Research Project: Energy harvesting device with polymer electret for wireless electronic devices

Post.doc, Ph.D. Fei Wang's Project

The emergence of MEMS technology, wireless communications and digital electronics has enabled the fast development of many wireless electronics such as wireless sensor networks (WSN). WSN is low-cost, low-power, and multifunctional sensor nodes that can be used for both military applications and home applications like health monitoring of machines and the human body. Though powerful, WSN indeed has a power supply problem that limits the scale of the networks. Most wireless sensor nodes at present are battery-powered, which would lead to a nightmare to replace and dispose the batteries for these thousands of embedded sensors. A battery-free power source of 10~20mW for each sensor node should be the thorough solution.

 

(a)/english/-/media/Institutter/Nanotech/Research/externally_funded_projects/energy_harvesting_device/billa.ashx  (b)   /english/-/media/Institutter/Nanotech/Research/externally_funded_projects/energy_harvesting_device/billb.ashx

 

 

Figure 1: (a) Comparison of various potential power sources for energy harvesting; (b) System diagram for wireless electronics.

 

The main objective of this project is to develop a small-size energy harvesting device which is compatible with mass-production of WSN. Energy harvesting is the process by which energy is derived from external sources. The energy sources for energy harvesting are basically solar power, radio-frequency (RF) radiation, thermal energy, and kinetic energy including mechanical vibration, human motion and air flow ( figure 1.a). In this project, kinetic energy is used as it is the most versatile and ubiquitous energy source. We will develop a MEMS device based on a novel sandwich structure with polymer electrets covered electrodes. The energy harvesting device will be driven by two-directional (2D) low frequency vibrations to generate electric energy. The generated current can be used to provide power for wireless electronic devices ( figure 1.b), and therefore strikes at the root of the battery replacement and disposal problem.

 

Official title:

Energy harvesting device with polymer electret for wireless electronic devices

 

Funded by:  

The Danish Research Council for Technology and Production Sciences

 

Fund Total:  

3,866,400 dkk

 

Responsible: 

Fei Wang

 

Partners / Scientific Colleagues: 

Ole Hansen, Associate Professor
Department of Micro- and Nanotechnology
Technical University of Denmark
Ørsteds Plads, Building 344, room 032
2800 Kgs. Lyngby, Denmark 

 

Erik Vilain Thomsen, Professor

Department of Micro- and Nanotechnology

Technical University of Denmark

Ørsteds Plads, Building 344, room 028

2800 Kgs. Lyngby, Denmark

 

Xinxin Li, Professor

Shanghai Institute of Microsystem and Information Technology

Chinese Academy of Science

865 Changning Road,

200050, Shanghai, China

 

 

 

 

https://www.nanotech.dtu.dk/english/Research-mega/Projects/Externally_Funded_Projects/Energy_harvesting_device
19 MAY 2019