Optimizing energy harvesting performance of cone dielectric elastomer generator based on VHB elastomer

Jiang, Yingjie; Liu, Suting; Zhong, Meilin; Zhang, Liqun; Ning, Nanying

doi:10.1016/j.nanoen.2020.104606

Cited by 70 publications

(53 citation statements)

References 47 publications

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“…Other practical DEG topologies take advantage of out-of-plane deformations of DE membranes. Among them, the conical DEG ( Figure 2d) [40][41][42] consists in a uniformly prestretched annular DEG membrane, clamped on the external perimeter to a fixed ring frame, and on the inner perimeter to a mobile rigid disc. Applying longitudinal forces on the rigid disc deforms the DEG to a conical configuration.…”

Section: Topologiesmentioning

confidence: 99%

“…Recent tests with pure‐shear and conical DEG samples led to densities of 190 and 130 mJ g −1 , respectively. [ 35,42 ] Although the conical and pure‐shear topologies provide similar deformation kinematics and surface stretch ratios, the density obtained by Song et al with pure shear is larger, as a result of larger applied electric fields, [ 35 ] in spite of large strains used by Jiang et al in cone DEG demonstrators. [ 42 ] In both tests, an OT control cycle (Section 3.1.2) was used, so as to efficiently fit the DEG maximum‐energy cycle (Section 2.4).…”

Section: Prototypes and Applicationsmentioning

confidence: 99%

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A Review of Dielectric Elastomer Generator Systems

Moretti

Rosset

Vertechy

et al. 2020

Advanced Intelligent Systems

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Dielectric elastomer generator systems (DEGSs) are a class of electrostatic softtransducers capable of converting oscillating mechanical power from different sources into usable electricity. Over the past years, a diversity of DEGSs has been conceived, integrated, and tested featuring diverse topologies and implementation characteristics tailored on different applications. Herein, the recent advances on DEGSs are reviewed and illustrated in terms of design of hardware architectures, power electronics, and control, with reference to the different application targets, including large-scale systems such as ocean wave energy converters, and small-scale systems such as human motion or ambient vibration energy harvesters. Finally, challenges and perspectives for the advancement of DEGSs are identified and discussed.

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Section: Topologiesmentioning

confidence: 99%

Section: Prototypes and Applicationsmentioning

confidence: 99%

A Review of Dielectric Elastomer Generator Systems

Moretti

Rosset

Vertechy

et al. 2020

Advanced Intelligent Systems

View full text Add to dashboard Cite

show abstract

“…In these applications, mechanical energy from kinetic processes such as human walking, wind, or sea waves is converted to direct electrical current. While demonstration installations have been built for such technologies, it is still necessary to develop methods for material optimization with a focus on specific applications [ 3 ]. Studies conducted in this area have highlighted the fact that natural muscles generate linear motion, while electric motors in industrial robots, consumers, and generators in power plants generate circular motion [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Siloxane Matrix Molecular Weight Influences the Properties of Nanocomposites Based on Metal Complexes and Dielectric Elastomer

Soroceanu¹,

Stiubianu²

2021

Materials

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Siloxane-based elastomers are some of the most sought-after materials for the construction of actuators and equipment for energy harvesting devices. This article focuses on changes of the mechanical (breaking stress, breaking strain, Young’s modulus) and dielectric properties for elastomers prepared with silicones, induced by the variation of molecular weight of the matrix, with three different silicone polymers having 60,000 g/mol, 150,000 g/mol, and 450,000 g/mol (from GPC measurements). Multiple siloxane elastomers were crosslinked with methyltriacetoxysilane using the sol-gel route. The dielectric permittivity values of the elastomers were also enhanced with two different complex structures containing siloxane bond and 3d transition metals as filler materials for polydimethylsiloxane polymers with various molecular weights. The dielectric spectroscopy tests demonstrated a small decrease (5%) for the values of the dielectric permittivity in relation to increased molecular weight of the siloxane polymer, both for samples prepared with pure polymer and for samples with metal complexes. The samples of nanocomposites showed a >50% increase of dielectric permittivity values relative to samples prepared of pure siloxane elastomer. The thermal tests demonstrated that the nanocomposites retained thermal stability similar with samples prepared of pure siloxane elastomer. The behavior under controlled conditions of humidity showed a trend of increased water vapor sorption with increasing molecular weight but an overall hydrophobic stable character of nanocomposites.

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“…4(a) that the COR of the DEM presents an increasing trend as the pre-stretched ratio increases when the impact velocity and input voltage are constants. This can be explained that a larger pre-stretched ratio results in smaller thicknesses during the deformation and recovery process, thus decreasing the energy dissipation [60]. Therefore, a higher rebound height R H can be achieved and the COR is enhanced according to (9).…”

Section: A Impact Experimentsmentioning

confidence: 99%

Investigation on the Impact-Based Energy Conversion of a Dielectric Elastomer Membrane

et al. 2020

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Dielectric elastomer generators (DEGs) provide a new solution for vibrational energy harvesting. Currently, a type of impact-based DEGs, which can harvest energy from ambient vibrations, has been proposed and studied through simulations. However, the energy conversion mechanism and the performance evaluation approach of such impact-based DEGs have not been fully studied yet, thus limiting the reliability of the research on the system design/optimization and performance evaluation. In this paper, a single-sided impact (SSI) model is proposed to reveal the impact-based energy conversion mechanism. Based on this model, a complete four-stage impact process is analyzed to reveal the energy conversion mechanism, and the electrical outputs and energy conversion efficiency are derived as the energy harvesting performance evaluation indexes. To use the developed analytical model to predict the system electrical response accurately, some important parameters including the coefficient of restitution (COR) and largest deflection of the membrane at impacts were obtained experimentally, and the system output voltages at impacts were measured to verify the theoretical approaches in calculating the system electrical outputs and studying the parameters' influences. Furthermore, the influences of the pre-stretched ratio, impact velocity, and input voltage on the system energy harvesting performance are studied through simulations. The research results can provide guidelines to improve the energy harvesting performance of the impact-based DEGs in real applications.

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Optimizing energy harvesting performance of cone dielectric elastomer generator based on VHB elastomer

Cited by 70 publications

References 47 publications

A Review of Dielectric Elastomer Generator Systems

A Review of Dielectric Elastomer Generator Systems

Siloxane Matrix Molecular Weight Influences the Properties of Nanocomposites Based on Metal Complexes and Dielectric Elastomer

Investigation on the Impact-Based Energy Conversion of a Dielectric Elastomer Membrane

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