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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. 4 — TE performance of p–n segmented core–shell TE fibers. TE properties of a n-type MXene and b p-type MXene/SWCNT-COOH materials, including power factor, Seebeck coefficient at different temperatures and electrical conductivity. c TE generation mechanism of p–n segmented TE fibers. d Output voltage of different numbers of p or n-type fibers at various temperature. e Open-circuit voltages of p–n segmented TE fibers including different pairs of p–n segments under different temperature. f Output voltage curves of p–n segmented TE fibers during alternating heating at 400 °C and cooling at room temperature for 5 cycles with 20 pairs of p–n segments. g Resistance changes and output voltage under different bending angles for TE fibers composed of 20 pairs of p–n segments. h The effect of bending cycles on resistance and output voltage at a bending angle of 150° with 20 pairs of p–n segments in TE fiber