The Experts below are selected from a list of 480369 Experts worldwide ranked by ideXlab platform
Zhong Lin Wang - One of the best experts on this subject based on the ideXlab platform.
-
a highly elastic self charging power system for simultaneously harvesting solar and Mechanical Energy
Nano Energy, 2019Co-Authors: Weixing Song, Zhong Lin Wang, Maoqing Zhang, Xinyuan Li, Ping Cheng, Chunlei Zhang, J WangAbstract:Abstract Developing lightweight, flexible and sustainable power sources is desirable and favorable for wearable electronics with the rapid advancement of portable devices. Here, a highly elastic and sustainable power source is fabricated for harvesting and storing Energy simultaneously from ambient sunshine and human movement. Flexible fiber-shaped dye-sensitized solar cells are smartly integrated with triboelectric nanogenerators and serve as generating set. The supercapacitors as Energy storage devices can store direct current Energy for the solar cells and alternating current Energy from the triboelectric nanogenerators after rectified at the same time. Furthermore, the supercapacitors are easily integrated with generating set due to the same electrode materials with triboelectric nanogenerators. Due to the all flexible devices, the size of the whole power system can be easily tuned and connected with electronic devices to create self-powered wearable electronics.
-
an ultrathin flexible single electrode triboelectric nanogenerator for Mechanical Energy harvesting and instantaneous force sensing
Advanced Energy Materials, 2017Co-Authors: Shu Wen Chen, Zhong Lin Wang, Ning Wang, Magnus WillanderAbstract:The trends in miniaturization of electronic devices give rise to the attention of Energy harvesting technologies that gathers tiny wattages of power. Here this study demonstrates an ultrathin flexible single electrode triboelectric nanogenerator (S-TENG) which not only could harvest Mechanical Energy from human movements and ambient sources, but also could sense instantaneous force without extra Energy. The S-TENG, which features an extremely simple structure, has an average output current of 78 μA, lightening up at least 70 LEDs (light-emitting diode). Even tapped by bare finger, it exhibits an output current of 1 μA. The detection sensitivity for instantaneous force sensing is about 0.947 μA MPa−1. Performances of the device are also systematically investigated under various motion types, press force, and triboelectric materials. The S-TENG has great application prospects in sustainable wearable devices, sustainable medical devices, and smart wireless sensor networks owning to its thinness, light weight, Energy harvesting, and sensing capacities.
-
micro cable structured textile for simultaneously harvesting solar and Mechanical Energy
Nature Energy, 2016Co-Authors: Jun Chen, Zhong Lin Wang, Yi Huang, Nannan ZhangAbstract:Energy harvesting from the environment by portable and flexible power sources can power a variety of devices sustainably. Chen et al. report a hybrid power textile with solar cells and triboelectric nanogenerators that can simultaneously harvest solar and Mechanical Energy.
-
triboelectric pyroelectric piezoelectric hybrid cell for high efficiency Energy harvesting and self powered sensing
Advanced Materials, 2015Co-Authors: Yunlong Zi, Zhong Lin Wang, Jun Chen, Sihong Wang, Jie Wang, Po Kang Yang, Fang YiAbstract:: A triboelectric-pyroelectric-piezoelectric hybrid cell, consisting of a triboelectric nanogenerator and a pyroelectric-piezoelectric nanogenerator, is developed for highly efficient Mechanical Energy harvesting through multiple mechanisms. The excellent performance of the hybrid cell enhances the Energy-harvesting efficiency significantly (by 26.2% at 1 kΩ load resistance), and enables self-powered sensing, which will lead to a variety of advanced applications.
-
A self-charging power unit by integration of a textile triboelectric nanogenerator and a flexible lithium-ion battery for wearable electronics
Advanced Materials, 2015Co-Authors: Xiong Pu, Huanqiao Song, Linxuan Li, Chunhua Du, Weiguo Hu, Zhengfu Zhao, Chunyan Jiang, Guozhong Cao, Zhong Lin WangAbstract:A novel integrated power unit realizes both Energy harvesting and Energy storage by a textile triboelectric nanogenerator (TENG)-cloth and a flexible lithium-ion battery (LIB) belt, respectively. The Mechanical Energy of daily human motion is converted into electricity by the TENG-cloth, sustaining the Energy of the LIB belt to power wearable smart electronics.
Zhong Li Wang - One of the best experts on this subject based on the ideXlab platform.
