Ippei Kishida

Associate Professor, Ph.D. in Engineering
I liked video games in my high school days. Games also provide various learning opportunities. Bugs are the key to understanding how computers work. In my case, building that understanding has made me a skilled programmer for my current research. I encourage you to discover opportunities to learn from what you like.
Areas of Research
Computational Materials Science, Battery Engineering, Ionics
  • Profile
  • Research
  • Dr. Ippei Kishida obtained his Ph.D. from Kyoto University in 2005. Following this, he spent 14 years as a research associate at Osaka City University before joining KUAS.

    Coming from a background in Materials & Ceramics, Dr. Kishida has spent most of his career focusing on batteries. Lithium-ion batteries are crucial to devices such as smartphones, and improving their performance leads to longer usage time, shorter charging time and the ability to run more powerful computers. His current research interest concerns how to deal with variations in ion arrangement in crystals that cause combinatorial explosions.

    At KUAS, he is primarily in charge of classes on batteries and programming.

    In his free time, Dr. Kishida enjoys cooking, drinking, programming, photography and cycling.

  • Pathfinding for Future Batteries

    Nobody can predict what will happen in the distant future, but we can think about the near future. We can imagine how we can make the world shine more beautifully. We can dream of what to build in order to change the world for the better. Energy is one of the key elements to achieving such a future.

    Today, almost everything we interact with consumes power, from the cars in the street to the smartphones in our pockets. Many of these devices are mobile, meaning that they require some form of battery to provide them with energy. In Dr. Kishida’s laboratory at Kyoto University of Advanced Science, he and his students are working to create batteries that charge faster, last longer, and cost less.

    Creating new materials is essential for developing new batteries. Dr. Kishida’s research focuses on the discovery and creation of material development methods via computer simulation. By reproducing physical phenomena and chemical reactions in a computer, it is possible to estimate the performance of many substances, including those which humanity has yet to even acquire. However, raw computing power is not enough; intelligent calculation methods must be applied to achieve results.

    When developing battery materials, one of the challenges is learning how ions flow through a substance. Dr. Kishida has developed a new method for mapping these atomic pathways by combining his materials calculations with graph theory, a field of mathematics. This method was then applied to a super-ionic α-AgI conductor which demonstrated much higher ionic conduction than even that of liquid. Thus, the ionic conduction mechanisms of α-AgI were clearly revealed.

    Dr. Kishida is also applying his ionic conduction theories to electrode and electrolyte materials for lithium-ion batteries. These results will contribute to near-future improvements in these technologies. However, his true ambition is to develop a next-generation battery to replace lithium-ion cells, thereby ushering in a new era in mobile energy. This will likely involve batteries that use multivalent ions, such as magnesium ion (Mg2+) and aluminium ion (Al3+). These batteries will likely have storage capacities twice or three times the size of contemporary lithium ion (Li+) cells.

    At present, it is difficult to find a suitable material for multivalent-ion batteries. However, a substance which meets these requirements is believed to exist. Thus, Dr. Kishida continues his search for ways to make the future a brighter one.