| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
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| Outline of Final Research Achievements |
Synthesis of Li2MSiO4 and Li2MP2O7 (M=Fe and Mn) was carried out from a combination of low temperature spray pyrolysis and ball-milling at various synthesis conditions, such as spray pyrolysis temperatures, synthesis atmospheres, annealing temperatures, ball-milling times rotational speeds and milling times. The effect of process conditions on their physical and electrochemical properties was discussed. Field-emission scanning electron microscopy and transmission electron microscopy with energy-dispersive spectroscopy verified that the final samples are agglomerates of Li2MSiO4 or Li2MP2O7 primary particles with less than 100 nm and that the carbon was well-distributed on the surface of the agglomerates. Li2MSiO4/C or Li2MP2O7 nanocomposite samples were used as an electrode material for rechargeable lithium batteries, and electrochemical measurements were carried out at room temperature. These cells showed good electrochemical properties.
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