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Amezawa-Kawai Lab
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A lab that explores the foundations of fuel cells and secondary batteries through solid state ionics.
AboutAbout the lab
Exploring energy conversion in solids where ions move.
The Amezawa Lab studies "solid state ionics," in which ions move rapidly within solids.
To make fuel cells and lithium-ion batteries that rely on this property widely usable, the lab conducts fundamental research on materials.
It investigates the mechanisms of ion transport, reactions at material interfaces, and the structure of crystal defects.
The lab also develops analytical techniques for measuring devices while they operate in special environments, such as high temperatures and controlled atmospheres.
Key terms
- solid state ionics
- The field that studies phenomena in which ions move within solids. This lab makes it the core of its research on fuel cells and secondary batteries
- solid oxide fuel cell
- A fuel cell that uses a solid oxide as the electrolyte and operates at high temperatures of 600–800°C
- operando measurement
- A method of measuring the state of the electrodes and electrolyte inside a battery while it is actually running
NewsLab news
A master's student received the Best Poster Presentation Award at the Solid State Ionics Seminar
A paper by a project researcher and a former international student was published online
A paper by a doctoral student was published online
ResearchResearch themes
Centered on solid state ionics, in which ions move within solids, the lab conducts fundamental research on environmentally friendly energy conversion devices such as fuel cells and secondary batteries. It aims to deeply understand the reactions occurring inside devices and to design materials and electrodes based on that understanding.
*Illustrative imageUnraveling electrode reactions in fuel cells
In solid oxide fuel cells, the overpotential caused by the oxygen reduction reaction at the air electrode is a major factor lowering performance. The lab clarifies the mechanism of this electrode reaction and works to create high-performance electrodes.
*Illustrative imageWhy fuel cells degrade
For solid oxide fuel cells, ensuring reliability and durability is a challenge for widespread adoption, alongside cost reduction. The lab investigates causes of degradation, such as Cr poisoning of the air electrode and carbon deposition on the fuel electrode, and develops methods to suppress it.
*Illustrative imageFuel cells that run at lower temperatures
Because solid oxide fuel cells operate at 600–800°C, the usable materials are limited and startup and shutdown take time. The lab conducts fundamental research aimed at optimizing the design and operating conditions of fuel cells that use proton-conducting ceramics as the electrolyte.
*Illustrative imageAnalysis while the device is running
Electrochemical measurements alone cannot directly reveal the state of electrodes and electrolytes during operation. The lab develops sample holders usable in special environments and creates operando measurement techniques that use the high-brilliance X-rays of the SPring-8 large synchrotron radiation facility.
MembersFaculty
Members of the Amezawa Lab consist of faculty, researchers, technical assistants, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorKoji Amezawa
- Assistant ProfessorKosuke Kawai
VoicesStudent voices
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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: “Pila ossido solido SOFC” Asia Vedovi / CC BY 4.0 (cropped)
- Unraveling electrode reactions in fuel cells: “Fuel Cell, Apollo - DPLA - 6554f8e39c2d88cf49bdde7ce73434ec (page 1)” United Aircraft Corporation, Pratt & Whitney Aircraft Division / CC0 (cropped)
- Why fuel cells degrade: “Toyota Mirai fuel cell stack SAO” Mariordo (Mario Roberto Durán Ortiz) / CC BY-SA 4.0 (cropped)
- Fuel cells that run at lower temperatures: “Dense pellet forming1” Dominik Bejma, Marta Kowalkińska / CC BY-SA 4.0 (cropped)
- Analysis while the device is running: “SPring-8 synchrotron SP8 BL01B1” Drac2000 at English Wikipedia / CC BY-SA 3.0 (cropped)
- Related lab (木村 研究室): “Lithium-Ionen-Accumulator” Claus Ableiter / CC BY-SA 4.0 (cropped)
- Related lab (西澤・鳥取・
大﨑 研究室): “Superabsorber Hydrogel KSG 2917 pK” Petra Klawikowski / CC BY-SA 3.0 (cropped) - Related lab (太田 研究室): “Cobalt Chromium Coronary Stent in Heart” ETTon / CC BY-SA 4.0 (cropped)
- Related lab (安西 研究室): “Incompressible Flow in a Venturi Injector” SimScale GmbH / CC BY-SA 4.0 (cropped)
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