2005 Fiscal Year Final Research Report Summary
Development of Bicontinuous Mesoporous Oxide Materials
| Project/Area Number |
15360348
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Nagasaki University |
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Principal Investigator |
KUDO Tetsuichi Nagasaki University, Faculty of Engineering, Professor, 工学部, 教授 (90205097)
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| Co-Investigator(Kenkyū-buntansha) |
MORIGUCHI Isamu Nagasaki University, Graduate School of Science and Technology, Associate Professor, 大学院生産科学研究科, 助教授 (40210158)
YAMADA Hirotoshi Nagasaki University, Faculty of Engineering, Assistant Professor, 工学部, 助手 (10359961)
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| Project Period (FY) |
2003 – 2005
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| Keywords | porous material / titanium dioxide / vanadium oxide / carbon nanotube / electric double layer / Li-intercalation / charge-discharge |
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| Research Abstract |
In recent years, it is expected to develop high performance power sources from the viewpoint of possible application as auxiliary power units for fuel cell electric vehicle. The present study investigated a development of charging-discharging electrode materials with high power and energy densities. It was revealed that control of nanoporous structure is effective for yielding high rate charging-discharging electrode materials.
The research results are as follows.
1.Mesoporous and macroporuos anatase-TiO_2 were successfully synthesized by a bicontinuous microemulsion-aided process and a colloidal crystal-template process, respectively. The mesopores and macropores enabled Li-salt electrolyte to penetrate smoothly, and the high surface area promoted high rate Li-intercalation reaction. However it was also found that increase in electronic conductivity of porous samples is required for yielding high performance of charging-discharging.
2.Nanoporous carbons obtained by a colloidal crystal-template process showed high electric double-layer capacitive property, indicating that the formation of mesopores and macropores are indispensable for high rate ion transport.
3.Mesoporous and macroporous nanocomposite of TiO_2 and carbon nanotubes were successfully synthesized for the first time. Macroporous nanocomposite of porous carbon and V_2O_5 nanolayers was also fabricated. These porous nanocomposites showed extremely high capacities at high charging-discharging rates because of coexistence of ion-transport and electron-conduting nanochannels in the materials.
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