Institute for Materials Chemistry and Engineering, Kyushu University


LAST UPDATE 2017/02/25

  • 研究者氏名
    Researcher Name

    岡田重人 Shigeto OKADA
    教授 Professor
  • 所属
    Professional Affiliation

    Institute for Materials Chemistry and Engineering, Kyushu University

    先端素子材料部門 エネルギー材料
    Division of Advanced Device Materials, Energy Storage Materials
  • 研究キーワード
    Research Keywords

    Aqueous sodium-ion battery
    All solid-state symmetrical battery
    Intercalation host compounds
    Conversion reaction
Research Subject
Research and development of post lithium-ion batteries for large-scale eenergy storage system

研究の背景 Background


Nowadays, instead of semiconductors, new batteries are expected as key devices of many industries in Japan, such as telecommunications, automobiles, robotics and the power-generation industries. So, “Battery industrial nation” is considered to be one of the new national identities that will symbolize a new Japan. In order to respond to the needs of the time, material researches to realize large-scale rechargeable batteries for the next generation are being conducted by the financial supports of some national projects such as NEDO RISING and MEXT ESICB.

研究の目標 Outcome


Our research targets are to overcome the 2 big drawbacks (the cost and safety) of the commercialized Li-ion battery. Now, all solid-state Na-ion symmetrical battery and aqueous Na-ion battery are mainly investigated as the promising candidates of post Li-ion battery. Our final destination will be aqueous Mg-ion battery with higher energy density than that of Li-ion battery.

研究図Research Figure

Fig.1. Typical cathode candidates for next generation Li-ion battery. Fig.2. Discharge/charge profiles of orgnic Na2C6O6 cathode against Na/Na+. Fig.3. Electrochemical window of aqueous Na-ion batteries( left) and the cathode and anode candidates within the window (right).

文献 / Publications

S. Okada, K. Nakamoto, and K. Chihara, Electrochemistry, 83, 170-175 (2015).
J. Zhao, J. Xu, D. H. Lee, N. Dimov, Y. S. Meng, and S. Okada, J. Power Sources, 264, 235-239 (2014).
K. Chihara, N. Chujo, A. Kitajou, and S. Okada, Electrochim. Acta, 110, 240-246 (2013).