Improving energy conversion efficiency for triboelectric nanogenerator with capacitor structure by maximizing surface charge density

Nanoscale ◽  
2015 ◽  
Vol 7 (5) ◽  
pp. 1896-1903 ◽  
Author(s):  
Xianming He ◽  
Hengyu Guo ◽  
Xule Yue ◽  
Jun Gao ◽  
Yi Xi ◽  
...  
Keyword(s):  
Charge Density ◽  
Energy Conversion ◽  
Surface Charge ◽  
Conversion Efficiency ◽  
Carbon Nanoparticles ◽  
Surface Charge Density ◽  
Energy Conversion Efficiency ◽  
Triboelectric Nanogenerator ◽  
Capacitor Structure ◽  
Dielectric Polymer

The charge density on a dielectric polymer is determined by capacitance and can be maximized by mixing the polymer with some carbon nanoparticles.

A multi-dielectric-layered triboelectric nanogenerator as energized by corona discharge

Nanoscale ◽  
2017 ◽  
Vol 9 (27) ◽  
pp. 9668-9675 ◽  
Author(s):  
Jia Jia Shao ◽  
Wei Tang ◽  
Tao Jiang ◽  
Xiang Yu Chen ◽  
Liang Xu ◽  
...  
Keyword(s):  
Charge Density ◽  
Surface Charge ◽  
Corona Discharge ◽  
Surface Charge Density ◽  
High Surface ◽  
Cycling Stability ◽  
Triboelectric Nanogenerator ◽  
Excellent Cycling Stability ◽  
Vertical Contact ◽  
High Surface Charge Density

A multi-dielectric-layered vertical contact-separation mode TENG through a corona discharge approach results in outstanding output performances, i.e., a high surface charge density of 283 μC m−2 and excellent cycling stability (92.6% retention after 200 000 cycles).

Boosting the energy conversion efficiency of a combined triboelectric nanogenerator-capacitor

Nano Energy ◽  
2019 ◽  
Vol 56 ◽  
pp. 571-580 ◽  
Author(s):  
Jin Pyo Lee ◽  
Jae Won Lee ◽  
Bo-Kyung Yoon ◽  
Hee Jae Hwang ◽  
Sungwoo Jung ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
Triboelectric Nanogenerator

scholarly journals Rationally patterned electrode of direct-current triboelectric nanogenerators for ultrahigh effective surface charge density

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhihao Zhao ◽  
Yejing Dai ◽  
Di Liu ◽  
Linglin Zhou ◽  
Shaoxin Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Charge Density ◽  
Surface Charge ◽  
Direct Current ◽  
Surface Charge Density ◽  
Large Scale ◽  
Triboelectric Nanogenerator ◽  
Electrode Structure ◽  
Effective Surface ◽  
Self Powered

AbstractAs a new-era of energy harvesting technology, the enhancement of triboelectric charge density of triboelectric nanogenerator (TENG) is always crucial for its large-scale application on Internet of Things (IoTs) and artificial intelligence (AI). Here, a microstructure-designed direct-current TENG (MDC-TENG) with rationally patterned electrode structure is presented to enhance its effective surface charge density by increasing the efficiency of contact electrification. Thus, the MDC-TENG achieves a record high charge density of ~5.4 mC m−2, which is over 2-fold the state-of-art of AC-TENGs and over 10-fold compared to previous DC-TENGs. The MDC-TENG realizes both the miniaturized device and high output performance. Meanwhile, its effective charge density can be further improved as the device size increases. Our work not only provides a miniaturization strategy of TENG for the application in IoTs and AI as energy supply or self-powered sensor, but also presents a paradigm shift for large-scale energy harvesting by TENGs.

scholarly journals High Performance Temperature Difference Triboelectric Nanogenerator

2020 ◽  
Author(s):  
Bolang Cheng ◽  
Qi Xu ◽  
Yaqin Ding ◽  
Suo Bai ◽  
Xiaofeng Jia ◽  
...  
Keyword(s):  
High Temperature ◽  
Charge Density ◽  
Surface Charge ◽  
Temperature Difference ◽  
Surface Charge Density ◽  
Thermionic Emission ◽  
Triboelectric Nanogenerator ◽  
Emission Model ◽  
Continuous Increase ◽  
Output Performance

