| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
We have developed a new plasma process for the fabrication of the Ge nanoparticle films, and applied the films to Li ion batteries. In the experiments, we have deposited crystalline Ge nanoparticle films using a radio frequency magnetron sputtering method in argon and hydrogen gas mixture under a high pressure condition. In the process, Ge nanoparticles were generated in the reactive plasma, and were transported to the downstream substrate by neutral gas flow. The Ge nanoparticles transited from amorphous to crystalline structure by adding H2 gas in the Ar discharge gas. We evaluated performance of Li ion batteries with crystalline Ge nanoparticle film as anode material. The first cycle of charge/discharge property showed that the capacity was around 1600 mAh/g. The discharge capacity remained at about 600 mAh/g after 50th cycle.
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