Materials Development Division

Hydrogen Functional Materials

Shin-ichi ORIMO Photo
Prof. Shin-ichi ORIMO (WPI)
Assoc. Prof. Shigeyuki TAKAGI
Assist. Prof. Toyoto SATO

“HYDRIDE” Researches for Energy Applications

Our division is engaged in researches on ”HYDRIDES” for energy applications. The main subjects are the development of high-density hydrogen storage materials for fuel cell applications, lithium/sodium fast-ionic conductors for battery applications and superconducting materials. The primary objective is the development of novel hydrogen storage materials for automotive applications, using multiple cutting-edge techniques for atomic/electronic characterization and first-principles calculations. In addition to the hydrogen storage materials, we are engaged in the development of fast-ionic conductors and the implementation of them into next-generation energy devices.

high-density hydrogen storage materials, superionic conductors, next generation batteries
Hydrogen diagram (top) illustrating the bonding flexibility of hydrogen with a tetrahedron

Hydrogen diagram (top) illustrating the bonding flexibility of hydrogen with a tetrahedron; the spheres located at each vertex represent a proton (H+), a hydride ion (H-), covalently bonded hydrogen (HCOV.) and neutral hydrogen (H0). Novel complex hydride Mg3CrH8 with coexistence of H- and HCOV. (bottom right) synthesized by high-temperature high-pressure apparatus utilizing cubic-type multi-anvil press (bottom left).

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Bulk-type all-solid-state lithium-sulfur battery using LiBH4 electrolyte (top, collaboration with Mitsubishi Gas Chemicals Co., Ltd.) and sodium fast-ionic conductivity of Na2B10H10 (bottom, collaboration with Graduate School of Engineering, Tohoku University, and NIST (USA)).

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