Advanced Fiber Materials, Volume. 7, Issue 1, 00485(2025)

Highly Stretchable and Breathable Dry Bioelectrode with Low Impedance for Electrophysiological Monitoring

Hua Liu1, Gongwei Tian2, Qinyi Zhao1, Jianhui Chen1,2, Yan Liu1, Cuiyuan Liang1,3、*, and Dianpeng Qi1,2、**
Author Affiliations
  • 1MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, National and Local Joint Engineering Laboratory for Synthesis Transformation and Separation of Extreme Environmental Nutrients, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
  • 2Ministry of Industry and Information Technology, Key Laboratory of Science and Engineering For the Multi-Modal Prevention and Control of Major Chronic Diseases, Zhengzhou Research Institute of Harbin Institute of Technology, Zhengzhou 450000, People’s Republic of China
  • 3College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, People’s Republic of China
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    The high impedance caused by the lack of interfacial hydrogel in dry electrodes seriously affects the quality of acquired electrophysiological signals. Although there are existing strategies to reduce impedance with micro–nanostructures, achieving stretchable and breathable electrodes while ensuring low impedance is extremely challenging. Herein, we successfully prepared a dry textile electrode (nanomesh film (NF)-ZnO–polypyrrole (PPy)) with low impedance, high stretchability, and breathability. Wrinkle-nanorod coupled microstructures are constructed to increase the effective surface area and roughness of NF-ZnO–PPy electrode, achieving an exponential reduction in impedance compared with the smooth textile dry electrode (15.64 kΩ·cm-2 at 10 Hz, approximately 1/6 of the lowest impedance of reported electrodes). Simultaneously, the wrinkled structure formed by pre-stretching improves electrode’s stretchability (up to 910% strain) and cycle stability (R/R0 is within 1.08 after 1000 cycles at 30% strain). Furthermore, the NF-ZnO–PPy electrode has excellent breathability (2233.52 g·m-2·d-1) and good biocompatibility. Finally, as a proof of concept, the 16-channel NF-ZnO–PPy electrode can record electromyography signals in different states and parts of body for a long time ((22.03 ± 0.76) dB, which is twice that of the commercial electrode). Notably, we employ ZnO nanorods as a template to reduce impedance. This template strategy overcomes complex and expensive micro–nanomanufacturing technologies (photolithography, laser processing, etc.) and can be suitable for most flexible substrates, showing great potential in the field of soft electronics.

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    Hua Liu, Gongwei Tian, Qinyi Zhao, Jianhui Chen, Yan Liu, Cuiyuan Liang, Dianpeng Qi. Highly Stretchable and Breathable Dry Bioelectrode with Low Impedance for Electrophysiological Monitoring[J]. Advanced Fiber Materials, 2025, 7(1): 00485

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    Paper Information

    Category: Research Articles

    Received: Jun. 6, 2024

    Accepted: Sep. 4, 2024

    Published Online: Mar. 14, 2025

    The Author Email: Liang Cuiyuan (cuiyuanliang0523@163.com), Qi Dianpeng (dpqi@hit.edu.cn)

    DOI:10.1007/s42765-024-00485-7

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