-
triboelectric nanogenerator by integrating a cam and a movable frame for ambient Mechanical Energy harvesting
Nano Energy, 2019Co-Authors: Zhong Li Wang, Tinghai Cheng, Yicheng Wang, Qi GaoAbstract:Abstract Transform rotary motion triggered by environmental Mechanical Energy (e.g., wind) to electrical Energy is widely used for Energy harvesting. Triboelectric nanogenerators that are used to harvest rotational Mechanical Energy are mostly based on in-plane sliding or free-standing mode. However, the relative friction between the two contacting triboelectric layers may cause severe abrasion, which reduces the durability of the device and increases the maintenance cost. In this study, we report a combination of a cam and a movable frame for a novel triboelectric nanogenerator (CMF-TENG), which is expected to reduce the abrasion problem and improve the output performance. The cam is designed to transform the rotational motion triggered by ambient Mechanical Energy to linear movement of the movable frame, leading to a contact-separation of the triboelectric layers within each sub-triboelectrification unit of CMF-TENG, thus electric output can be generated. The average electric output from one subunit of the CMF-TENG achieved around 200 V of open-circuit voltage, 2.9 μA of short-circuit current, and 96 nC of transferred charge at the triggered rotational speed of 60 rpm. The power output increase from 180 μW (1 subunit) to around 728 μW when three subunits were connected in parallel. The output voltage of the CMF-TENG remained almost consistent throughout the roughly 8 h continuously operation, suggesting outstanding robustness and durability of the CMF-TENG. The CMF-TENG harvest Energy from wind can light up 113 blue LEDs connected in series at a wind speed of 13.9 m/s with the assistance of a rectifying circuit; and can power a thermometer at the same wind speed condition with the assistance of a rectifying circuit and a capacitor. The results imply that the CMF-TENG can not only be used to harvest Energy from the ambient environment, but also can achieve self-powered sensing. Technically, by using this novel design, additional sub-triboelectrification units can be added to improve the electric output of the entire device and the rotational Mechanical Energy can be harvested more effectively with less abrasion.
-
ultra robust triboelectric nanogenerator for harvesting rotary Mechanical Energy
Nano Research, 2018Co-Authors: Yuebo Liu, Jiaona Wang, Zuqing Yua, Ra Cao, Shuyu Zhao, I Wang, Zhong Li WangAbstract:Triboelectric nanogenerators (TENGs) for harvesting rotary Mechanical Energy are mostly based on in-plane sliding or free-standing mode. However, the relative displacement between two contacting triboelectric layers causes abrasion, which lowers the output power and reduces service life. Therefore, it is important to develop a method to minimize abrasion when harvesting rotary Mechanical Energy. Here, we report a scale-like structured TENG (SL-TENG), in which two triboelectric layers work under a contact-separation mode to avoid in-plane relative sliding in order to minimize abrasion. As a result, the SL-TENG exhibits outstanding robustness. For example, the output voltage of the SL-TENG does not exhibit any measurable decay although this output has been continuously generated through more than a million cycles. Moreover, at a very low rotation rate of 120 rpm, the SL-TENG can generate a maximum short-circuit current of 78 μA, delivering an instantaneous power density of 2.54 W/m2 to an external load. In relation to this, a Li-ion battery was charged using the SL-TENG. After a 30-min charging time, the battery achieved a discharge capacity of 0.1 mAh. Through a power management circuit integrated into the SL-TENG, a continuous direct current (DC) of 5 V is outputted, providing sufficient DC power for driving a radio-frequency wireless sensor and other conventional electronics.
-
rotating sleeve triboelectric electromagnetic hybrid nanogenerator for high efficiency of harvesting Mechanical Energy
ACS Nano, 2017Co-Authors: Ra Cao, Zuqing Yua, I Wang, Tao Zhou, Zhong Li WangAbstract:Currently, a triboelectric nanogenerator (TENG) and an electromagnetic generator (EMG) have been hybridized to effectively scavenge Mechanical Energy. However, one critical issue of the hybrid device is the limited output power due to the mismatched output impedance between the two generators. In this work, impedance matching between the TENG and EMG is achieved facilely through commercial transformers, and we put forward a highly integrated hybrid device. The rotating-sleeve triboelectric–electromagnetic hybrid nanogenerator (RSHG) is designed by simulating the structure of a common EMG, which ensures a high efficiency in transferring ambient Mechanical Energy into electric power. The RSHG presents an excellent performance with a short-circuit current of 1 mA and open-circuit voltage of 48 V at a rotation speed of 250 rpm. Systematic measurements demonstrate that the hybrid nanogenerator can deliver the largest output power of 13 mW at a loading resistance of 8 kΩ. Moreover, it is demonstrated that a win...
