Jump to main content
Jump to site search


Coaxial Struts and Microfractured Structures of Compressible Thermoelectric Foams for Self-powered Pressure Sensors

Abstract

Long-term operation of wearable pressure sensors to detect body movement requires self-powered human-based energy sources to minimize the need for recharging. Recently, pressure sensors with thermoelectric property based on conducting polymers have been reported; however, these devices are limited in their ability to simultaneously satisfy sufficient power generation and sensitivity of the sensor. In this article, we suggest a coaxial strut structure of poly(styrene-ethylene/butylene-styrene)(SEBS)-poly(3,4-ethylenedioxythiophene):poly (styrenesulfonate)(PEDOT:PSS)-melamine foam (MF) with a fractured microstructure for a highly sensitive, efficient self-powered pressure sensor. In the coaxial struts, the MF core provides a compressible and elastic framework; the intermediate PEDOT:PSS acts as a conductor and a thermoelectric material; and the SEBS shell ensures mechanical stability and resilience to stabilize the brittle PEDOT:PSS layer under high loading conditions. Additionally, by compressing the coaxial foam to 1/20, partial microfracture of the PEDOT:PSS occurs only in the SEBS shell; thus, the pressure sensitivity increases significantly while maintaining high conductivity and thermoelectric performance. The coaxial foam was assembled into a wearable TEG to generate 338 nW from the forearms and demonstrate the high sensitivity of pressure sensors without external power supply.

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Jun 2018, accepted on 31 Aug 2018 and first published on 05 Sep 2018


Article type: Paper
DOI: 10.1039/C8NR04582H
Citation: Nanoscale, 2018, Accepted Manuscript
  •   Request permissions

    Coaxial Struts and Microfractured Structures of Compressible Thermoelectric Foams for Self-powered Pressure Sensors

    J. Oh, J. Kim, K. T. Park, J. kiyoung, J. Lee, H. Kim and J. G. Son, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR04582H

Search articles by author

Spotlight

Advertisements