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Round-trip oscillation triboelectric nanogenerator with high output response and low wear to harvest random wind energy

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Nano Research 2023年第8期16卷 11259-11268页

作者： Xinyu Hu Junrui Feng Chuangjian Liang Heng Ning Chunjin Chen Jiayu Li Honggui Wen Huilu Yao Lingyu Wan Guanlin Liu Guangxi Key Laboratory of Electrochemical Energy Materials School of Physical Science and TechnologyGuangxi UniversityNanning 530004China beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400China

Triboelectric nanogenerator(TENG)has made significant progress in wind energy *** the most advantageous rotary TENG among wind energy harvesters,the severe material wear and the output that fluctuates with wind speed seriously hinder the application of TENG wind energy *** this study,we propose a round-trip oscillation triboelectric nanogenerator(RTO-TENG)consisting of a crank transmission mechanism and a power generation *** RTO-TENG utilizes a simple crank transmission mechanism combined with a zigzag-laminated triboelectric nanogenerator(Z-TENG)to achieve high-performance constant output and low material *** crank transmission mechanism can realize the transformation from circular motion to arc reciprocating motion,converting the random wind energy into bi-directional kinetic energy,driving the vertical contact and separation of the *** to the low transmission ratio(1:1)of the crank transmission mechanism and the consistent frequency of the Z-TENG contact–separation with that of the pendulum,the RTO-TENG’s power generation unit(10 Z-TENGs)is insensitive to changes in wind speed,resulting in a constant and stable output response at various *** 480,000 cycles,the output of RTO-TENG decreased by only 0.9%compared to the initial value of 6μC,and the scanning electron microscopy(SEM)images of the polytetrafluoroethylene(PTFE)film showed no significant wear on the surface of the friction layer,demonstrating excellent output stability and abrasion resistance of the RTO-TENG wind energy collector’s *** equipped energy management module,based on a gas discharge tube switch,can further enhance the output performance of the *** optimizing its inductor parameter L to match the load capacitor,it can charge a 220μF load capacitor to 13.4 V in 40 s,resulting in a 298%improvement in charging speed compared to the voltage of 4.48 V without the management ***,the RTO-TENG can efficiently provide power t

关键词： triboelectric nanogenerator wind energy harvesting round-trip oscillation structure bi-directional kinetic energy gas discharge tube switch

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Bionic iontronics based on nano-confined structures

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Nano Research 2023年第9期16卷 11718-11730页

作者： Han Qian Di Wei Zhong Lin Wang beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

The Moore’s law in silicone-based electronics is reaching its limit and the energy efficiency of the most sophisticated electronics to mimic the iontronic logic circuit in single-celled organisms is still inferior to their natural *** electronics,iontronics is widely present in nature,and provides the fundamentals for many life activities through the transmission and conversion of information and energy via ***,as nanotechnology and fabrication processes continue to advance,highly efficient iontronics could be enabled by creation of asymmetry from nano-confined unipolar ion transport through various nanohierarchical structures of *** introduction of bionic design and nanostructures has made it possible for ions to demonstrate numerous anomalous behaviours and entirely new mechanisms,which are governed by complex interfacial *** this review,we discuss the origins,development,mechanism,and applications of bionic iontronics and analyze the unique benefits as well as the practicality of iontronics from a variety of ***,as an emerging field of research with innumerable challenges and opportunities for exploring the theory and applications of ions as transport carriers,promises to provide new insights in many subjects covering energy and sensing,etc.,and establishes a new paradigm in investigating the ionic-electric signal transduction interface for futuristic iontronic logic circuit and neuromorphic computing.

关键词： iontronics electronics nano-confined ion transport nanofluidic asymmetry

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Modeling and optimization of a spherical triboelectric generator

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Nano Research 2023年第9期16卷 11925-11931页

作者： Jens Gravesen Morten Willatzen Jiajia Shao Zhong Lin Wang DTU Compute Technical University of DenmarkKgs.LyngbyDK-2800Denmark beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400China Georgia institute of Technology AtlantaGeorgia 30332USA

A detailed geometric analysis of spherical triboelectric nanogenerators is *** comparison with earlier works on spherical triboelectric generators,the general case where the moving dielectric rolls on the inside surface of the larger sphere of the TENG is discussed in terms of maximum energy *** optimization analysis of geometrical parameters allows various cases of electrode geometry,either in the form of a spherical circle,spherical ellipse,spherical rectangle,or spherical isosceles trapezium,to be *** analytical insight and computational effective models provided by differential geometry make the mathematical model superior compared to standard three-dimensional(3D)numerical methods.