-
stretchable porous carbon nanotube elastomer hybrid nanocomposite for harvesting Mechanical Energy
Advanced Materials, 2017Co-Authors: Xian Song Meng, Zhong Li Wang, Shuang Yang Kuang, Lei Zhang, Guang ZhuAbstract:A stretchable porous nanocomposite (PNC) is reported based on a hybrid of a multiwalled carbon nanotubes network and a poly(dimethylsiloxane) matrix for harvesting Energy from Mechanical interactions. The deformation-enabled Energy-generating process makes the PNC applicable to various Mechanical interactions, including pressing, stretching, bending, and twisting. It can be potentially used as an Energy solution for wearable electronics.
-
harvesting low frequency 5 hz irregular Mechanical Energy a possible killer application of triboelectric nanogenerator
ACS Nano, 2016Co-Authors: Zhong Li Wang, Hengyu Guo, Minhsi YehAbstract:Electromagnetic generators (EMGs) and triboelectric nanogenerators (TENGs) are the two most powerful approaches for harvesting ambient Mechanical Energy, but the effectiveness of each depends on the triggering frequency. Here, after systematically comparing the performances of EMGs and TENGs under low-frequency motion ( 10–100 V) and independent of frequency so that most of the generated power can be effectively used to po...
Chi Zhang - One of the best experts on this subject based on the ideXlab platform.
-
remarkable merits of triboelectric nanogenerator than electromagnetic generator for harvesting small amplitude Mechanical Energy
Nano Energy, 2019Co-Authors: Junqing Zhao, Gaowei Zhen, Guoxu Liu, Tianzhao Bu, Wenbo Liu, Xianpeng Fu, Ping Zhang, Chi ZhangAbstract:Abstract Triboelectric nanogenerator (TENG) is a new Energy technology that is as important as traditional electromagnetic generator (EMG) for converting Mechanical Energy into electricity, which shows great advantages of simple structure, high power density and low-frequency. Here, the effects of motion amplitude for both generators are first taken into consideration. Our result demonstrates that the TENG has a much better performance than that of the EMG at small amplitude. Under fixed operation frequency, the maximum output power of the TENG rapidly grows to saturation with the increase of the amplitude, while that of the EMG grows slowly and gradually. This contrastive characteristic is verified at different frequencies, which has demonstrated that the TENG has dominant scope over the EMG, in not only low-frequency but also small-amplitude. Moreover, electronics powered by the TENG in small-amplitude has been exhibited and an overall comparison of the TENG and EMG is summarized. Beyond low-frequency, this work has verified the small-amplitude is also a remarkable merit of the TENG for harvesting micro-Mechanical Energy, which has guided the development prospects of TENG as a foundation of the Energy for the new era for internet of things, wearable electronics, robotics and artificial intelligence.
-
theoretical comparison equivalent transformation and conjunction operations of electromagnetic induction generator and triboelectric nanogenerator for harvesting Mechanical Energy
Advanced Materials, 2014Co-Authors: Chi Zhang, Zhong Lin Wang, Wei Tang, Changbao Han, Fengru FanAbstract:Triboelectric nanogenerator (TENG) is a newly invented technology that is effective using conventional organic materials with functionalized surfaces for converting Mechanical Energy into electricity, which is light weight, cost-effective and easy scalable. Here, we present the first systematic analysis and comparison of EMIG and TENG from their working mechanisms, governing equations and output characteristics, aiming at establishing complementary applications of the two technologies for harvesting various Mechanical energies. The equivalent transformation and conjunction operations of the two power sources for the external circuit are also explored, which provide appropriate evidences that the TENG can be considered as a current source with a large internal resistance, while the EMIG is equivalent to a voltage source with a small internal resistance. The theoretical comparison and experimental validations presented in this paper establish the basis of using the TENG as a new Energy technology that could be parallel or possibly equivalently important as the EMIG for general power application at large-scale. It opens a field of organic nanogenerator for chemists and materials scientists who can be first time using conventional organic materials for converting Mechanical Energy into electricity at a high efficiency.
