Step-up evaluation adopted research teams: 2020

Koichiro Ishibashi

Practical applications of RFEH technology by combination of SSFET rectenna and piezoelectric transformer

Research Director
Koichiro Ishibashi

The University of Electro-Communications
Graduate School of Informatics and Engineering
Professor

Collaborator
Jiro Ida Kanazawa Institute of Technology
Electrical and Electronics Engineering
Professor
Takahiko Yanagitani Waseda University
Faculty of Science and Engineering
Department of Electrical Engineering and Bioscience
Associate Professor
Hiroshi Hirayama Nagoya Institute of Technology
Department of Electrical and Mechanical Engineering
Associate Professor
Outliner

The aim of this research is to develop a high frequency selection WuR that combines RFEH technology and piezoelectric transformer technology, and to realize Sub uW operation systems activated with the Wake Up signal. These enable the application system to operate with an average power of about 1uW generated by RFEH. In addition, integration of piezoelectric elements, rectifying devices, and antennas on a Si substrate or PCB board will significantly reduce the cost, so that their practical use will be promoted.

Isaku Kanno

Development of high-efficient lead-free piezoelecctric thin-film energy harvesting system

Research Director
Isaku Kanno

Kobe University
Engineering
Professor

Collaborator
Kazusuke Maenaka Hyogo Prefecture University
Engineering
Professor
Takeshi Yoshimura Osaka Prefecture University
Engineering
Associate Professor
Tomoaki Yamada Nagoya University
Graduate School of Engineering
Professor
Outliner

The purpose of this project is to realize flexible lead-free piezoelectric thin-film energy harvesters which can be used under large acceleration or high impulsive force. By using the lead-free piezoelectric thin films and energy harvesting devices of this research, we will develop autonomous power sources with the combination of all-solid thin-film secondary batteries. This development enables the energy harvesters to be used in a variety of application areas where the stable vibration does not exist. The goals of this project are as follows.
- Wireless communication by flexible and high-G resistant piezoelectric thin-film energy harvesters.
- Micro-power generation system combined with piezoelectric thin-film energy harvesters and all-solid thin-film Li-ion batteries.

Junichiro Shiomi

Sensing system with thermoelectric energy harvestors based on phonon engineering

Research Director
Junichiro Shiomi

The University of Tokyo
Department of Mechanical Engineering, School of Engineering
Professor

Collaborator
Masahiro Goto National Institute for Materials Science
International Center for Materials Nanoarchitectonics
Eiji Iwase Waseda University
Department of Applied Mechanics and Aerospace Engineering, School of Fundamental Science and Engineering, Faculty of Science and Engineering
Professor
Shinya Kato Nagoya Institute of technology
Department of Electrical and Mechanical Engineering, School of Engineering
Assitant Professor
Outliner

For the two kinds of materials we have been developmenting; silicon (Si) nanocomposite sintered materials and Si-based nanostructure-controlled thin films, through demonstration and practice of the thermoelectric strain engineering technique, we enhance the figure-of-merit at around room temperature, scale up to bulk size, and lower the cost of materials/processes. Then we integrate the materials to two kinds of cost-effective flexible thermoelectric devices; stretchable device driven by out-of-plane temperature difference and origami-type device dreiven by in-plane temperature difference, respectively. With this, we aim to expand the use of thermoelectric conversion technology by reducing costs and adding value.

Chul-Ho Lee

Development of thermoelectric module using materials of low thermal conductivity

Research Director
Chul-Ho Lee

National Institute of Advanced Industrial Science and Technology
Research Institute for Energy Conservation
Prime Senior Researcher

Collaborator
Yoshikazu Mizuguchi Tokyo Metropolitan University
Graduate School of Science
Associate Professor
Koichiro Suekuni Kyushu University
Interdisciplinary Graduate School of Engineering Sciences
Associate Professor
Kazuhiko Kuroki Osaka University
Department of Physics
Professor
Ken Kurosaki Kyoto University
Institute for Integrated Radiation and Nuclear Science
Professor
Outliner

We will develop high performance thermoelectric modules, which convert heat presented in the natural environment into electricity with high efficiency. For the purpose, we will further improve thermoelectric properties of materials developed in the first stage and develop the modularization technology. To date, modules based on Bi-Te-Sb system are already in practical use around room temperature. Although a demand for energy harvesting is recently rapidly growing, Bi-Te-Sb modules are not widely used due to high cost. Thus, we will develop high performance and low cost thermoelectric modules using substitute materials for Bi-Te-Sb.

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