2022 Fiscal Year Final Research Report
Development of acidic aqueous lithium-air battery
| Project/Area Number |
20K05685
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 36020:Energy-related chemistry
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| Research Institution | Mie University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
田港 聡 三重大学, 工学研究科, 助教 (60771201)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | リチウム電池 / 金属空気電池 / 固体電解質 / エネルギー密度 / 酸素還元反応 / 酸素発生反応 / ペロブスカイト酸化物 |
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| Outline of Final Research Achievements |
Lithium-air batteries with aqueous solution have a high theoretical gravimetric energy density. The cathode of this battery consists of a combination of oxygen molecules and a neutral or basic aqueous solution electrolyte. To prevent reactions between atmospheric carbon dioxide and aqueous solutions, acidic acetic acid solutions were applied in this study. Solid electrolyte thin films that can withstand this acidic electrolyte solution were prepared by the tape casting method. The open circuit voltage of this battery system was approximately 4 V. By operating the battery under pressure, it showed stable charge-discharge cycle characteristics because the acetic acid volatilization was suppressed.
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| Free Research Field |
電気化学
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| Academic Significance and Societal Importance of the Research Achievements |
従来の電池は正負極が共通の一つの電解液を用いるものであるが、本研究では負極には負極専用の、正極には正極専用の電解液を用いる。異なる２つの電極系を組み合わせることは電池における材料選択の幅を広げるものであり、新しい電池を生み出す土壌になる。また、リチウム空気電池はリチウムイオン電池を大きく超えるエネルギー密度を発生する。多くの課題を有するが、この電池の実用化は電気エネルギーの利活用を大きく進展させ、新しい社会の創出につながるものである。
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