| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
|
|---|
| Outline of Final Research Achievements |
High-speed charge-discharge cycle of secondary batteries of lead-acid battery, nickel-hydrogen battery and lithium-ion battery were examined under high pressure, and the influence of high pressure on various battery performances was systematically studied. As for lead-acid batteries, it was clarified that high pressure is very effective in performance of most secondary batteries owing to densification, microfabrication and good recrystallization of the active material of the electrode. In the case of nickel-hydrogen battery, it is revealed that the performance of high-speed charge-discharge cycle can be improved up to about 3 times even at about 3 MPa due to the great change in the crystal form of the active material due to solvent mediated transformation by high pressure nitrogen gas. As for lithium-ion batteries, it is also clarified that if the lithium-ion battery is stored under pressure nitrogen gas at 10 MPa, the life of the lithium ion battery will be improved.
|
