High output direct-current power fabrics based on the air breakdown effect

2021 ◽  
Vol 14 (4) ◽  
pp. 2460-2471
Author(s):  
Renwei Cheng ◽  
Kai Dong ◽  
Pengfei Chen ◽  
Chuan Ning ◽  
Xiao Peng ◽  
...  
Keyword(s):  
Direct Current ◽  
Air Breakdown ◽  
High Output

The finger-sized FDC-TENG can light up 99 commercial bulbs and 1053 LEDs and drive watches and calculators easily and directly by sliding it manually.

Theoretical investigation of air breakdown direct current triboelectric nanogenerator

2020 ◽  
Vol 116 (26) ◽  
pp. 263901
Author(s):  
Sixing Xu ◽  
Hengyu Guo ◽  
Steven L. Zhang ◽  
Long Jin ◽  
Wenbo Ding ◽  
...  
Keyword(s):  
Theoretical Investigation ◽  
Direct Current ◽  
Triboelectric Nanogenerator ◽  
Air Breakdown

scholarly journals Polarized Water Driven Dynamic PN Junction-Based Direct-Current Generator

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-10 ◽  
Author(s):  
Yanghua Lu ◽  
Yanfei Yan ◽  
Xutao Yu ◽  
Xu Zhou ◽  
Sirui Feng ◽  
...  
Keyword(s):  
Direct Current ◽  
Dielectric Medium ◽  
Potential Candidate ◽  
Distributed Sensors ◽  
Flow Energy ◽  
Portable Power ◽  
Current Voltage ◽  
Direct Current Voltage ◽  
High Output

There is a rising prospective in harvesting energy from the environment, as in situ energy is required for the distributed sensors in the interconnected information society, among which the water flow energy is the most potential candidate as a clean and abundant mechanical source. However, for microscale and unordered movement of water, achieving a sustainable direct-current generating device with high output to drive the load element is still challenging, which requires for further exploration. Herein, we propose a dynamic PN water junction generator with moving water sandwiched between two semiconductors, which outputs a sustainable direct-current voltage of 0.3 V and a current of 0.64 μA. The mechanism can be attributed to the dynamic polarization process of water as moving dielectric medium in the dynamic PN water junction, under the Fermi level difference of two semiconductors. We further demonstrate an encapsulated portable power-generating device with simple structure and continuous direct-current voltage output of 0.11 V, which exhibits its promising potential application in the field of wearable devices and the IoTs.

scholarly journals Compact dual-band RF rectifier for wireless energy harvesting using CRLH technique

2021 ◽  
Vol 24 (1) ◽  
pp. 338
Author(s):  
Marwa Jasim Alhily ◽  
Nasr Al-Khafaji ◽  
Salim Wadi
Keyword(s):  
Energy Harvesting ◽  
Band Structure ◽  
Direct Current ◽  
Transmission Lines ◽  
Dual Band ◽  
Left Handed ◽  
Low Profile ◽  
Lumped Elements ◽  
Wireless Energy Harvesting ◽  
High Output

<p>In this paper, a new dual-band radio frequency (RF) rectifier was designed. The proposed design is a low-profile structure with dimensions of <br /> 5×5.5 mm<sup>2</sup> owing to the use of lumped elements rather than the conventional transmission lines which occupy large footprints. This property can be potentially exploited to use the proposed rectifier in high dense rectenna arrays to generate high output direct current (DC) voltages. Furthermore, the proposed design adopts the composite right/left-handed composite right left-handed (CRLH) technique to realize the dual-band structure at frequencies of 1.8 and 2.4 GHz. Afterward, the matching circuit was optimized to make sure that it offers good matching. The frequency response shows good matching at both bands which are about -22 and -25 dB respectively. Eventually, the simulated circuit has a conversion efficiency of 52% and output voltages of 0.5 V at -5 dBm for the two bands.</p>

scholarly journals High performance floating self-excited sliding triboelectric nanogenerator for micro mechanical energy harvesting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Li Long ◽  
Wenlin Liu ◽  
Zhao Wang ◽  
Wencong He ◽  
Gui Li ◽  
...  
Keyword(s):  
Charge Density ◽  
High Performance ◽  
Mechanical Energy ◽  
Triboelectric Nanogenerator ◽  
Maximum Charge ◽  
Charge Decay ◽  
Air Breakdown ◽  
Weak Wind ◽  
Breakdown Model ◽  
High Output

AbstractNon-contact triboelectric nanogenerator (TENG) enabled for both high conversion efficiency and durability is appropriate to harvest random micro energy owing to the advantage of low driving force. However, the low output (<10 μC m−2) of non-contact TENG caused by the drastic charge decay limits its application. Here, we propose a floating self-excited sliding TENG (FSS-TENG) by a self-excited amplification between rotator and stator to achieve self-increased charge density, and the air breakdown model of non-contact TENG is given for a maximum charge density. The charge density up to 71.53 μC m−2 is achieved, 5.46 times as that of the traditional floating TENG. Besides, the high output enables it to continuously power small electronics at 3 m s−1 weak wind. This work provides an effective strategy to address the low output of floating sliding TENG, and can be easily adapted to capture the varied micro mechanical energies anywhere.

scholarly journals Direct-Current Triboelectric Nanogenerator Realized by Air Breakdown Induced Ionized Air Channel

2018 ◽  
Vol 8 (27) ◽  
pp. 1800889 ◽  
Author(s):  
Jianjun Luo ◽  
Liang Xu ◽  
Wei Tang ◽  
Tao Jiang ◽  
Feng Ru Fan ◽  
...  
Keyword(s):  
Direct Current ◽  
Triboelectric Nanogenerator ◽  
Air Channel ◽  
Air Breakdown ◽  
Ionized Air

Inter-Method Reliability of Pulse Volume Related Measures Derived Using Finger-Photoplethysmography

2018 ◽  
Vol 32 (4) ◽  
pp. 182-190 ◽  
Author(s):  
Kenta Matsumura ◽  
Koichi Shimizu ◽  
Peter Rolfe ◽  
Masanori Kakimoto ◽  
Takehiro Yamakoshi
Keyword(s):  
Light Intensity ◽  
Adverse Effects ◽  
Light Source ◽  
Direct Current ◽  
Resting State ◽  
Current Component ◽  
Psychophysiological Measures ◽  
Pulse Volume ◽  
Optical Paths ◽  
Sensor Positions

Abstract. Pulse volume (PV) and its related measures, such as modified normalized pulse volume (mNPV), direct-current component (DC), and pulse rate (PR), derived from the finger-photoplethysmogram (FPPG), are useful psychophysiological measures. Although considerable uncertainties exist in finger-photoplethysmography, little is known about the extent of the adverse effects on the measures. In this study, we therefore examined the inter-method reliability of each index across sensor positions and light intensities, which are major disturbance factors of FPPG. From the tips of the index fingers of 12 participants in a resting state, three simultaneous FPPGs having overlapping optical paths were recorded, with their light intensity being changed in three steps. The analysis revealed that the minimum values of three coefficients of Cronbach’s α for ln PV, ln mNPV, ln DC, and PR across positions were .948, .850, .922, and 1.000, respectively, and that those across intensities were .774, .985, .485, and .998, respectively. These findings suggest that ln mNPV and PR can be used for psychophysiological studies irrespective of minor differences in sensor attachment positions and light source intensity, whereas and ln DC can also be used for such studies but under the condition of light intensity being fixed.

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