2023-07-26 ヒューストン大学(UH)
UH researchers stretching, testing and monitoring the stretchable fabric-based lithium-ion battery’s performance. The gray striated section is the battery prototype.
◆従来の硬い電池と比較して、この新しい電池は柔軟で安全性が高く、ウェアラブルデバイスや埋め込み型のバイオセンサーに安定した性能を提供できる。これにより、スマートスペースーツや健康モニタリング衣服など、さまざまな応用が考えられる。
◆ただし、製造拡大やコスト面での課題があるため、市場への実用化にはさらなる研究と最適化が必要である。研究者たちは安全性を重視し、信頼性のある電池の実現を目指している。
＜関連情報＞
- https://uh.edu/news-events/stories/2023/july-2023/07262023-stretchable-flexible-batteries.php
- https://www.sciencedirect.com/science/article/abs/pii/S235243162300072X?via%3Dihub
伸縮自在の布製リチウムイオン電池 Stretchable fabric-based lithium-ion battery
Bahar Moradi Ghadi, Banafsheh Hekmatnia, Qiang Fu, Haleh Ardebili
Extreme Mechanics Letters Available online: 4 May 2023
DOI:https://doi.org/10.1016/j.eml.2023.102026
Abstract
In many applications ranging from wearable devices to implantable biosensors, next-generation electronics are expected to be stretchable which necessitates a concomitant development of fully stretchable batteries. Stretchable lithium-ion batteries must provide stable performance while subjected to mechanical deformations such as stretching, bending, and twisting. Although there has been a noticeable progress in the development of flexible energy storage devices, stretchable lithium-ion batteries still face several persistent challenges. While in a prior work we successfully presented a proof-of-concept that rendered just the cathode to be stretchable, in this work we present the design, fabrication and characterization of a complete fully stretchable fabric-based lithium ion battery. The electrochemical and mechanical performances of the fabric-based battery are investigated and discussed. Solid polymer electrolyte stretchable fabric-based battery offers a more compatible and safer alternative to liquid based batteries, especially for the application of textile wearable devices that may involve intimate contact with human skin and organs. We demonstrate that our fabric-based battery can stretch up to 15% strain without a significant increase in its internal impedance.
