A flexible quasi-solid-state thermoelectrochemical cell with high stretchability as an energy-autonomous strain sensor

Liang, Lirong and Lv, Haicai and Shi, Xiao-Lei ORCID: https://orcid.org/0000-0003-0905-2547 and Liu, Zhuoxin and Chen, Guangming and Chen, Zhi-Gang ORCID: https://orcid.org/0000-0002-9309-7993 and Sun, Guoxing (2021) A flexible quasi-solid-state thermoelectrochemical cell with high stretchability as an energy-autonomous strain sensor. Materials Horizons, 8. ISSN 2051-6347


Abstract

The design of effective energy systems is crucial for the development of flexible and wearable electronics. Regarding direct converting heat into electricity, thermoelectrochemical cells (TECs) are particularly suitable for low-grade heat harvesting to enable flexible and wearable applications, despite the fact that the electrolyte leakage and complex packaging issues of conventional liquid-based TECs await to be further addressed. Herein, a quasi-solid-state TEC is assembled from polyacrylamide/acidified-single-walled carbon nanotubes (PAAm/a-SWCNTs) composite hydrogel, developed via a facile in situ free-radical polymerization route with tin (IV) chloride/tin (II) chloride (Sn4+/Sn2+) as a redox couple. The as-fabricated TEC with 0.6 wt% a-SWCNTs content presents a large thermoelectrochemical Seebeck coefficient of 1.59 ± 0.07 mV K-1, and exhibits excellent stability in thermoelectrochemical performance against large mechanical stretching and deformation. Owing to this superior stretchability, the as-fabricated TEC is further assembled into an energy-autonomous strain sensor, which shows high sensitivity. The strategy of utilizing quasi-solid-state TEC for energy-autonomous strain sensing unveils the great potential of heat-to-electricity conversion in flexible and wearable electronics.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © The Royal Society of Chemistry 2021.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 12 Jul 2021 05:40
Last Modified: 16 Aug 2021 23:58
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
Identification Number or DOI: https://doi.org/10.1039/D1MH00775K
URI: http://eprints.usq.edu.au/id/eprint/42675

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