Abstract Usually, high temperature decreases the output performance of triboelectric nanogenerator (TENG) because of the dissipation of triboelectric charges through the thermionic emission. It would be highly valuable if the high temperature can be used to enhance the output performance of TENG. In this paper, through a simulation combining the electron-cloud-potential-well model for triboelectrification and the thermionic-emission model, we find that there exists an optimum temperature difference ∆T between friction layers under which the output of TENG is maximum. Based on this, a type of contact-separation temperature difference TENG with controllable friction layer temperature (TDNG) is designed and fabricated to enhance the electrical output performance in temperature difference environment. As the temperature difference ∆T increasing from 0 K to 145 K, the output voltage, current, the surface charge density and output power are increased 2.7, 2.2, 3.0 and 2.9 times, respectively (from 315 V, 9.1 μA, 47 nC/m2, 69 μW to 858 V, 20 μA, 0.14 μC/m2, 206.7 μW). Then with the continuous increase of ∆T to 219 K, the surface charge density and output performance gradually decrease. At the optimal temperature difference (145 K), the biggest output current density (396 μA/cm2) has been obtained, which is 13% larger than the reported record value (350 μA/cm2).

Tailoring Membrane Nanostructure and Charge Density for High Electrokinetic Energy Conversion Efficiency

ACS Nano ◽  
2016 ◽  
Vol 10 (2) ◽  
pp. 2415-2423 ◽  
Author(s):  
Sofie Haldrup ◽  
Jacopo Catalano ◽  
Mogens Hinge ◽  
Grethe V. Jensen ◽  
Jan S. Pedersen ◽  
...  
Keyword(s):  
Charge Density ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency

Improving the surface charge density of a contact-separation-based triboelectric nanogenerator by modifying the surface morphology

2016 ◽  
Vol 159 ◽  
pp. 102-107 ◽  
Author(s):  
M.A. Parvez Mahmud ◽  
JaeJong Lee ◽  
GeeHong Kim ◽  
HyungJun Lim ◽  
Kee-Bong Choi
Keyword(s):  
Surface Morphology ◽  
Charge Density ◽  
Surface Charge ◽  
Surface Charge Density ◽  
Triboelectric Nanogenerator

Electrokinetic Energy Conversion in Conical Nanochannels: Regulation Effect due to Conicity

2019 ◽  
Author(s):  
Fang Qian ◽  
Deng Huang ◽  
Wenyao Zhang ◽  
Wenbo Li ◽  
Qiuwang Wang ◽  
...  
Keyword(s):  
Charge Density ◽  
Energy Conversion ◽  
Surface Charge ◽  
Pressure Difference ◽  
Surface Charge Density ◽  
Electrical Power ◽  
Applied Pressure ◽  
Streaming Potential ◽  
Clean Energy ◽  
Navier Stokes Equation

Abstract Electrokinetic energy conversion being a promising clean energy production technology utilizes the electric double layer (EDL) in a nanochannel to convert hydrodynamic energy to electrical power. The previous research mainly focuses on the electrokinetic energy conversion in straight nanochannels. In this work, we perform a systematic investigation of electrokinetic energy conversion in a conical nanochannel. For this purpose, a multiphysical model consisting of the Planck-Nernst-Poisson equation and Navier-Stokes equation was formulated and solved numerically. Particularly, we discover various regulation effects in the electrokinetic energy conversion in conical nanochannels that the energy conversion characteristics (streaming potential, streaming current and I-V characteristics) are different for a forward pressure difference and a backward pressure difference of the same magnitude. These regulation effects are found to be caused by the conicity of channel. Then the effects of the channel conicity, applied pressure difference and the surface charge density on the performance of electrokinetic energy conversion are discussed in details. It is generally shown that the regulation effects are enhanced by increasing the conicity, pressure difference and surface charge density. The conclusions from this work can serve as important reference and guidelines for the design and operation of electrokinetic energy conversion devices.

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