With the rapid development of wearable electronic devices,modern portable energy sources pay more attention to lightweight,low cost,high flexibility and high efficiency.This paper proposed a flexible single-electrode ...With the rapid development of wearable electronic devices,modern portable energy sources pay more attention to lightweight,low cost,high flexibility and high efficiency.This paper proposed a flexible single-electrode triboelectric nanogenerator(S-TENG)composed of multi-walled carbon nanotube(MWCNT)/polydimethylsiloxane(PDMS)film.The S-TENG has the advantages of high flexibility,high hydrophobicity,light weight,low cost,and high output efficiency.The peak-to-peak open circuit voltage can reach 435 V and the maximum short-circuit current density is 13μA·cm^(−2) under continuous pressing.When the external load is 40 MΩ,the maximum output power density is 3.7 mW·cm^(−2).The S-TENG can not only harvest the mechanical energy generated by biological movement,but also can be used as a sensor to effectively detect human movement and handwriting traces.In addition,a 4×4 sensor array and a wireless transmission system were constructed to realize multi-point distributed detection and wireless transmission of portable smart terminals.The S-TENG can harvest energy from falling water droplets,uninterrupted water flow,wind and percussion sounds,which demonstrates its broad application prospects in the field of flexible wearables.展开更多
Triboelectric nanogenerators(TENGs)have recently drawn much attention in the field of biomechanical energy harvesting and motion monitoring.However,the electrode stretchability and contact-separation model induced com...Triboelectric nanogenerators(TENGs)have recently drawn much attention in the field of biomechanical energy harvesting and motion monitoring.However,the electrode stretchability and contact-separation model induced complicated packed structure remain a problem that heavily affects output performance during various human movements and requires to be urgently addressed.Here,a single-electrode piezotriboelectric hybrid nanogenerator(SEP-TENG)integrated with stretchable liquid-metal metal electrodes is reported,which simultaneously achieves outstanding energy harvesting performance and skincomfort human motion monitoring.A polarized piezoelectric BaTiO_(3)/silicon rubber(SR)composites film is served as the effective negative tribomaterial,benefiting from the improved dielectric constant and piezoelectric charge transfer,the optimized SEP-TENG generates a high peak power density of 5.7 W/m^(2) while contacted with human skin.Besides,owing to the ultralow Young's modulus of the SR encapsulation layer and tribo-piezoelectric hybrid layer,the homogeneous integrated multilayer composite serves no break till a 745%elongation,promoting that the SEP-TENG could effectively harvest biomechanical energy and realize stable power supplying for wearable electronics even under large deformation state.Furthermore,the SEP-TENG could comfortably attach to the finger joints and collect bending energy.This work provides a novel design methodology for a single-electrode TENG to realize omnidirectional biomechanical energy harvesting and motion monitoring.展开更多
Flexible pressure sensors have broad application prospects,such as human motion monitoring and personalized recognition.However,their applicability is limited by complex structures,low output performance,low sensitivi...Flexible pressure sensors have broad application prospects,such as human motion monitoring and personalized recognition.However,their applicability is limited by complex structures,low output performance,low sensitivity,and narrow measurement range.In this study,we report a single-electrode spongy triboelectric sensor(SSTS)mainly composed of spongy composite multi-walled carbon nanotubes/polydimethylsiloxane(MWCNT/PDMS)film and conductive fabric,which can simultaneously generate contact electrification and electrostatic induction coupling in a single-electrode contact-separation mode.The SSTS combines the triboelectric effect,properties of doping material,and spongy porous structure(soft sugar as a sacrificial template).An SSTS with an MWCNT content of 10 wt%and a porosity of 64%exhibits high sensitivity,a wide measurement range,and excellent linearity.It also displays two sensitivity regions(slopes):1.324 V/kPa from 1.5 to 28 kPa in the low-pressure range and 0.096 V/kPa from 28 to 316.5 kPa in the high-pressure range,with linearities of 0.980 and 0.979,respectively.Furthermore,the SSTS delivers a high-performance output and high stability,thus enhancing the monitoring of hand pressure changes,human movement,personalized spatial recognition,and other detection tasks.This new strategy for human motion monitoring shows great potential in the healthcare fields,sports rehabilitation,and human-computer interactions.展开更多
