| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2014: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2013: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2012: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
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| Outline of Final Research Achievements |
As an anode of Li-ion battery, Si has a problem of a poor cyclability due to its large volume changes during charge－discharge and a resulting stress. We prepared composite thick-film electrodes consisting of rare-earth metal silicides and elemental Si by a gas-deposition method, and investigated their anode performances. Among various rare-earth silicides/Si electrodes, Gd－Si/Si electrode exhibited the most excellent cycling performance. We revealed that the excellent performance was caused by four properties of Gd－Si: a moderate Li-storage ability, a high electronic conductivity, a high thermodynamic stability, and a more elastic property than other silicides. This elastic property probably relaxes the stress during charge－discharge.
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