloxane （PDMS） layers. To further specify the device performance, the electric output of the W-TENG is analyzed by varying several parameters such as the distance between the PDMS layer and Au-coated CT, applied wind speed, external load resistance, and surface roughness of the PDMS layers. Introducing an inverse micropyramid architecture on the PDMS layers further improves the output performance of the W-TENG, which exhibits the highest Voc （- 49 V） and Isc （- 5μA） values at an applied wind speed of 6.8 m.s-1. Additionally, the reliability of the W-TENG is also tested by measuring its output current during long-term cyclic operation. Furthermore, the rectified output signals observed by the W-TENG device are used as a direct power source to light 45 green commercial light-emitting diodes connected in series and also to charge capacitors （100 and 4.7μF）. Finally, the output performance of the W-TENG device in an actual windy situation is also investigated.展开更多
基金funding support from the UWE Partnership PhD Scheme and UKRI Research England’s Expanding Excellence in England(E3)grantI.A.extends their sincere appreciation to Kathryn Lamb-Riddell and Timothy Cox for providing access and assistance with Raman spectroscopy,David Patton for his expertise in SEM imaging,and Paul Bowdler for providing access to the FTIR facilityWe gratefully acknowledge Prof.Chris Bowen(University of Bath,UK)for generously providing access to the d33 measurement facility。
文摘Future wearable electronics require sustainable power sources,and nanogenerators offer promising solutions to convert ambient mechanical energy to electricity while ensuring flexibility,durability,and practical deployment.This work demonstrates a textile-based piezoelectric nanogenerator(T-PENG),which is a durable and scalable energy-harvesting system,using the inherent strength of 2D materials to elevate the performance metrics significantly.Screen printable 2D graphene ink was used for developing the textile-based flexible electrodes.The composite layer was prepared using zinc oxide(ZnO)enclosed molybdenum disulfide(MoS_(2))(MoS_(2)@ZnO)and a screen printable paste.The incorporation of 2D MoS_(2) into the T-PENG system significantly enhances its output performance.This improvement is further validated by COMSOL computer simulations,which align closely with the experimental findings.At 10 wt%of MoS_(2),d33 value of our device reaches-5.67 pC N1,an approximately threefold improvement over the MoS_(2)-free device.Furthermore,T-PENG resulted in a significantly high open-circuit voltage(Voc)of-60 V,and a peak power density(J)of 126.84 mW m^(2).Moreover,T-PENG demonstrates high durability and flexibility while retaining-92%of its output power over 3 months and sustaining-90%efficiency after 500 bending cycles.T-PENG demonstrated the ability to power over 60 blue light emitting diodes(LEDs)and functions as a self-powered sensor.These advancements position MoS_(2) as a significant material for next-generation multifunctional smart textiles.
文摘We report triboelectric nanogenerators （TENGs） composed of a flexible and cost-effective gold-coated conductive textile （CT） to convert wind energy into electricity. The Au-coated CT is employed because of its high surface roughness resulting from Au nanodots distributed on microsized fibers. Thus, the Au-coated CT with nano/microarchitecture plays an important role in enhancing the effective contact area as well as the output performance of the TENG. Moreover, the surface roughness of the Au-coated CT is controlled by adjusting the Au thermal deposition time or tailoring the diameter of the Au nanodots. At an applied wind speed of 10 m.s-1, a wind-based TENG （W-TENG） with dimensions of 75 mm × 12 mm ×25 mm produces an open-circuit voltage （Voc） of - 39 V and a short-circuit current （Isc） of - 3 A by using the airflow-induced vibrations of an optimized Au-coated CT between two flat polydimethylsiloxane （PDMS） layers. To further specify the device performance, the electric output of the W-TENG is analyzed by varying several parameters such as the distance between the PDMS layer and Au-coated CT, applied wind speed, external load resistance, and surface roughness of the PDMS layers. Introducing an inverse micropyramid architecture on the PDMS layers further improves the output performance of the W-TENG, which exhibits the highest Voc （- 49 V） and Isc （- 5μA） values at an applied wind speed of 6.8 m.s-1. Additionally, the reliability of the W-TENG is also tested by measuring its output current during long-term cyclic operation. Furthermore, the rectified output signals observed by the W-TENG device are used as a direct power source to light 45 green commercial light-emitting diodes connected in series and also to charge capacitors （100 and 4.7μF）. Finally, the output performance of the W-TENG device in an actual windy situation is also investigated.
