| Project/Area Number |
15560650
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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 |
Properties in chemical engineering process/Transfer operation/Unit operation
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
TANIGUCHI Izumi Tokyo Institute of Technology, Graduate School of Science and Engineering, Associate Professor, 大学院・理工学研究科, 助教授 (00217126)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2004: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2003: ¥3,300,000 (Direct Cost: ¥3,300,000)
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| Keywords | Spray Pyrolysis and Fluidized Bed Hybrid System / Lithium Manganese Oxides / Namostructured particles / Lithium Ion Batteries / Cathode Materials / 噴霧熱分解 / 粉粒流動層 |
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| Research Abstract |
A novel technique has been developed to directly produce fine ceramics powders from liquid solution by a fluidized bed and spray pyrolysis hybrid system. Using this technique, the preparation of lithium manganese oxides LiMn_2O_4, which are the most promising cathode materials for lithium ion battery, has been carried out for various superficial gas velocities U_0=0.30-0.91 m/s, concentrations of precursor solution C_0=0.45-4.50 mol/dm^3 and static bed heights L_s=50-150 mm. The as-prepared samples exhibited a pure cubic spinel structure without any impurities in the XRD patterns, and the chemical composition of as-prepared powders showed in a good agreement with the one of precursor solution.
The as-prepared LiMn_2O_4 particles were used as cathode active materials for lithium-ion battery and electrochemical studies were carried out on the charge/discharge characteristics of the Li/LiMn_2C_4 cells. As a result, the LiMn_2O_4 particles, synthesized by the spray pyrolysis in a fluidized bed reactor, exhibited better discharge capacity and cycling behavior than those by the conventional spray pyrolysis and solid state reaction.
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