| Project/Area Number |
25410248
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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 |
Device related chemistry
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| Research Institution | Iwate University |
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Principal Investigator |
UI KOICHI 岩手大学, 工学(系)研究科(研究院), 准教授 (60360161)
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| Co-Investigator(Renkei-kenkyūsha) |
KADOMA YOSHIHIRO 岩手大学, 大学院工学研究科, 助教 (90431460)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | リチウムイオン電池 / 室温イオン液体 / 負極 / 黒鉛 |
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| Outline of Final Research Achievements |
The purpose of this study is to obtain fundamental knowledge about the design of the interface between room-temperature ionic liquid electrolytes and the natural graphite negative electrode. The discharge capacities were different at the high current densities although the initial charge-discharge characteristics were the same regardless of the cation types. The EDX and XPS results indicated that the surface deposit covering the graphite particles consisted of LiF, C, O, and S regardless of the cation types. The electrochemical impedance spectra indicated that the resistance of the surface deposit varied according to the cation type.
Based on these results, it was clarified that the main component of the surface deposit was an inorganic compound derived from the anion species; the cation type had an influence on the formation and the resistance of the surface deposit, then the discharge properties at the high current densities.
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