Issue 45, 2022

Hydrogel-based printing strategy for high-performance flexible thermoelectric generators

Abstract

Flexible thermoelectric (TE) devices can utilize the slight temperature difference between curved surfaces and surroundings to generate TE potential, presenting great potential in microelectronic energy supply and wearable sensing. Printing method has been employed to fabricate high-performance flexible TE films by means of excellent capability of assembling nanomaterials, but the decrease in the electrical conductivity caused by organic matters in the thermoelectric pastes will significantly reduce the thermoelectric performance. Herein, we report a hydrogel-based printing strategy to deposit flexible TE generators on various flexible substrates. The hydrogel network formed by physical crosslinking and molecular chain entanglement at 0.498 wt% carboxylated cellulose nanofibers can effectively limit the fluidity of 1D nanorod dispersion, which produces only <5% decline in electrical conductivity and Seebeck coefficient compared to the pure inorganic nanorod films. The device with 72 couples constructed by printing presents a high power density of 1.278 W m−2 under a temperature difference of 50 K. The advantages of hydrogel-based printing can broaden application prospects in the field of wearable electronics.

Graphical abstract: Hydrogel-based printing strategy for high-performance flexible thermoelectric generators

Supplementary files

Article information

Article type
Paper
Submitted
16 10月 2022
Accepted
20 10月 2022
First published
09 11月 2022

Nanoscale, 2022,14, 16857-16864

Hydrogel-based printing strategy for high-performance flexible thermoelectric generators

B. Wu, J. Geng, Y. Lin, C. Hou, Q. Zhang, Y. Li and H. Wang, Nanoscale, 2022, 14, 16857 DOI: 10.1039/D2NR05733F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements