| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
Throughout the present research for developing composite energy devices of flexible thin film secondary batteries and solar cells for utilizing energy harvesting, the following results were obtained. 1) Thin film thicknesses of positive electrode LiMn2O4 and negative electrode Nb2O5 was optimized, the capacity of thin film battery improved to about 40 uAh/cm2. In the development of novel electrolytes, ion conductivity of the LiSiPO is about the same as that of the LiPON thin film, but the sputtering time was saved about 3/4. 2) The performance of solar cells based on ZnO nanorods could only be slightly improved. 3) Composite energy devices could be fabricated using stacking technology, and in the charge/discharge experiments, it was possible to self-charge the thin film secondary battery with the solar cell.
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