| 研究課題/領域番号 |
22KF0115
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| 配分区分 | 基金 |
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| 研究機関 | 東京大学 |
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研究代表者 |
山田 淳夫 東京大学, 大学院工学系研究科(工学部), 教授 (30359690)
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| 研究分担者 |
HARKS PETRUS 東京大学, 大学院工学系研究科(工学部), 外国人特別研究員
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| 研究期間 (年度) |
2023-03-08 – 2025-03-31
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| キーワード | Li-ion batteries / Li-metal batteries / Anode-free batteries / LiPF6, / weak solvation |
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| 研究実績の概要 |
Current achievements are the elucidation of fundamental aspects of weakly solvating LiPF6 electrolytes and the subsequent development of new, high performing electrolytes. This includes 1.) understanding the implication of the chemical instability of LiPF6 and consequent requirements for the battery cell configuration for this new class of electrolytes. 2.) The principles behind resistance to LiPF6-induced polymerization of ether solvents, obtained through density functional calculation. 3.) The influence of the ether solvents on the solvation structure of Li+, computed by molecular dynamics calculations. These insights open up a new avenue for the development of commercially viable electrolytes for next generation batteries based on Li-metal anodes.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
As planned, at this stage most of the experimental work is complete. That is, new electrolytes with enhanced performance have been successfully developed, and were fully characterized (cycling performance in battery cells, ionic conductivity, viscosity etc). Current work focusses on getting a better understanding of the solid electrolyte interphase formation on the Li electrode, as this mechanism is still largely unknown for LiPF6 electrolytes. This includes chemical analysis of the interphase on the Li-anode and calculations on the solvation structures of the electrolytes.
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| 今後の研究の推進方策 |
Current plans involve the finalization of experiments and manuscript preparation to deliver the goals of the project in a timely matter. The last experiments focus on the characterization of the interphase of the Li-anode after cycling in the new electrolytes. The chemical composition will be measured by x-ray absorption spectroscopy and the surface morphology will be studied with scanning electron microcopy. Furthermore, additional Raman spectroscopy measurements on the electrolytes will be performed to further validate and optimize the molecular dynamics and density functional theory calculations.
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