| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Outline of Final Research Achievements |
For the purpose of obtaining high-energy-density Li-ion battery anodes, Si nanoparticles prepared via a top-down approach (mechanical milling) were hybridized with various carbon materials. The Si nanoparticles were derived from Si waste in semiconductor industry, which can be employed in practical Li-ion batteries in terms of cost. A series of graphite/Si composite electrodes with high mass loading of active materials (~3 mg/cm2) were compared in terms of the Li-ion charge/discharge cyclability. Among the samples, the scale-like shaped graphite (Z-5F)/Si electrodes showed the best cycle performance and kept >440 mAh/g (1.5 mAh/cm2) after 200 cycles at 200 mA/g. It is proposed that the increase of mass loading on an electrode is promising to obtain a high-energy density anode rather than increasing the ratio of Si.
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