| 研究課題/領域番号 |
22KF0156
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| 補助金の研究課題番号 |
22F22035 (2022)
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 (2023)
補助金 (2022) |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分26040:構造材料および機能材料関連
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| 研究機関 | 山梨大学 |
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研究代表者 |
宮武 健治 山梨大学, 大学院総合研究部, 教授 (50277761)
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| 研究分担者 |
YADAV VIKRANT 山梨大学, 大学院総合研究部, 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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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
2,300千円 (直接経費: 2,300千円)
2024年度: 500千円 (直接経費: 500千円)
2023年度: 1,100千円 (直接経費: 1,100千円)
2022年度: 700千円 (直接経費: 700千円)
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| キーワード | anion exchange membranes / fuel cells / water electrolyzers |
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| 研究開始時の研究の概要 |
Designing and synthesis of alkali stable imidazolium salts, designing and synthesis of series-connected cycloaliphatic diamine-based tetra-cationic cross-linker, tethering of long alkyl chain on poly(p-phenylene) backbone, controlled cross-linking and quaternization on partially quaternized bromoalkylated poly(p-phenylene) will be carried out to develop robust AEM for anion exchange membrane fuel cell (AEMFC) applications. Other applications such as alkaline water electrolysis cells will also be investigated.
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| 研究実績の概要 |
In this year,a series of 2,5-dichlorobenzene monomers differed in semi-fluoroalkyl pendant length were synthesized and copolymerized. The terpolymers provided bendable membranes by solution casting. The maximum ion conductivity of 112 mS/cm was achieved for the membrane formulated with C11 pendant. Cx-QPip-n membranes showed good alkaline stability, in particular, C11-QPip-1.86 retained 75% of the original conductivity after 1,056 h in harsh alkaline conditions (8 M KOH aqueous solution at 80 degrees C). C11-QPip-1.86 membrane was subjected to alkaline water electrolysis cell with Co-based platinum group metal-free anode catalyst which showed good performance. The cell was durable for 1000 h with minor voltage change at a constant current density operation.
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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
According to the research plan, highly conductive and alkaline stable anion exchange membranes were developed and analyzed.
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| 今後の研究の推進方策 |
The rational design and synthesis of AEM is planned by taking into consideration the loading of maximum number of quaternary ammonium groups on poly(p-phenylene) backbone so that resultant AEMs could avail desired properties. This will accomplish in two steps: i) Partial quaternization (60-80 mol% in relation to available bromine atoms) of bromoalkylated poly(p-phenylene) using imidazolium salt which showed long term alkaline stability using both techniques (NMR investigation and Density Functional Theory), and ii) controlled degree of cross-linking with simultaneous quaternization using series-connected tetra-cationic cross-linker which also showed long term alkaline stability. This approach mitigate trade-off between hydroxide ion conductivity and mechanical stability.
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