Session: 01-02-01: General

Paper Number: 72153

Start Time: Tuesday, 10:55 AM

72153 - Multi-Functional Metamaterials Based Triboelectric Nanogenerators 

In recent years, a great deal of research has been conducted on acoustic/elastic metamaterials exhibiting unusual dynamic effective material properties produced by artificially engineered microstructures. In general, it is hard to continuously power micro electric devices, sensors, and wireless telecommunication systems. However, all of these devices mentioned above are important in structural health monitoring and environmental monitoring. Therefore, designing an energy harvester to satisfy the needs of electric energy completely or partially by harvesting energy from the environment is a very attractive solution. The ambient energy, such as airflow, water waves (river and ocean), mechanical and human motions, is abundant and exploitable. For example, to harvest random vibrational energy in multiple directions over a wide bandwidth, a three-dimensional triboelectric nanogenerator was designed, analyzed and tested experimentally . Besides, introducing a mechanical spring-based amplifier and coupling two picking-up vibration structures, two types of TENGs were engineered to improve the vibration energy harvesting efficiency in the low-frequency region . Niu et al.  proposed a theoretical model and derived an analytical relationship for a lateral sliding-mode triboelectric nanogenerator. Based on such a theoretical model, Salauddin et al.  proposed a hybrid energy harvester to harvest human-induced vibration energy. Yang et al.  also proposed a sliding-mode triboelectric nanogenerator, which was utilized to power a sensor that could detect the speed along one direction.  While all of these studies are focused on the TENG performance, barely see the designed TENG has multi-functional behavior. Interestingly, as we know, metamaterials are very efficient and famous for dealing with vibration-related problems, which has been remarkably developed in the last 15 years. The primary components in the design of metamaterials are locally resonant inclusions at subwavelength scales such that the acoustic/elastic metamaterial can be regarded as an effective continuum media exhibiting, for example, negative effective mass density and/or negative effective moduli . The design approach based on the local resonance mechanism sheds new light on the low-frequency mechanical wave and/or vibration attenuation with compelling advantages compared with conventional methods, where large or heavy materials/structures are usually involved.

In this paper, we proposed a Multi-Functional-Metamaterial base TENG (MFM-TENG) to achieve mechanical energy harvesting and elastic wave mitigation. The general idea of this design is to develop a contact-separate type TENG that can be arranged on the plate to mitigate the wave or vibration. First of all, the general linear and nonlinear contact mechanical model and combine mechanism between the mechanical and electrical field of MFM-TENG have been developed. The theoretical model has also been verified by FEM simulation. Thus, to obtain analytical dynamic responses of designed MFM -TENG, the general effect of geometry and material properties with different frequencies has been obtained, meanwhile, the elastic wave mitigation of MFM -TENG has also been simulated. To obtain analytical dynamic responses of designed MFM -TENG, the general effect of geometry and material properties with different frequencies has been obtained, meanwhile, the elastic wave mitigation of MFM -TENG has also been simulated. Finally, the energy harvesting and wave mitigation performance of MFM -TENG at low-frequency range have been experimentally demonstrated.This work provides an insightful theory of a meta-mechanism to harvest the vibration energy by combining a TENG, which can be used to design the new multi-functional MFM -TENG.

Presenting Author: Xianchen Xu University of Missouri

Authors:

Xianchen Xu University of Missouri
Changyong Cao Michigan State University
Guoliang Huang University of Missouri