Wan, K;
Liu, Z;
Schroeder, BC;
Chen, G;
Santagiuliana, G;
Papageorgiou, DG;
Zhang, H;
(2021)
Highly stretchable and sensitive self-powered sensors based on the N-Type thermoelectric effect of polyurethane/Na_{x}(Ni-ett)_{n}/graphene oxide composites.
Composites Communications
, 28
, Article 100952. 10.1016/j.coco.2021.100952.
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Abstract
The development of stretchable organic thermoelectric materials is prompted by fast evolving application fields like flexible electronic devices, soft robotics, health monitoring and internet-of-things. Stretchability in thermoelectric materials is usually obtained by using an insulating elastomer, either as a substrate or as a matrix in a blend or composite, which, unfortunately, leads to a compromise in thermoelectric performance. Herein, a potential solution is reported exploiting the addition of graphene oxide as a secondary (nano)filler in a polyurethane/poly nickel-ethenetetrathiolates film. Compared with traditional binary blends, our ternary composite shows an increased electrical conductivity (4 times), air-stability (∼20 times after 3 months), and stretchability (38% increase in strain at break). With a gauge factor (GF) of ∼58, this new composite film shows high sensitivity to tensile strain. Thanks to its Seebeck coefficient of ∼ −40 μV K^{−1}, the composite film can generate a thermopower of ∼0.25 pW when subjected to a small temperature difference (30 °C), which could be exploited by self-powered strain sensors. Therefore, the ternary polyurethane/poly nickel-ethenetetrathiolates/graphene oxide composite film can work as a stretchable strain sensor, providing a strategy to reconcile the compromise between thermoelectric performance and stretchability.
| Type: | Article |
|---|---|
| Title: | Highly stretchable and sensitive self-powered sensors based on the N-Type thermoelectric effect of polyurethane/Na_{x}(Ni-ett)_{n}/graphene oxide composites |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.coco.2021.100952 |
| Publisher version: | https://doi.org/10.1016/j.coco.2021.100952 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10138725 |
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