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New Energy Systems Lab (Okajima-Akimoto Lab)
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A lab that evaluates new energy over its life cycle and diagnoses batteries and fuel cells.
AboutAbout the lab
Energy engineering for a sustainable future
The New Energy Systems Lab researches the evaluation and risk analysis of new energy systems such as solar cells and fuel cells.
It aims for sustainable development from the "3E" perspective, which takes into account not only energy but also the economy and the environment.
Research groups work on life cycle assessment, resilience against power outages, and diagnosis of batteries and fuel cells.
The lab is led by Professor Keiichi Okajima and Assistant Professor Yutaro Akimoto. In the weekly joint lab seminar, members read through reports on the global energy outlook in turn and present their research.
Key terms
- Non-destructive diagnosis
- Examining the internal condition of a device from the outside, without breaking or disassembling it
- Resilience
- The ability to withstand a stoppage caused by a disaster or the like and to recover quickly
- Life cycle
- The whole life of a product or system, from raw material extraction through manufacturing and use to disposal
NewsLab news
A master's student's paper was accepted by Int. J. Hydrogen Energy
A student received the YPC Encouragement Award at the Power and Energy Society Conference of the Institute of Electrical Engineers of Japan
A student received an Excellent Presentation Award at ICREC
ResearchResearch themes
From the 3E perspective, which takes into account not only energy but also the economy and the environment, the lab studies the evaluation and risk analysis of new energy systems such as solar cells and fuel cells, from both the software and hardware sides. It also conducts joint research with companies and universities.
*Illustrative imageEvaluating new energy over its life cycle
For new energy sources such as solar power, wind power, and hydrogen, the lab evaluates CO2 emissions and energy consumption over the whole life, from raw material extraction and manufacturing to disposal. Its targets include Japan as well as China and India.
*Illustrative imageMeasuring energy resilience
To prepare for power outages, the lab quantitatively evaluates the resilience of solar power systems combined with storage batteries, comparing it with their environmental performance and economic performance. It also conducts evaluations of zero-emission buildings in Japan.
*Illustrative imageNon-destructive diagnosis and control of fuel cells
Using non-destructive diagnosis with magnetic sensors, the lab visualizes the current distribution inside fuel cells, aiming for stable operation. It also simulates fuel cell stacks using the three-dimensional finite element method.
*Illustrative imageIdentifying individual lithium-ion batteries
By measuring the magnetic field around a battery, the lab is investigating a method to tell individual lithium-ion batteries apart.
MembersFaculty
The members of the New Energy Systems Lab are faculty, researchers, and students in the doctoral, master's, and undergraduate programs.As of 2026
- ProfessorKeiichi Okajima
- Assistant ProfessorYutaro Akimoto
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Fuel cell bus in Shibuya” Syced / CC0 (cropped)
- Evaluating new energy over its life cycle: “AMP Energy Bhadla Solar Power Plant” Sarvajanik Puralekh / CC BY-SA 2.0 (cropped)
- Measuring energy resilience: “PV external shading device in zero energy building of Singapore” Esmail7 / CC BY-SA 3.0 (cropped)
- Non-destructive diagnosis and control of fuel cells: “Toyota Mirai fuel cell stack SAO” Mariordo (Mario Roberto Durán Ortiz) / CC BY-SA 4.0 (cropped)
- Identifying individual lithium-ion batteries: “18650 and 21700 lithium ion battery cell” Sevenethics / CC0 (cropped)
- Related lab (新宅研究室): “MetalFatigue 001” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (地域水文気候研究室): “Cycle de l'eau” toony / CC BY 3.0 (cropped)
- Related lab (エネルギーシステム研究室): “Overhead power lines in Iran 10” Mostafameraji / CC0 (cropped)
- Related lab (松田哲也研究室): “SANDWICH COMPOSITE STRUCTURE” Nur Ainin Faissal / CC0 (cropped)
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