| Project/Area Number |
16K04893
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Nanomaterials chemistry
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| Research Institution | Suwa University of Science (2018)
Tokyo University of Science, Suwa (2016-2017) |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | 単層カーボンナノチューブ / 捻り / 機械的エネルギー貯蔵 / 重量エネルギー密度 / 物理的修飾 / 化学的修飾 / カーボンナノチューブロープ / ナノカーボン / ナノチューブロープ / エネルギー貯蔵 |
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| Outline of Final Research Achievements |
The purpose of this study is to improve the amount of mechanical energy storage by twisting single wall carbon nanotube (SWCNT). The preparation method of rope samples consisting of SWCNT with 1.5 nm in diameter was established. The system was improved to measure the dynamic gravimetric energy density, and the average value of 0.22 MJ/kg and the maximum value of 0.45 MJ/kg were obtained. Various chemical and physical modifications were performed to strengthen rope samples. The average and maximum values were 0.30 and 0.76 MJ/kg for flash-light-irradiated samples, 0.32 and 0.68 MJ/kg for sulfur-reacted samples, and 0.27 and 0.82 MJ/kg for carbon-deposited samples. Considering that the gravimetric energy density was less than 0.1 MJ/kg at the beginning of this research, it is a great progress to be able to repeatedly prepare SWCNT ropes exceeding lithium-ion batteries (0.72 MJ/kg).
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| Academic Significance and Societal Importance of the Research Achievements |
カーボンナノチューブの高弾性・高強度に着目した機械的エネルギー貯蔵は格段の安全性・軽量性を備えており，貯蔵エネルギー量が既存デバイス（リチウムイオン電池やスーパーキャパシタ）の2-3倍になれば圧倒的に有利である。捻りという単純な機構から，再生可能エネルギー・移動体のエネルギー・四肢の運動エネルギーの貯蔵などあらゆる用途に応用が広がる。これまで有効利用できなかったエネルギーの活用にも適用ができる。
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