| Project/Area Number |
18550127
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Functional materials chemistry
|
|---|
| Research Institution | Nihon University |
|---|
Principal Investigator |
YAMADA Koji Nihon University, College of Industrial Technology, Professor (10166704)
|
|---|
| Project Period (FY) |
2006 – 2007
|
| Project Status |
Completed (Fiscal Year 2007)
|
| Budget Amount *help |
¥3,060,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥360,000)
Fiscal Year 2007: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2006: ¥1,500,000 (Direct Cost: ¥1,500,000)
|
|---|
| Keywords | Lithium bromide / Indium / Rock salt structure / Spinel structure / Ionic conductivity / Rietveld analysis / 7Li NMR / 115In NMR / スピネル構造 / イオン伝導 / リートベルド解析 / イオン結晶 / リチウムイオン伝導体 |
|---|
| Research Abstract |
Ionic conductivity is one of the functional properties of material. The preparation of the new materials having high ionic conductivity is a key technology for the development of fuel cell or secondary battery. In this research, solid electrolytes having the formula LiInBr_4 and Li_3InBr_6 were prepared and their structures and conduction mechanisms were investigated on the basis of high resolution X-ray diffraction and solid state NMR.
Both of these structures could be regarded as a rock salt type in which three Li^+ is replaced by one In^<3+> and two vacancies. Although cubic LiInBr_4 belongs to a defect spinel structure, its structure can be regarded as a defect rock salt type because tetrahedral site is empty. Since the positional disorder of In^<3+> was commonly observed at the superionic state, this disorder plays an important role for the Li^+ conduction. Furthermore, a continuous solid solution Li_<1-x>,In_<x/3>Br, between LiBr and InBr_3 was suggested at least below x<0.2.
|
