| Project/Area Number |
09650907
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
工業物理化学
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| Research Institution | Yamaguchi University |
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Principal Investigator |
MORITA Masayuki Yamaguchi University, Faculty of Engineering, Professor, 工学部, 教授 (70136167)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIMOTO Nobuko Yamaguchi University, Faculty of Engineering, Research Associate, 工学部, 助手 (30253173)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1998: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1997: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | Magnesium / Rare earth / Non-aqueous solution / Cathode deposition / Polymer electrolyte / Ion conductivity / Rechargeable battery / Electrochemical capacitor |
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| Research Abstract |
The material designing and the process analysis have been done to construct a new electrochemical energy conversion system utilizing the electrochemistry of such multivalent cations as magnesium and rare earth cations in non-aqueous media. The results are summarized as follows.
1. Ionic Structure and Conduction Behavior of Mono-. Di- and Trivalent Cations in Non-aqueous Media-
Ionic structures of Mg^<2+> and Ln^<3+> (Ln : rare earth metals) in organic media and polymer (gelled) matrices have been analyzed by spectroscopic and electrochemical methods. One of the new findings was that co-existence of cations with different valences leads to unique conductance behavior of polymer-based electrolytes.
2. Analyses of Electrochemical Redox Reactions of Multivalent Cations in Non-aqueous Media -
Effects of the counter ion and media on the electrochemistry of Mg^<2+> were clarified for organic solution and polymer gel electrolytes. Conditions for efficient electrodeposition of Mg metal or Mg-based alloys were established.
3. Effects of the Ionic Structure on the Redox Process of Transition-metal' Complex Oxides in Non-aqueous Media -
Effects of the electrolyte composition (solvent and salt) on the redox process of transition-metal complex oxides were investigated to apply the process to high energy density rechargeable batteries. The electrolyte composition significantly affected the charge transfer process at the solid/solution interface.
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