| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2023: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2021: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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| Outline of Final Research Achievements |
To achieve higher energy density of lithium-ion batteries using high-capacity negative electrodes or high-potential positive electrodes that operate outside the potential window of the electrode, it is necessary to suppress the reduction and oxidation of the electrolyte. In this work, we aimed to suppress the reduction and oxidation of the electrolyte by shifting the electrode potential through electrolyte design. As a result, we found the downshift of the electrode potential using a strongly coordinating anion in lithium salt and the upshift of electrode potential using ionic liquid electrolytes. We also demonstrated that the charge-discharge efficiency of a high-capacity negative electrodes increased with the upshift of the electrode potential in ionic liquid electrolytes.
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