| Budget Amount *help |
¥45,890,000 (Direct Cost: ¥35,300,000、Indirect Cost: ¥10,590,000)
Fiscal Year 2016: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2015: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2014: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2013: ¥27,690,000 (Direct Cost: ¥21,300,000、Indirect Cost: ¥6,390,000)
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| Outline of Final Research Achievements |
A dealloying in metallic melt, a novel top-down process for preparing nanoporous Si powder was developed. By immersing magnesium-silicon alloy precursor in bismuth metal melt, magnesium selectively dissolved into bismuth melt and the remaining silicon atoms self-organized into an open-cell type nanoporous structure. A lithium secondary battery anode made with the developed nanoporous Si exhibited about 3 times higher capacity than that of graphite anode and extremely long lifetime exceeding 1500 cycles.
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