Tactile sensors are one of the core components for intelligent robots to realize human-like tactile sensing functions.For the application scenarios of material classification and roughness recognition,an enhanced flex...Tactile sensors are one of the core components for intelligent robots to realize human-like tactile sensing functions.For the application scenarios of material classification and roughness recognition,an enhanced flexible triboelectric tactile sensor(FTTS)is proposed in this study.The FTTS is prepared based on a single-electrode triboelectric nanogenerator(SETENG),which generates the corresponding electrical signals by coming in contact with objects.To enhance the properties of the SE-TENG,the synergistic enhancement effect on the electrical output of the SE-TENG was explored by controlling the addition ratio of MXene and Carboxylated cellulose nanofibers(CNF-C).The charge-trapping mechanism of the chargetrapping layer was analyzed,and the effects of the type and thickness of the charge-trapping layer on the performance of the FTTS were systematically investigated.Inexpensive and simple fabricated braided microstructures were prepared using the template method,which showed the optimum capability in terms of self-cleaning and electrical output performance.With these improvements,the FTTS showed a voltage sensitivity of 2.88 V/10^(4)Pa in the pressure response range of 10-400 kPa,a linearity of 0.993,and a linear trend in the fitting curve.At the same time,the FTTS has a stable response frequency,fast response time,and extreme cycling stability(over 10000 cycles).In addition,in terms of roughness recognition,the FTTS can accurately recognize samples with different surface roughness.In terms of material classification,the accuracy of classifying 11materials with the visual geometry group(VGG)network reaches 96.08%.Based on these findings,FTTS-based tactile sensors offer diverse options in the future direction of electronic skin and tactile sensing.展开更多
Along with the unceasing growth of worldwide economic and the associated issues on resources,energy and environment,clean energy generating technologies that are based on recyclable materials,if possible,may become th...Along with the unceasing growth of worldwide economic and the associated issues on resources,energy and environment,clean energy generating technologies that are based on recyclable materials,if possible,may become the future trend of development.Here,we report the design of a cheap,lightweight,and recyclable single-electrode triboelectric nanogenerator(TENG)that utilizes waste paper as the triboelectric material.Under the current strategy,we successfully developed green energy machines without vastly increasing the mining of various critical minerals around the world.The as-designed TENG could not only collect and convert mechanical energy into electricity with sound efficiency,but also has the merit for continuous reuse and quick construction.The maximum output power density is as high as 171 mW·m^(-2) at a resistance of 130 MQ and could be integrated into a book for monitoring reading actions,thus providing a new approach to the low-cost,green and sustainable self-powered electronic systems.展开更多
基金financially supported by the National Natural Science Foundation of China(No.51777215)。
文摘With the rapid development of wearable electronic devices,modern portable energy sources pay more attention to lightweight,low cost,high flexibility and high efficiency.This paper proposed a flexible single-electrode triboelectric nanogenerator(S-TENG)composed of multi-walled carbon nanotube(MWCNT)/polydimethylsiloxane(PDMS)film.The S-TENG has the advantages of high flexibility,high hydrophobicity,light weight,low cost,and high output efficiency.The peak-to-peak open circuit voltage can reach 435 V and the maximum short-circuit current density is 13μA·cm^(−2) under continuous pressing.When the external load is 40 MΩ,the maximum output power density is 3.7 mW·cm^(−2).The S-TENG can not only harvest the mechanical energy generated by biological movement,but also can be used as a sensor to effectively detect human movement and handwriting traces.In addition,a 4×4 sensor array and a wireless transmission system were constructed to realize multi-point distributed detection and wireless transmission of portable smart terminals.The S-TENG can harvest energy from falling water droplets,uninterrupted water flow,wind and percussion sounds,which demonstrates its broad application prospects in the field of flexible wearables.
基金This work was supported by the National Key R&D Program of China(grant numbers 2019YFB2004802,2019YFE0120300)National Natural Science Foundation of China(grant numbers 51975542,52175554)+1 种基金National Defense Fundamental Research Project,Shanxi province key laboratory of quantum sensing and precision measurement(grant number 201905D121001)Natural Science Foundation of Shanxi Province(grant numbers 20210302123059,201801D121152).
文摘Triboelectric nanogenerators(TENGs)have recently drawn much attention in the field of biomechanical energy harvesting and motion monitoring.However,the electrode stretchability and contact-separation model induced complicated packed structure remain a problem that heavily affects output performance during various human movements and requires to be urgently addressed.Here,a single-electrode piezotriboelectric hybrid nanogenerator(SEP-TENG)integrated with stretchable liquid-metal metal electrodes is reported,which simultaneously achieves outstanding energy harvesting performance and skincomfort human motion monitoring.A polarized piezoelectric BaTiO_(3)/silicon rubber(SR)composites film is served as the effective negative tribomaterial,benefiting from the improved dielectric constant and piezoelectric charge transfer,the optimized SEP-TENG generates a high peak power density of 5.7 W/m^(2) while contacted with human skin.Besides,owing to the ultralow Young's modulus of the SR encapsulation layer and tribo-piezoelectric hybrid layer,the homogeneous integrated multilayer composite serves no break till a 745%elongation,promoting that the SEP-TENG could effectively harvest biomechanical energy and realize stable power supplying for wearable electronics even under large deformation state.Furthermore,the SEP-TENG could comfortably attach to the finger joints and collect bending energy.This work provides a novel design methodology for a single-electrode TENG to realize omnidirectional biomechanical energy harvesting and motion monitoring.
