Step-up evaluation adopted research teams: 2019

Yuji Suzuki

Development of High-output-power Electret Energy Harvesting for Wearable Devices

Research Director
Yuji Suzuki

The University of Tokyo
Graduate School of Engineering
Professor

Collaborator
Takashi Kato The University of Tokyo
Graduate School of Engineering
Professor
Yumi Tanaka Tokyo University of Science
Faculty of Engineering
Associate Professor
Masafumi Yoshida Tokyo City University
Faculty of Science and Engineering
Professor
Outliner

Electret is a dielectric, of which electric charge is permanently hold. Electrostatic induction power generation using electret has excellent characteristics especially in small scale, low frequency environmental vibration power generation. In this research, based on innovative electret materials and liquid crystals for power generation, which we have been studying so far, new manufacturing technology for mounting these materials on the high-output-power energy harvester will be developed for wearable devices. In addition, standard evaluation method will be developed for power generation prediction in order to facilitate social implementation of such energy harvester.

Hiroshi TOSHIYOSHI

Perpetual Electronics by MEMS Vibrational Energy Harvester

Research Director
Hiroshi TOSHIYOSHI

The Universit of Tokyo
Institute of Industrial Science
Professor

Collaborator
Gen HASHIGUCHI Shizuoka University Academic Institute
College of Engineering
Professor
Takaaki SUZUKI Gunma University
Graduate School of Science and Technology
Professor
Outliner

We develop a new technology to realize an autonomous microelectronics chip that drives itself by the electrical power ranging from 10 µW to 100 µW retrieved within a chip from the environmental vibrations of around 100 Hz and 0.1 G through the hybrid/monolithic integration of MEMS (microelectromechanical systems) vibrational energy harvesters with microelectronic circuits.

Masahiro Nomura

Sensing system with thermoelectric energy harvestors based on phonon engineering

Research Director
Masahiro Nomura

The University of Tokyo
Institute of Industrial Science
Professor

Collaborator
Masato Ohnishi The University of Tokyo
Graduate School of Engineering
Project Lecturer
Tadayuki Morishita Maeda Corporation
ICI General Center
Group Manager
Junichi Harashima TOPPAN PRINTING CO.,LTD.
Electronics Division
Supervisor
Yoshifumi Yoshida SEIKO FUTURE CREATION INC.
Research and Development Department
General Manager
Outliner

We investigate phonon engineering, which enables advanced thermal management in solid, and contribute to the development of thermal conduction control technology by nanostructures using ballisticity and wave nature of thermal phonons. We also develop thermoelectric material with low environmental load based on phonon engineering and contribute to build up smart community by realization of sensing systems powered by thermoelectric energy harvesters in an academia-industry framework.

Takao Mori

Development of thermoelectric power generation devices and applications based on novel magnetic semiconductor thermoelectric materials

Research Director
Takao Mori

National Institute for Materials Science (NIMS)
Research Center for Functional Materials
Group leader

Collaborator
Nobuhiko Kobayashi University of Tsukuba
Faculty of Pure and Applied Sciences
Professor
Ernst Bauer Technische Universit├Ąt Wien
Institute of Solid State Physics
Professor
Outliner

This project aims to combine two striking mechanisms we discovered to enhance thermoelectric properties. Namely, utilizing magnetism (i.e. magnetic interaction and spin fluctuation) for enhancement effective at relatively high temperatures, and also enhancement via novel nanostructuring, thereby, developing high performance magnetic semiconductor thermoelectric materials and devices, which can serve as replacement to Bi2Te3-type materials and modules for cooling, and realise application of power generation.

Takanobu Watanabe

Demonstration and Development of Scalable Planar Thermoelectric Power Generator

Research Director
Takanobu Watanabe

Waseda University
Faculty of Science and Engineering
Professor

Collaborator
Yoshinari Kamakura Osaka Institute of Technology
Faculty of Information Science and Technology
Professor
Tsuyohiko Fujigaya Kyushu University
Faculty of Engineering
Professor
Masashi Kurosawa Nagoya University
Graduate School of Engineering
Associate Professor
Outliner

A new scaling strategy has emerged for the thermoeletric energy harvester. The power density of the planar-type thermoelectric generator is found to be improved by miniaturization and integration, similar to Si-LSI techology. This project focused on the demonstration of the Si-based thermoelectric generator, and its development using a carbon nanotube sheet, aimed at applications in wareable devices and forthcoming IoT technlogies.

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