| Project/Area Number |
26630359
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Material processing/Microstructural control engineering
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
HARA NOBUYOSHI 東北大学, 工学(系)研究科(研究院), 教授 (40111257)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MUTO Izumi 東北大学, 大学院工学研究科, 教授 (20400278)
SUGAWARA Yu 東北大学, 大学院工学研究科, 助教 (40599057)
|
|---|
| Project Period (FY) |
2014-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
|
|---|
| Keywords | ナノポーラス鉄 / 空気電池 / 負極 / 鉄基ヘテロアモルファス合金 / ナノ結晶析出相 / アモルファス母相 / 選択溶解 |
|---|
| Outline of Final Research Achievements |
In order to develop a high performance negative electrode for next generation metal-air batteries, a new fabrication technique of nanoporous Fe with bimodal structures was examined. Amorphous Fe85Si2B8P4Cu1 (a-Fe) alloy ribbons were used as a starting material and heat-treatments were applied to form a mixed structure consisting of α-Fe nanocrystals with a diameter of 20nm and a-Fe matrix. The selective dissolution of α-Fe nanocrystals was carried out by anodic polarization in weakly acidic sulfate solutions to form a bimodal structure consisting of ligaments (residue of a-Fe matrix) and pores (trace of α-Fe dissolution). The nanoporous Fe showed the reversible oxidation and reduction behavior in alkaline solutions and thus the applicability as a positive electrode of metal-air batteries.
|
