| Budget Amount *help |
¥24,960,000 (Direct Cost: ¥19,200,000、Indirect Cost: ¥5,760,000)
Fiscal Year 2017: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2016: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2015: ¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
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| Outline of Final Research Achievements |
Pure H- conduction was realized in the La2-x-ySrx+yLiH1-x+yO3-y system (LSLHO). The all-solid-state Ti/LSLHO/TiH2 cell exhibited a discharge reaction with hydrogen storage/desorption on the electrodes. The present success confirms not only the capability of LSLHO to act as a solid hydride electrolyte, but also the possibility of developing electrochemical solid devices based on H－ conduction.
We established the simple synthesis method at ambient pressure (AP) for LSLHO. An AP sample with low H- concentration exhibited a crystal structure and a conductivity similar to those observed for the HP sample. In contrast, Sr2LiH3O synthesized at AP has super lattice that is formed by ordering of H-/vacancies and H/O in the axial and apical anion sites, respectively. The H- conductivity of AP sample of Sr2LiH3O jumped around 648 K with disordering them, and showed high conductivity over 1 mS/cm.
We synthesized a H- super ionic conductor Ba2LiH3O possessing a conductivity over 10 mS/cm at 588 K
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