关键词： spherical triboelectric nanogenerator differential geometry analysis electrode shape study modeling and optimization

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Recent Advances in Single-Atom Electrocatalysts for Oxygen Reduction Reaction

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Research 2020年第1期2020卷 1847-1897页

作者： Junxing Han Juanjuan Bian Chunwen Sun CAS Center for Excellence in Nanoscience Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Oxygen reduction reaction(ORR)plays significant roles in electrochemical energy storage and conversion systems as well as clean synthesis of fine ***,the ORR process shows sluggish kinetics and requires platinum-group noble metal catalysts to accelerate the *** high cost,rare reservation,and unsatisfied durability significantly impede large-scale commercialization of platinum-based ***-atom electrocatalysts(SAECs)featuring with well-defined structure,high intrinsic activity,and maximum atom efficiency have emerged as a novel field in electrocatalytic science since it is promising to substitute expensive platinum-group noble metal ***,finely fabricating SAECs with uniform and highly dense active sites,fully maximizing the utilization efficiency of active sites,and maintaining the atomically isolated sites as single-atom centers under harsh electrocatalytic conditions remain urgent *** this review,we summarized recent advances of SAECs in synthesis,characterization,oxygen reduction reaction(ORR)performance,and applications in ORR-related H_(2)O_(2)production,metal-air batteries,and low-temperature fuel *** progress on tailoring the coordination structure of isolated metal centers by doping other metals or ligands,enriching the concentration of single-atom sites by increasing metal loadings,and engineering the porosity and electronic structure of the support by optimizing the mass and electron transport are also ***,general strategies to synthesize SAECs with high metal loadings on practical scale are highlighted,the deep learning algorithm for rational design of SAECs is introduced,and theoretical understanding of active-site structures of SAECs is discussed as *** on future directions and remaining challenges of SAECs are presented.

关键词： platinum Oxygen centers

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Enhanced NO_2 gas sensing of a single-layer MoS_2 by photogating and piezo-phototronic effects

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Science Bulletin 2019年第2期64卷 128-135页

作者： Junmeng Guo Rongmei Wen Junyi Zhai Zhong Lin Wang CAS Center for Excellence in Nanoscience Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences School of Nanoscience and Technology University of Chinese Academy of Sciences Center on nanoenergy Research School of Physical Science and Technology Guangxi University School of Materials Science and Engineering Georgia Institute of Technology

NO_2 sensors with ultrahigh sensitivity are demanded for future electronic sensing systems. However,traditional sensors are considerably limited by the relative low sensitivity, high cost and complicated process. Here, we report a simply and reliable flexible NO_2 sensor based on single-layer MoS_2. The flexible sensor exhibits high sensitivity to NO_2 gas due to ultra-large specific surface area and the nature of two-dimensional(2 D) semiconductor. When the NO_2 is 400 ppb(parts per billion), compared with the dark and strain-free conditions, the sensitivity of the single-layer sensor is enhanced to 671% with a625 nm red light-emitting diode(LED) illumination of 4 mW/cm^2 power under 0.67% tensile *** important, the response time is dramatically reduced to $16 s and it only needs $65 s to complete90% recovery. A theoretical model is proposed to discuss the microscopic mechanisms. We find that the remarkable sensing characteristics are the result of coupling among piezoelectricity, photoelectricity and adsorption-desorption induced charges transfer in the single-layer MoS_2 Schottky junction based *** work opens up the way to further enhancements in the sensitivity of gas sensor based on single-layer MoS_2 by introducing photogating and piezo-phototronic effects in mesoscopic systems.

关键词： Ultrahigh sensitivity Flexible NO2 sensor Single-layer MoS2 Photogating effect Piezo-phototronic effect

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Recent advances in high-performance triboelectric nanogenerators

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Nano Research 2023年第9期16卷 11698-11717页

作者： Di Liu Yikui Gao Linglin Zhou Jie Wang Zhong Lin Wang beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400China College of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

The development of the Internet of Things(IoT)and artificial intelligence has accompanied the evolution of energy demand and structure in the new era,and the power sources for billions of distributed electronics and sensors have aroused worldwide *** an alternative energy harvesting technology,triboelectric nanogenerators(TENGs)have received remarkable attention and have shown attractive potential applications for use in micro/nano power sources,self-powered sensors,highvoltage power sources,and blue energy due to their advantages of small size,light weight,flexibility,low cost,and high efficiency at low *** this review,we discuss high-performance TENGs from the perspectives of triboelectric charge density,output voltage,energy density,and corresponding quantification *** these topics,the limitations,optimization methods and techniques,and potential directions to challenge these limits are comprehensively discussed and ***,we discuss the emerging challenges,strategies,and opportunities for research and development of highperformance TENGs.

