Improvement of triboelectricf power generator output and study of tribological phenomena in large electricfield

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01240
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 18040:Machine elements and tribology-related
• Research Institution: Kansai University
• Principal Investigator: Tani Hiroshi 関西大学, システム理工学部, 教授 (40512702)
• Co-Investigator(Kenkyū-buntansha): 呂 仁国 関西大学, システム理工学部, 教授 (90758210)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: トライボロジー / トライボケミカル反応 / 摩擦発電 / イオン液体 / 帯電

Outline of Final Research Achievements

The research was conducted with the goals of improving the power output of a triboelectric power generator and proposing a practical device structure for a triboelectric power generator. As a result, the following were found. (1) The charge density of the triboelectrification increases by adding a very small amount of ionic liquid (10-20 ppm) to the PVDF film, and the triboelectric power output increases by a factor of two or more. Furthermore, it was found that the amount of charge density increased to two times by the porous composite PVDF film with ionic liquid. (2) The prototype triboelectric power generator was subjected to an acceleration test in which a large impact of 200 G was applied. No significant wear of the charged films was observed even after about 10e6 contact/separation cycles, indicating that the triboelectric power generator has sufficient durability.

Free Research Field

トライボロジー

Academic Significance and Societal Importance of the Research Achievements

本研究によって見出したイオン液体添加ならびにポーラス化による摩擦発電機の出力向上によって，出力を約4倍にする指針を見出すことが出来たことは画期的である．これにより摩擦発電機の実用化に大きく貢献できると考えられる．また，厳しい加速試験でその耐久性についても確認できた．さらに，摩擦中に摩擦面から発生するトライボ電子を用いて，電場によって摩擦生成物の生成をコントロールすることが出来ることを示した．このことは電場による摩擦係数のコントロール可能性を示しておりトライボロジーにおける新しい知見と考えられる．