Japanese delegation at PoreLab Trondheim

From left to right: Professor Bjørn Hafskjold (NTNU), Professor Koji Amezawa (Tokohu U.), Professor Emeritus Dick Bedeaux (NTNU), Professor Signe Kjelstrup (NTNU), Professor Yasuhiro Fukunaka (Waseda U.) and Ass. Professor Hironori Nakajima (Kyushu U.) 

On October the 8th, PoreLab Trondheim received the visit of a Japanese delegation with:

  • Koji Amezawa, Professor Dr., Laboratory of Solid State Ionic Devices (Amezawa Laboratory), Institute of Multidisciplinary Research for Advanced Materials, Tokohu University, Japan
  • Yasuhiro Fukunaka, Professor, Waseda University, Tokyo, Japan Aerospace Exploration Agency (JAXA), Japan
  • Yuta Kimura, Ass. Prof. Tohoku University, Sendai, Japan
  • Hironori Nakajima, Assistant Professor, Hydrogen Utilization Engineering, department of Mechanical Engineering, Faculty of Engineering, Kyushu University, Japan

Koji Amezawa presented a talk on​: “Operando 3-dimensional observation of reaction distribution in composite positive electrode for bulk-type all-solid-state lithium ion secondary batteries by using CT-XAFS“.


All-solid-state lithium-ion batteries (ASSLIBs) have attracted much attention because of their potential of high power density and safety operation. In ASSLIB electrodes, particles of active material and electrolyte are randomly distributed while constructing 3-dimensional complicated pathways of ion and electron. Therefore the charge/discharge reaction may proceed inhomogeneously in the electrode especially under high-rate operation, resulting in the degradation of the capacity and the power output. In order to ensure the rate capability of ASSLIBs, it is important to understand how the charge/discharge reaction proceeds.

In this study, we applied the 3-dimensional imaging X-ray absorption fine structure (3D-XAFS) technique to visualize the spatial distribution of the state of charge (SOC) in an ASSLIB electrode under the operation


The agenda of the day was as follow:

Present for the discussions

Prof. Koji Amezawa, Tohoku University, Sendai, Japan

Prof. Yasuhiro Fukunaka, Waseda University, Tokyo, Japan

Ass. Prof. Yuta Kimura, Tohoku University, Sendai, Japan

Ass. Prof. Hironori Nakajima, Kyushu University, Japan

Prof. Natalya Kizilova, Technical University of Warsaw, Poland, and HighEff program, NFR, NTNU

PhD student Astrid Fagertun Gunnarshaug, PoreLab

PhD student Kim Roger Kristiansen, PoreLab

Prof. Signe Kjelstrup, principal investigator, PoreLab

Prof. em. Dick Bedeaux, principal investigator, PoreLab

Prof. Bjørn Hafskjold, PoreLab


Program (tentative)

Arrival short time before lunch

12:00    Lunch with PoreLab group members

13:00    Lecture by prof. Amezawa (plenary session in PoreLab group)

14:00    Discussions on Japanese projects (guests and selected participants)

15:00    Presentations of projects, Gunnarshaug, Kristiansen

16:30    Meeting with  KIFEE student delegation leader Wojciech Marcin Swiergon

and Prof. Amezawa (tentative)


18: 00 Dinner at restaurant Havfruen, for all guests, and Gunnarshaug, Hafskjold and Kjelstrup