关键词： high-performance triboelectric nanogenerator(TENG) charge density voltage energy density average power density

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Single-material-substrated triboelectric–electromagnetic hybrid generator for self-powered multifunctional sensing in intelligent greenhouse

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Nano Research 2023年第2期16卷 3149-3155页

作者： Baosen Zhang Wenbo Li Jianwei Ge Chenggen Chen Xin Yu Zhong Lin Wang Tinghai Cheng beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332-0245USA

The environmental micro-energy harvested by the triboelectric–electromagnetic hybrid generator(TEHG)can power sensors and Internet of Things(IoT)nodes in smart ***,the separation structure of traditional TEHG raises the complexity of form and material,which is harmful to the miniaturization of the ***,a single-material-substrated triboelectric–electromagnetic hybrid generator(SMS-TEHG)based on the flexible magnets is designed to achieve the structural integration of triboelectric nanogenerator(TENG)and electromagnetic generator(EMG).The flexible magnets serve as the electropositive triboelectric materials for TENG and the magnetic materials for EMG,simplifying the structural complexity of *** open-circuit voltage(VOC)of the TENG and EMG are 187.2 and 9.0 V at 300 rpm,*** 30,000 cycles of stability testing,the VOC of the TENG and EMG retain about 95.6%and 99.3%,***,the self-powered applications driven by SMS-TEHG in intelligent greenhouse have been successfully demonstrated,such as crop light supplementation,rain monitoring,and wireless temperature and humidity *** work provides a new design for TEHG and possibilities for applying TEHG and IoT in smart agriculture.

关键词： triboelectric–electromagnetic hybrid generator single-material-substrated wind energy harvesting self-powered smart agriculture

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A novel interface circuit for triboelectric nanogenerator

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Journal of Semiconductors 2017年第10期38卷 96-100页

作者： Wuqi Yu Jiahao Ma Zhaohua Zhang Tianling Ren University of Chinese Academy of Sciences beijing institute of nanoenergy and nanosystems Chinese Academy of Sciences institute of Microelectronics Tsinghua University

For most triboelectric nanogenerators（TENGs）,the electric output should be a short AC pulse,which has the common characteristic of high voltage but low *** it is necessary to convert the AC to DC and store the electric energy before driving conventional *** traditional AC voltage regulator circuit which commonly consists of transformer,rectifier bridge,filter capacitor,and voltage regulator diode is not suitable for the TENG because the transformer＇s consumption of power is appreciable if the TENG output is *** article describes an innovative design of an interface circuit for a triboelectric nanogenerator that is transformerless and easily *** circuit consists of large-capacity electrolytic capacitors that can realize to intermittently charge lithium-ion batteries and the control section contains the charging chip,the rectifying circuit,a comparator chip and switch *** important,the whole interface circuit is completely self-powered and ***,the chip is widely used in the circuit,so it is convenient to integrate into *** short,this work presents a novel interface circuit for TENGs and makes progress to the practical application and industrialization of nanogenerators.

关键词： energy harvesting triboelectric nanogenerator(TENG) self-powered lithium-ion battery

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Theoretical foundations of triboelectric nanogenerators(TENGs)

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Science China(Technological Sciences) 2020年第7期63卷 1087-1109页

作者： SHAO JiaJia JIANG Tao WANG ZhongLin beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Materials Science and Engineering Georgia Institute of TechnologyAtlanta GA 30332-0245USA

Triboelectric nanogenerator(TENG) is an emerging powerful technology for converting ambient mechanical energy into electrical energy through the effect of triboelectricity. Starting from the expanded Maxwell’s equations, the theoretical framework of TENGs has been gradually established. Here, a review is given about its recent progress in constructing of this general theory. The fundamental mechanism of TENGs is constructed by the driving force—Maxwell’s displacement current, which is essentially different from that of electromagnetic generators. Theoretical calculations of the displacement current from a threedimensional mathematical model are presented, as well as the theoretical studies on the TENGs according to the capacitor models. Furthermore, the figure-of-merits and standards for quantifying the TENG’s output characteristics are discussed, which will provide important guidelines for optimizing the structure and performance of TENGs toward practical applications. Finally,perspectives and challenges are proposed about the basic theory of TENGs and its future technology development.

关键词： triboelectric nanogenerator theoretical foundations displacement current three-dimensional model capacitor model figure-of-merits

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Intelligent electronic passworded locker with unique and personalized security barriers for home security

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Nano Research 2023年第5期16卷 7568-7574页

作者： Xiaoqing Huo Xuelian Wei Baocheng Wang Xiaole Cao Jiahui Xu Jiaxin Yin Zhiyi Wu Zhong Lin Wang beijing institute of nanoenergy and nanosystems Chinese Academy of SciencesBeijing 101400China College of Nanoscience and Technology University of Chinese Academy of ScienceBeijing 100049China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

As a widely used security device,the electronic passworded locker is designed to protect personal property and ***,once the password is leaked to an unauthorized person,its security is ***,with the assistance of triboelectric nanogenerators(TENGs),we present an intelligent electronic passworded locker(IEPL)based on unique and personalized security barriers,which can accurately extract users’habits of entering passwords through integrated deep *** key of the IEPL adopts the single electrode mode of TENG that accurately recognizes the input behavior of a person based on machine learning,which serves as a reliable,unique,unreproducible gate,with advantages of thin thickness,diversified structure,and simple preparation ***,the proposed IEPL offers a reliable solution for improving the overall security of passworded lockers and extending the application of TENG-based sensors in the smart home.

关键词： smart home triboelectric nanogenerator deep learning intelligent electronic passworded locker unique and personalized security barriers

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