基金supported in part by the National Key Research and Development Program of China(Grant No.2019YFB2004802)the National Natural Science Foundation of China(Grant Nos.62171414,52175554,52205608,62171415&62001431)+1 种基金the Fundamental Research Program of Shanxi Province(Grant Nos.20210302123059&20210302124610)the Program for the Innovative Talents of Higher Education Institutions of Shanxi。
文摘Flexible pressure sensors have broad application prospects,such as human motion monitoring and personalized recognition.However,their applicability is limited by complex structures,low output performance,low sensitivity,and narrow measurement range.In this study,we report a single-electrode spongy triboelectric sensor(SSTS)mainly composed of spongy composite multi-walled carbon nanotubes/polydimethylsiloxane(MWCNT/PDMS)film and conductive fabric,which can simultaneously generate contact electrification and electrostatic induction coupling in a single-electrode contact-separation mode.The SSTS combines the triboelectric effect,properties of doping material,and spongy porous structure(soft sugar as a sacrificial template).An SSTS with an MWCNT content of 10 wt%and a porosity of 64%exhibits high sensitivity,a wide measurement range,and excellent linearity.It also displays two sensitivity regions(slopes):1.324 V/kPa from 1.5 to 28 kPa in the low-pressure range and 0.096 V/kPa from 28 to 316.5 kPa in the high-pressure range,with linearities of 0.980 and 0.979,respectively.Furthermore,the SSTS delivers a high-performance output and high stability,thus enhancing the monitoring of hand pressure changes,human movement,personalized spatial recognition,and other detection tasks.This new strategy for human motion monitoring shows great potential in the healthcare fields,sports rehabilitation,and human-computer interactions.
基金supported by the National Key R&D Program of China(Grant No.2019YFE0120300)the National Natural Science Foundation of China(Grant Nos.62171414,52175554,52205608,62171415,62001431)+1 种基金the Fundamental Research Program of Shanxi Province(Grant Nos.20210302123059,20210302124610)the Program for the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(Grant No.2020L0316)。
文摘Tactile sensors are one of the core components for intelligent robots to realize human-like tactile sensing functions.For the application scenarios of material classification and roughness recognition,an enhanced flexible triboelectric tactile sensor(FTTS)is proposed in this study.The FTTS is prepared based on a single-electrode triboelectric nanogenerator(SETENG),which generates the corresponding electrical signals by coming in contact with objects.To enhance the properties of the SE-TENG,the synergistic enhancement effect on the electrical output of the SE-TENG was explored by controlling the addition ratio of MXene and Carboxylated cellulose nanofibers(CNF-C).The charge-trapping mechanism of the chargetrapping layer was analyzed,and the effects of the type and thickness of the charge-trapping layer on the performance of the FTTS were systematically investigated.Inexpensive and simple fabricated braided microstructures were prepared using the template method,which showed the optimum capability in terms of self-cleaning and electrical output performance.With these improvements,the FTTS showed a voltage sensitivity of 2.88 V/10^(4)Pa in the pressure response range of 10-400 kPa,a linearity of 0.993,and a linear trend in the fitting curve.At the same time,the FTTS has a stable response frequency,fast response time,and extreme cycling stability(over 10000 cycles).In addition,in terms of roughness recognition,the FTTS can accurately recognize samples with different surface roughness.In terms of material classification,the accuracy of classifying 11materials with the visual geometry group(VGG)network reaches 96.08%.Based on these findings,FTTS-based tactile sensors offer diverse options in the future direction of electronic skin and tactile sensing.
基金support from the National key R and D Project from Minister of Science and Technology,China(Nos.2016YFA0202702 and 2016YFA0202701)the Key Research Program of Frontier Sciences,Chinese Academy of Sciences(CAS)(No.ZDBS-LY-DQC025).
文摘Along with the unceasing growth of worldwide economic and the associated issues on resources,energy and environment,clean energy generating technologies that are based on recyclable materials,if possible,may become the future trend of development.Here,we report the design of a cheap,lightweight,and recyclable single-electrode triboelectric nanogenerator(TENG)that utilizes waste paper as the triboelectric material.Under the current strategy,we successfully developed green energy machines without vastly increasing the mining of various critical minerals around the world.The as-designed TENG could not only collect and convert mechanical energy into electricity with sound efficiency,but also has the merit for continuous reuse and quick construction.The maximum output power density is as high as 171 mW·m^(-2) at a resistance of 130 MQ and could be integrated into a book for monitoring reading actions,thus providing a new approach to the low-cost,green and sustainable self-powered electronic systems.
