| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2020: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Outline of Final Research Achievements |
Focusing on the water vapor reaction on oxide surfaces, we aimed to realize solid-solid interface bonding between electrode active material and oxide-based solid electrolyte for lithium-ion batteries by water vapor heating. As a result, we succeeded in synthesizing a maze-like porous oxide with high-capacity anode performance by accelerating particle bonding and inserting conductive carbon nanoparticles into it to improve the cycle performance. We also found that structural changes occur on the surface of the cathode active material during heating in water vapor. Furthermore, the ultrafine particles of the oxide-based solid electrolyte were prepared, and its recrystallization was accelerated by water vapor heating. Composite electrodes were prepared by compositing the electrode active material with oxide-based solid electrolyte nanoparticles and were confirmed to work in an all-solid-state half-cell.
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