| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
We prepared cathode particles with better properties using particle joining and particle growth in water vapor for improving the performances of lithium-ion batteries. The solid-state syntheses of spinel-type cathode materials in air and water vapor showed the promoted particle growth in water vapor and the development of crystal facets, and consequently, cathode particles with a good rate property were obtained in water vapor. Furthermore, macroporous (pore size, >50 nm) microspheres with a unique pore structure were prepared from carbonate spheres via thermal decomposition in water vapor. These results suggest that water vapor can be effectively utilized for the microstructure control of particles in a simple heating process, and then contribute to improve material properties.
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