Nanofiber fabric based ion-gradient-enhanced moist-electric generator with a sustained voltage output of 1.1 volts

2021 ◽  
Author(s):  
Zhaoyang Sun ◽  
Lanlan Feng ◽  
Xian Wen ◽  
Liming Wang ◽  
Xiaohong Qin ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Electric Generator ◽  
Voltage Output ◽  
Ion Gradient ◽  
New Energy ◽  
Electric Generation ◽  
Electric Generators

Moisture-enabled electric generation as an emerging new energy-harvesting technology is one of the most fascinating and promising candidates for supplying renewable and clean power. However, existing moist-electric generators (MEGs) can...

scholarly journals Response Identification in a Vibration Energy-Harvesting System with Quasi-Zero Stiffness and Two Potential Wells

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3926
Author(s):  
Joanna Iwaniec ◽  
Grzegorz Litak ◽  
Marek Iwaniec ◽  
Jerzy Margielewicz ◽  
Damian Gąska ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Recurrence Plot ◽  
Piezoelectric Transducers ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Potential Wells ◽  
Frequency Responses ◽  
Voltage Output ◽  
Quantification Analysis ◽  
Energy Harvesting System

In this paper, the frequency broadband effect in vibration energy harvesting was studied numerically using a quasi-zero stiffness resonator with two potential wells and piezoelectric transducers. Corresponding solutions were investigated for system excitation harmonics at various frequencies. Solutions for the higher voltage output were collected in specific branches of the power output diagram. Both the resonant solution synchronized with excitation and the frequency responses of the subharmonic spectra were found. The selected cases were illustrated and classified using a phase portrait, a Poincaré section, and recurrence plot (RP) approaches. Select recurrence quantification analysis (RQA) measures were used to characterize the discussed solutions.

Effect of aspect ratio of piezoelectric constituents on the energy harvesting performance of magneto-mechano-electric generators

Energy ◽  
2022 ◽  
Vol 239 ◽  
pp. 122078
Author(s):  
Ajeet Kumar ◽  
Sung Hoon Park ◽  
Deepak Rajaram Patil ◽  
Geon-Tae Hwang ◽  
Jungho Ryu
Keyword(s):  
Energy Harvesting ◽  
Aspect Ratio ◽  
Electric Generators

A new energy harvest system with a hula-hoop transformer, micro-generator and interface energy-harvesting circuit

2011 ◽  
Vol 17 (5-7) ◽  
pp. 1025-1036 ◽  
Author(s):  
Paul C.-P. Chao ◽  
C. I. Shao ◽  
C. X. Lu ◽  
C. K. Sung
Keyword(s):  
Energy Harvesting ◽  
Interface Energy ◽  
Energy Harvest ◽  
New Energy

Enhanced magnetic energy harvesting properties of magneto-mechano-electric generator by tailored geometry

2016 ◽  
Vol 109 (9) ◽  
pp. 093901 ◽  
Author(s):  
Venkateswarlu Annapureddy ◽  
Ha Young Lee ◽  
Woon-Ha Yoon ◽  
Hyun-Jae Woo ◽  
Ji-Hye Lee ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Magnetic Energy ◽  
Electric Generator

scholarly journals Design investigation of electromechanical generator for energy harvesting

2019 ◽  
Vol 116 ◽  
pp. 00079
Author(s):  
Nejc Smolar ◽  
Peter Virtič
Keyword(s):  
Energy Harvesting ◽  
Electrical Resistance ◽  
Output Voltage ◽  
Energy Input ◽  
Fill Factor ◽  
Rotational Velocity ◽  
Low Frequency ◽  
Induced Voltage ◽  
Voltage Output ◽  
Cylindrical Form

In this paper designs of electromechanical generator for low frequency energy harvesting have been investigated. Simulation with finite element method has been conducted in order to determine highest output voltage of simple and robust generator consisting of permanent magnet and windings. In first part round magnets have been used in spherical and cylindrical form, benefiting from their ability to roll through winding with almost no mechanical friction inducing voltage in into windings. In the second part spindles with smaller radius than circumference of magnet were added to axis to increase rotational velocity of magnet in ambition to further increase induced voltage. As a result of added spindles and use of different magnet shapes length of winding turn varied and resistance of winding varied with it. To ensure similar conditions, windings have been recalculated to lowest electrical resistance using same fill factor, resulting in less winding turns decreasing induced voltage. In case of same kinetic energy input, higher rotational velocity combined with lower inertia produced higher induced voltage output.

scholarly journals Nanofibers-Based Piezoelectric Energy Harvester for Self-Powered Wearable Technologies

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2697
Author(s):  
Fatemeh Mokhtari ◽  
Mahnaz Shamshirsaz ◽  
Masoud Latifi ◽  
Javad Foroughi
Keyword(s):  
Energy Harvesting ◽  
Output Voltage ◽  
Electrospun Nanofibers ◽  
Cost Effective ◽  
Energy Materials ◽  
Current Output ◽  
Wearable Technologies ◽  
Piezoelectric Energy ◽  
New Energy ◽  
Self Powered

The demands for wearable technologies continue to grow and novel approaches for powering these devices are being enabled by the advent of new energy materials and novel manufacturing strategies. In addition, decreasing the energy consumption of portable electronic devices has created a huge demand for the development of cost-effective and environment friendly alternate energy sources. Energy harvesting materials including piezoelectric polymer with its special properties make this demand possible. Herein, we develop a flexible and lightweight nanogenerator package based on polyvinyledene fluoride (PVDF)/LiCl electrospun nanofibers. The piezoelectric performance of the developed nanogenator is investigated to evaluate effect of the thickness of the as-spun mat on the output voltage using a vibration and impact test. It is found that the output voltage increases from 1.3 V to 5 V by adding LiCl as additive into the spinning solution compared with pure PVDF. The prepared PVDF/LiCl nanogenerator is able to generate voltage and current output of 3 V and 0.5 μA with a power density output of 0.3 μW cm−2 at the frequency of 200 Hz. It is found also that the developed nanogenerator can be utilized as a sensor to measure temperature changes from 30 °C to 90 °C under static pressure. The developed electrospun temperature sensor showed sensitivity of 0.16%/°C under 100 Pa pressure and 0.06%/°C under 220 Pa pressure. The obtained results suggested the developed energy harvesting textiles have promising applications for various wearable self-powered electrical devices and systems.

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