Kurita Hiroki, Katabira Kenichi, Yoshida Yu, Narita Fumio
Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai 980-8579, Japan.
Materials (Basel). 2019 Jun 26;12(13):2055. doi: 10.3390/ma12132055.
Wearable energy harvesting devices attract attention as the devices provide electrical power without inhibiting user mobility and independence. While the piezoelectric materials integrated shoes have been considered as wearable energy harvesting devices for a long time, they can lose their energy harvesting performance after being used several times due to their brittleness. In this study, we focused on Fe-Co magnetostrictive materials and fabricated Fe-Co magnetostrictive fiber integrated shoes. We revealed that Fe-Co magnetostrictive fiber integrated shoes are capable of generating 1.2 µJ from 1000 steps of usual walking by the Villari (inverse magnetostrictive) effect. It seems that the output energy is dependent on user habit on ambulation, not on their weight. From both a mechanical and functional point of view, Fe-Co magnetostrictive fiber integrated shoes demonstrated stable energy harvesting performance after being used many times. It is likely that Fe-Co magnetostrictive fiber integrated shoes are available as sustainable and wearable energy harvesting devices.
可穿戴能量收集装置备受关注，因为这类装置在不影响用户行动能力和独立性的情况下提供电力。虽然集成了压电材料的鞋子长期以来一直被视为可穿戴能量收集装置，但由于其脆性，在使用几次后就会失去能量收集性能。在本研究中，我们聚焦于铁钴磁致伸缩材料，并制造了集成铁钴磁致伸缩纤维的鞋子。我们发现，集成铁钴磁致伸缩纤维的鞋子通过维拉里（逆磁致伸缩）效应，在正常行走1000步的过程中能够产生1.2微焦耳的能量。输出能量似乎取决于用户的行走习惯，而非他们的体重。从机械和功能角度来看，集成铁钴磁致伸缩纤维的鞋子在多次使用后展现出稳定的能量收集性能。集成铁钴磁致伸缩纤维的鞋子很可能可作为可持续的可穿戴能量收集装置。
