| Project/Area Number |
09555279
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
無機工業化学
|
|---|
| Research Institution | Tokuyama College of Technology |
|---|
Principal Investigator |
OHASHI Masao Tokuyama College of Technology General Education Associate Professor, 一般科目, 助教授 (80160597)
|
|---|
| Project Period (FY) |
1997 – 1998
|
| Project Status |
Completed (Fiscal Year 1998)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1998: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1997: ¥2,800,000 (Direct Cost: ¥2,800,000)
|
|---|
| Keywords | Layered Crystal / Titanate / Battery / Cathode Material |
|---|
| Research Abstract |
Layer structured crystals of Cs_XTi_<2-X/4>O_4 and K_XMn_XTi_<2-X>0_4 have been studied as cathode materials for lithium batteries, In the course of the present study, it was found that K_<0.08>Li_<0.22>Mn_<0.75>O_4 derived from K_<0.75>Mn_<0.75>Ti_<1.25>O_4 (x=0.75 in K_XMn_XTi_<2-X>0_4) is a promising cathode material.
K_<0.75>Mn_<0.75>Ti_<1.25>O_4 was oxidized by KmnO_4 solution of sulfuric acid, followed by lithium ion exchange in an aqueous solution. The resulting K_<0.08>Li_<0.22>Mn_<O.75>Ti_<l.25>0_4.1.2H_20 contains interlayer water which is removed by heating at 250ﾟC in air or at 150ﾟC in vacuo. It was shown that K_<0.08>Li_<0.22>Mn_<0.75>Ti_<1.25>O_4. exhibits 130 mAh/g rechargeable capacity in the voltage range of 1.0-4.3V.
|
