Giant nanomechanical energy storage capacity in twisted single-walled carbon nanotube ropes

• DOI: 10.1038/s41565-024-01645-x
• Publication Date: 2024-04-16T10:01:29Z
• Authors: Shigenori Utsumi; Sanjeev Kumar Ujjain; Satoshi Takahashi; Ryo Shimodomae; Tae Yamaura; Ryosuke Okuda; Ryuichiro Kobayashi; Oga Takahashi; Satoshi Miyazono; Naoki Kato; Keiichi Aburamoto; Yuta Hosoi; Preety Ahuja; Ayumi Furuse; Yuma Kawamata; Hayato Otsuka; Kazunori Fujisawa; Takuya Hayashi; David Tománek; Katsumi Kaneko
• Keywords: Nanomaterials

A sustainable society requires high-energy storage devices characterized by lightness, compactness, a long life and superior safety, surpassing current battery supercapacitor technologies. Single-walled carbon nanotubes (SWCNTs), which typically exhibit great toughness, have emerged as promising candidates for innovative energy solutions. Here we produced SWCNT ropes wrapped in thermoplastic polyurethane elastomers, demonstrated experimentally that twisted rope composed of these SWCNTs possesses the remarkable ability to reversibly store nanomechanical energy. Notably, gravimetric density reaches up 2.1 MJ kg