2015 Fiscal Year Final Research Report
Mechanism of elecrtrochemical activity of Li2MnO3 induced by coexisitng with copper oxide
| Project/Area Number |
25410255
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Device related chemistry
|
|---|
| Research Institution | Kansai University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Keywords | Li-ion battetry / electrochemical activity / copper oxides / abinitio calculation |
|---|
| Outline of Final Research Achievements |
We have found that the electrochemical activity of Li2MnO3 as a positive electrode for Li-ion secondary batteries is much improved by CuO coexisting, and clarified the mechanism of the improvement. The general way to induce the activity is to substitute Mn for Co or Ni. However, this research introduced a new way to exhibit high electrochemical activity by CuO which has rich in mineral resources. Our investigations showed that CuO made the particles of Li2MnO3 fine and disordering of Li in the crystal structure of Li2MnO3 occurred according to CuO content. By use of in-situ GC-MS measurement we succeeded in detecting of oxygen generation from Li2MnO3 caused by electrochemical oxidation. Both experimental and calculating investigations suggest that oxygen along with transition metals could participate in electrochemical oxidation and reduction, and a new potential of Li2MnO3 and copper oxides as positive electrode for Li-ion secondary batteries.
|
| Free Research Field |
固体電気化学
|
