2020 Fiscal Year Final Research Report
Development of photo-chargeable secondary battery using organosulfur materials as cathode electrode materials
| Project/Area Number |
18K05306
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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 | Kwansei Gakuin University |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | 二次電池 / リチウムイオン電池 / 有機硫黄ポリマー / 正極活物質 / 光酸化 / 充電 / 光充電 |
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| Outline of Final Research Achievements |
The usability and maintainability of IoT devices will be dramatically improved, if electronic devices can be charged without electricity. In this research, aiming at the realization of photo-rechargeable secondary battery without an external power source, we have developed a cathode material that has a charging function by light, and the ultimate goal is to manufacture a battery that can be charged by light. As a result, (1) for the aqueous solution of the positive electrode active material, high-efficiency photo-oxidation conditions were determined by adjusting the pH and removing the charge. (2) It was clarified by synchrotron radiation X-ray absorption experiments that the redox reaction occurs by the formation and scission of disulfide bonds, and it was confirmed by ultraviolet spectroscopic experiments that the photo-oxidation reaction occurred. (3) It was clarified that light irradiation enhance the voltage boost rate.
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| Free Research Field |
物質科学
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| Academic Significance and Societal Importance of the Research Achievements |
光充電可能な電池が実現すれば、携帯情報通信機器の充電作業や充電頻度が軽減され、その利便性、メンテナンス性が飛躍的に向上する。これは、ICTやIoT社会に大きな波及効果をもたらす。本研究では、電池正極材料の充電反応に対応する酸化反応が、光照射で起こることを実験的に証明した。更に、電池への光照射により電圧上昇率向上を確認し、光充電可能な電池の原理検証をおこなった。これにより、光充電可能な電池の実現に向けた基盤を確立した。
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