Synergistic effect of microscopic buckle and macroscopic coil for self-powered organ motion sensor

Hyeon Jun Sim, Juwan Kim, Wonkyeong Son, Jae Myeong Lee, Dong Yeop Lee, Young Jin Kim, Young Kwan Kim, Seon Jeong Kim, Jae Min Oh, Changsoon Choi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Although soft mechano-electrochemical energy harvesters have attracted considerable attention as wearable sensors, they face challenges, including low output performance, high Young's modulus and low energy-conversion efficiency. To address these limitations, we introduce a novel design featuring macroscopically coiled and microscopically buckled fibres to improve the mechano-electrochemical energy-harvesting capability, thereby maximising capacitance change and affording higher electrical output. The harvester achieved a gravimetric peak current density of 121 A/kg and a peak power density of 16 W/kg. Moreover, the harvester showed enhanced stretchability under a strain of over 400 %, low Young's modulus of 0.2 MPa and an energy conversion efficiency of 0.33 %. Furthermore, when implanted in a pig's bladder, it showed minimal impact during expansion and contraction thanks to its softness and provided real-time electrical output in response to static and dynamic volume changes.

Original languageEnglish
Article number109889
JournalNano Energy
Volume128
DOIs
StatePublished - Sep 2024

Keywords

  • Fibre
  • Mechano-electrochemical energy harvester
  • Self-powered sensor
  • Softness
  • Stretchable

Fingerprint

Dive into the research topics of 'Synergistic effect of microscopic buckle and macroscopic coil for self-powered organ motion sensor'. Together they form a unique fingerprint.

Cite this