-
theoretical comparison equivalent transformation and conjunction operations of electromagnetic induction generator and triboelectric nanogenerator for harvesting Mechanical Energy
Advanced Materials, 2014Co-Authors: Chi Zhang, Zhong Li Wang, Wei TangAbstract:Triboelectric nanogenerator (TENG) is a newly invented technology that is effective using conventional organic materials with functionalized surfaces for converting Mechanical Energy into electricity, which is light weight, cost-effective and easy scalable. Here, we present the first systematic analysis and comparison of EMIG and TENG from their working mechanisms, governing equations and output characteristics, aiming at establishing complementary applications of the two technologies for harvesting various Mechanical energies. The equivalent transformation and conjunction operations of the two power sources for the external circuit are also explored, which provide appropriate evidences that the TENG can be considered as a current source with a large internal resistance, while the EMIG is equivalent to a voltage source with a small internal resistance. The theoretical comparison and experimental validations presented in this paper establish the basis of using the TENG as a new Energy technology that could be parallel or possibly equivalently important as the EMIG for general power application at large-scale. It opens a field of organic nanogenerator for chemists and materials scientists who can be first time using conventional organic materials for converting Mechanical Energy into electricity at a high efficiency.
-
complementary power output characteristics of electromagnetic generators and triboelectric generators
Nanotechnology, 2014Co-Authors: Wei Tang, Zhong Lin Wang, Chi ZhangAbstract:Recently, a triboelectric generator (TEG) has been invented to convert Mechanical Energy into electricity by a conjunction of triboelectrification and electrostatic induction. Compared to the traditional electromagnetic generator (EMG) that produces a high output current but low voltage, the TEG has different output characteristics of low output current but high output voltage. In this paper, we present a comparative study regarding the fundamentals of TEGs and EMGs. The power output performances of the EMG and the TEG have a special complementary relationship, with the EMG being a voltage source and the TEG a current source. Utilizing a power transformed and managed (PTM) system, the current output of a TEG can reach as high as 3 mA, which can be coupled with the output signal of an EMG to enhance the output power. We also demonstrate a design to integrate a TEG and an EMG into a single device for simultaneously harvesting Mechanical Energy. In addition, the integrated NGs can independently output a high voltage and a high current to meet special needs.
Wei Tang - One of the best experts on this subject based on the ideXlab platform.
-
theoretical comparison equivalent transformation and conjunction operations of electromagnetic induction generator and triboelectric nanogenerator for harvesting Mechanical Energy
Advanced Materials, 2014Co-Authors: Chi Zhang, Zhong Lin Wang, Wei Tang, Changbao Han, Fengru FanAbstract:Triboelectric nanogenerator (TENG) is a newly invented technology that is effective using conventional organic materials with functionalized surfaces for converting Mechanical Energy into electricity, which is light weight, cost-effective and easy scalable. Here, we present the first systematic analysis and comparison of EMIG and TENG from their working mechanisms, governing equations and output characteristics, aiming at establishing complementary applications of the two technologies for harvesting various Mechanical energies. The equivalent transformation and conjunction operations of the two power sources for the external circuit are also explored, which provide appropriate evidences that the TENG can be considered as a current source with a large internal resistance, while the EMIG is equivalent to a voltage source with a small internal resistance. The theoretical comparison and experimental validations presented in this paper establish the basis of using the TENG as a new Energy technology that could be parallel or possibly equivalently important as the EMIG for general power application at large-scale. It opens a field of organic nanogenerator for chemists and materials scientists who can be first time using conventional organic materials for converting Mechanical Energy into electricity at a high efficiency.
-
theoretical comparison equivalent transformation and conjunction operations of electromagnetic induction generator and triboelectric nanogenerator for harvesting Mechanical Energy
Advanced Materials, 2014Co-Authors: Chi Zhang, Zhong Li Wang, Wei TangAbstract:Triboelectric nanogenerator (TENG) is a newly invented technology that is effective using conventional organic materials with functionalized surfaces for converting Mechanical Energy into electricity, which is light weight, cost-effective and easy scalable. Here, we present the first systematic analysis and comparison of EMIG and TENG from their working mechanisms, governing equations and output characteristics, aiming at establishing complementary applications of the two technologies for harvesting various Mechanical energies. The equivalent transformation and conjunction operations of the two power sources for the external circuit are also explored, which provide appropriate evidences that the TENG can be considered as a current source with a large internal resistance, while the EMIG is equivalent to a voltage source with a small internal resistance. The theoretical comparison and experimental validations presented in this paper establish the basis of using the TENG as a new Energy technology that could be parallel or possibly equivalently important as the EMIG for general power application at large-scale. It opens a field of organic nanogenerator for chemists and materials scientists who can be first time using conventional organic materials for converting Mechanical Energy into electricity at a high efficiency.
