| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
A series of lithium iron titanium oxides of Li1/2+1/2xFe5/2-3/2xTixO4 with 0 <= x <= 1.666 was prepared by a conventional solid-state reaction technique, and was examined as a negative electrode material for advanced lithium-ion batteries. Powder X-ray diffraction measurements and Raman spectroscopy clarified that the crystal structure of Li1/2+1/2xFe5/2-3/2xTixO4 is divided as two regions; the region at x <= 1 with cation order between Li and Fe ions and the region at x > 1 with cation order between Li and Ti ions. Structural and electrochemical studies were also performed for Li[Ni1/2Mn3/2]O4 and LiCo1-xNixO2, which are suitable as a positive electrode material for lithium-ion batteries using the Li1/2+1/2xFe5/2-3/2xTixO4 materials.
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