Dynamical charge transfer model for high surface charge density triboelectric nanogenerators

Cui, Xin; Zhang, Yaming; Hu, Gongwei; Zhang, Lu; Zhang, Yan

doi:10.1016/j.nanoen.2020.104513

Cited by 38 publications

(32 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface charge density of TENG is originated from the dynamic balance between charge accumulation and charge decay processes ( Figure 1). [8,32,38] The maximum average surface charge density (̄) is given by [38] = 1…”

Section: Dynamical Charge Transfer Modelmentioning

confidence: 99%

“…Unlike electrets with steady-state charges, the ultra-high surface charge density of triboelectric materials stems from dynamic charge transfer process, which is a delicate concert among trade-offs between the charge accumulation process and the charge decay process. [32,38] Indeed, the dynamic transfer of charge is crucial in the ultra-high surface charge density scheme of triboelectric materials.…”

Section: General Aspects Of the Triboelectric Materialsmentioning

confidence: 99%

“…The magnitude of the decay coefficient measures the average existence time of the surface charge of the dielectric material. [32,38,42,44] Generally, low conductivity tends to retain surface charge, [8] whereas high temperature effectively enhances the α. [29] To help explain the relationship between the decay coefficient and the ambient temperature and the conductivity of dielectric material, a simple, F I G U R E 5 Functionally gradient mechanism.…”

Section: Decay Coefficientmentioning

confidence: 99%

“…(A) Schematic of a dielectric with a triboelectric layer and a charge storage layer. (B) Schematic of a dielectric with a triboelectric layer, a transport layer and a charge storage layer yet illustrative, formula is presented [38]…”

Section: Decay Coefficientmentioning

confidence: 99%

See 3 more Smart Citations

Dynamical charge transfer for high‐performance triboelectric nanogenerators

Cui

Zhang

2020

Nano Select

Self Cite

View full text Add to dashboard Cite

Triboelectric nanogenerators (TENGs) provide the most effective technology for using distributed mechanical energy to power distributed sensor networks. Improving the surface charge density is important to optimizing the performance of TENGs. Unlike electrets with steady-state charges, there is a changing chargedischarge process in the working cycle for materials for TENGs. This article reviews several mechanisms to improve surface charge density by using decay coefficient, transfer time, and effective charge. These mechanisms decouple the physical quantities of charge decay and charge accumulation processes toward higher surface charge density. We also briefly discuss new strategies for improving surface charge density. K E Y W O R D S charge transfer, decay coefficient transfer time, surface charge density, triboelectric nanogenerator 1 INTRODUCTION For the upcoming internet of things era, triboelectric nanogenerator (TENG) provides an effective and environmentally friendly solution for harvesting distributed mechanical energy to power distributed sensor networks. [1,2] TENG combines contact electrification (CE) and electrostatic induction to convert randomly distributed, irregular, and wasted low-frequency mechanical energy into electrical energy. [3] TENGs are applied to mechanical energy harvesting units of self-powered applications in human motion, walking, talking, typing, mechanical triggering, vibration, wind, flowing water, droplet, or even ocean waves into electrical energy. [1,3-7] Triboelectric charges are generated on different surfaces, and mechanical force convert mechanical energy to electrical This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Section: Dynamical Charge Transfer Modelmentioning

confidence: 99%

Section: General Aspects Of the Triboelectric Materialsmentioning

confidence: 99%

Section: Decay Coefficientmentioning

confidence: 99%

Section: Decay Coefficientmentioning

confidence: 99%

See 2 more Smart Citations

Dynamical charge transfer for high‐performance triboelectric nanogenerators

Cui

Zhang

2020

Nano Select

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, this contact area has nanoscale interfaces that determine the final impact on the TENG’s properties. [ 12–38 ] The separation of these materials induces a dipole moment, which drives the charge (e.g., electrons) transfer by applying an external load onto the nanostructured interfaces of the two triboelectric materials. A TENG as a charge‐pump device could also provide current flow back and forth between the electrodes with a specific frequency to produce an alternating current (AC).…”

Section: Introductionmentioning

confidence: 99%

Toward High‐Performance Triboelectric Nanogenerators by Engineering Interfaces at the Nanoscale: Looking into the Future Research Roadmap

Ahmed

Hassan

Pourrahimi

et al. 2020

Adv Materials Technologies

View full text Add to dashboard Cite

To meet the future need for clean and sustainable energies, there has been considerable interest in the development of triboelectric nanogenerators (TENGs) that scavenge waste mechanical energies. The performance of a TENG at the macroscale is determined by the multifaceted role of surface and interface properties at the nanoscale, whose understanding is critical for the future development of TENGs. Therefore, various protocols from the atomic to the macrolevel for fabrication and tuning of surfaces and interfaces are required to obtain the desired TENG performance. These protocols branch out into three categories: chemical engineering, physical engineering, and structural engineering. Chemical engineering is an affordable and optimal strategy for introducing more surface polarities and higher work functions for the improvement of charge transfer. Physical engineering includes the utilization of surface morphology control, and interlayer interactions, which can enhance the active interfacial area and electron transfer capacity. Structural engineering at the macroscale, which includes device and electrode design/modifications has a considerable effect on the performance of TENGs. Future challenges and promising research directions related to the construction of next‐generation TENG devices, taking into consideration “interfaces” are also presented.

show abstract

Curved Architected Triboelectric Metamaterials: Auxeticity‐Enabled Enhanced Figure‐of‐Merit

Chen,

Shi,

Akbarzadeh

2023

Adv Funct Materials

View full text Add to dashboard Cite

Triboelectric generators are integrated into curved architected materials to realize triboelectric metamaterials that simultaneously harvest electricity from wasted mechanical energy and perform mechanical energy absorption. Novel triboelectric mechanical metamaterials (TMMs) of distance‐changing, angle‐changing, and mixed modes are designed, fabricated, and tested under a cyclic compressive load. The open‐circuit voltage and short‐circuit current of lightweight TMMs are found to be as high as 40 V and 10 nA. The introduced TMMs can effectively harvest energy under loadings from two distinctive directions. A theoretical model for predicting the energy harvesting properties of TMMs is developed, and the role of auxeticity on the energy harvesting figure‐of‐merit (FOMes) is elicited. The introduced TMMs exhibit enhanced FOMes enabled by a decrease in their negative Poisson's ratio and an increase in their resilience. The FOMes of curved architected TMMs surpasses by more than 16 times the FOMes of triboelectric materials with conventional architectures (i.e., triangular, quadrilateral, and hexagonal cell topologies). An intelligent skateboard with integrated TMMs is fabricated as a proof of concept to demonstrate motion sensing, shock‐absorbing, and energy harvesting functionalities of multimodal triboelectric metamaterials. The introduced design strategy for triboelectric metamaterials unlocks their applications in self‐powered and self‐monitoring sports equipment, smart soft robots, and large‐scale energy harvesters.

show abstract

Dynamical charge transfer model for high surface charge density triboelectric nanogenerators

Cited by 38 publications

References 49 publications

Dynamical charge transfer for high‐performance triboelectric nanogenerators

Dynamical charge transfer for high‐performance triboelectric nanogenerators

Toward High‐Performance Triboelectric Nanogenerators by Engineering Interfaces at the Nanoscale: Looking into the Future Research Roadmap

Curved Architected Triboelectric Metamaterials: Auxeticity‐Enabled Enhanced Figure‐of‐Merit

Contact Info

Product

Resources

About