-
complementary power output characteristics of electromagnetic generators and triboelectric generators
Nanotechnology, 2014Co-Authors: Wei Tang, Zhong Lin Wang, Chi ZhangAbstract:Recently, a triboelectric generator (TEG) has been invented to convert Mechanical Energy into electricity by a conjunction of triboelectrification and electrostatic induction. Compared to the traditional electromagnetic generator (EMG) that produces a high output current but low voltage, the TEG has different output characteristics of low output current but high output voltage. In this paper, we present a comparative study regarding the fundamentals of TEGs and EMGs. The power output performances of the EMG and the TEG have a special complementary relationship, with the EMG being a voltage source and the TEG a current source. Utilizing a power transformed and managed (PTM) system, the current output of a TEG can reach as high as 3 mA, which can be coupled with the output signal of an EMG to enhance the output power. We also demonstrate a design to integrate a TEG and an EMG into a single device for simultaneously harvesting Mechanical Energy. In addition, the integrated NGs can independently output a high voltage and a high current to meet special needs.
Sihong Wang - One of the best experts on this subject based on the ideXlab platform.
-
triboelectric pyroelectric piezoelectric hybrid cell for high efficiency Energy harvesting and self powered sensing
Advanced Materials, 2015Co-Authors: Yunlong Zi, Zhong Lin Wang, Jun Chen, Sihong Wang, Jie Wang, Po Kang Yang, Fang YiAbstract:: A triboelectric-pyroelectric-piezoelectric hybrid cell, consisting of a triboelectric nanogenerator and a pyroelectric-piezoelectric nanogenerator, is developed for highly efficient Mechanical Energy harvesting through multiple mechanisms. The excellent performance of the hybrid cell enhances the Energy-harvesting efficiency significantly (by 26.2% at 1 kΩ load resistance), and enables self-powered sensing, which will lead to a variety of advanced applications.
-
grating structured freestanding triboelectric layer nanogenerator for harvesting Mechanical Energy at 85 total conversion efficiency
Advanced Materials, 2014Co-Authors: Zhong Li Wang, Sihong Wang, Simiao Niu, Ji Yang, Yanna Xie, Qingshe JingAbstract:A newly-designed triboelectric nanogenerator is demonstrated which is composed of a grating-segmented freestanding triboelectric layer and two groups of interdigitated electrodes with the same periodicity. The sliding motion of the grating units across the electrode fingers can be converted into multiple alternating currents through the external load due to the contact electrification and electrostatic induction. Working in non-contact mode, the device shows excellent stability and the total conversion efficiency can reach up to 85% at low operation frequency.
-
segmentally structured disk triboelectric nanogenerator for harvesting rotational Mechanical Energy
Nano Letters, 2013Co-Authors: Long Lin, Sihong Wang, Yannan Xie, Qingshen Jing, Simiao Niu, Youfan Hu, Zhong Lin WangAbstract:We introduce an innovative design of a disk triboelectric nanogenerator (TENG) with segmental structures for harvesting rotational Mechanical Energy. Based on a cyclic in-plane charge separation between the segments that have distinct triboelectric polarities, the disk TENG generates electricity with unique characteristics, which have been studied by conjunction of experimental results with finite element calculations. The role played by the segmentation number is studied for maximizing output. A distinct relationship between the rotation speed and the electrical output has been thoroughly investigated, which not only shows power enhancement at high speed but also illuminates its potential application as a self-powered angular speed sensor. Owing to the nonintermittent and ultrafast rotation-induced charge transfer, the disk TENG has been demonstrated as an efficient power source for instantaneously or even continuously driving electronic devices and/or charging an Energy storage unit. This work presents ...
-
hybridizing Energy conversion and storage in a Mechanical to electrochemical process for self charging power cell
Nano Letters, 2012Co-Authors: Sihong Wang, Yan Zhang, Zhong Lin WangAbstract:Energy generation and Energy storage are two distinct processes that are usually accomplished using two separated units designed on the basis of different physical principles, such as piezoelectric nanogenerator and Li-ion battery; the former converts Mechanical Energy into electricity, and the latter stores electric Energy as chemical Energy. Here, we introduce a fundamental mechanism that directly hybridizes the two processes into one, in which the Mechanical Energy is directly converted and simultaneously stored as chemical Energy without going through the intermediate step of first converting into electricity. By replacing the polyethylene (PE) separator as for conventional Li battery with a piezoelectric poly(vinylidene fluoride) (PVDF) film, the piezoelectric potential from the PVDF film as created by Mechanical straining acts as a charge pump to drive Li ions to migrate from the cathode to the anode accompanying charging reactions at electrodes. This new approach can be applied to fabricating a sel...
