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. 2023 Oct 13;15:226. doi: 10.1007/s40820-023-01200-8

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 7 — Application of TET in a self-powered wireless fire alarm system. a Schematic showing the TET as a self-powered fire warning sensor that provides active fire protection to firefighters. b Photographs of TET-based fire warning device that has been integrated into firefighting clothing. c Circuit diagram of TET-based self-powered wireless fire alarm system. d Integrated location of TET in firefighting clothing (including fire-retardant layer, TET, moisture barrier layer, heat insulation layer and comfortable layer). e Proof of concept of the self-powered fire warning TET in the firefighting clothing, with the TET serving as a fire warning sensor and a power supply and a wireless communication as a means of warning