2007 Fiscal Year Final Research Report Summary
Creation of Solid-State Protonics in Coordination Compounds
| Project/Area Number |
18350031
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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 chemistry
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| Research Institution | Kyushu University |
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Principal Investigator |
KITAGAWA Hiroshi Kyushu University, Faculty of Science, Professor (90234244)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAUCHI Miho Kyushu University, Faculty of Science, Assistant Professor (10372749)
YAMADA Teppei Kyushu University, Faculty of Science, Assistant Professor (10404071)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Protonics / Coordination Compound / Proton Conduction / Hydrogen Storage / Nanomaterials / MOF |
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| Research Abstract |
Solid state protonics is a new reseach field attracting much current attention. One of the most urgent subjects in this field is to create a novel proton conductor, from the viewpoint of developing new energy and energy conservation technologies, including photovoltaic, hydrogen storage and fuel cell technologies. In this work, we report on a proton-conductive organic-inorganic hybrid system, which is a coordination polymer. Such a metal-dimer system with multi-redox property has a large potentiality for the creation of new-functional and high-performance materials in metal-complex solids^1.
We have developed several kinds of proton conductors, which are 1-D, 2-D as shown in Figure, and 3-D coordination polymers. From the complex-plane impedance measurements, all the coordination polymers were found to be highly proton-conductive at room temperature. Among them, H_2dtoaCu exhibits highest proton conduction (〜 10^<-2> S cm^<-1>). This value is comparable to that of Nafion, which is famous for a solid electrolyte of fuel cell. The mechanism of proton conduction is discussed in detail. New highly proton-conductive coordination materials and highly-concentrated hydrogen-storage nano-materials are also discussed.
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