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An overview of conductive composite hydrogels for flexible electronic devices

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Abstract

Conductive hydrogels (CHs) have shown great potential in smart wearable devices and energy storage due to their unique advantages, such as the mechanical properties and physiological characteristics similar to human skins and tissues (stretchability, low modulus, flexibility, biocompatibility, etc.), the function and structure design with diversity, and the transformation of external stimuli (force, deformation, temperature, etc.) into electronic signals. Currently, a large number of CHs have been developed and designed for specific applications. In this review, we first focus on the recent progress on the synthesis strategies of all kinds of CHs. Their categories involve conductive nanomaterial-based, free ionic-based, and conductive polymer-based CHs. Whereafter, the promising applications of CHs in flexible electronic devices are discussed in detail. The relevant applications include wearable strain sensors, bioelectronics, epidermal patch electrodes, temperature sensors, triboelectric nanogenerators (TENG), energy storage devices, and gas sensors. Finally, we also discuss the future research direction of CHs and the possible challenges in the field.

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Acknowledgements

Jiaying Chen and Fangfei Liu contributed equally to this work. The helpful discussion with Dr Jinwei Zhang (College of Biomass Science and Engineering, Sichuan University) is gratefully acknowledged.

Funding

This work was financially supported by the Natural Science Foundation of Xinjiang Uygur Autonomous Region (Nos. 2023D01C35, 2023D01C171), National Natural Science Foundation of China (Nos. 52363016, 22368046, 52163020), Xinjiang Tianchi Yingcai Project (No. 51052300523), and Xinjiang Tianchi Doctoral Project (No. TCBS202120).

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  1. Jiaying Chen and Fangfei Liu contributed equally to this work.

Authors and Affiliations

  1. State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, 830017, Xinjiang, People’s Republic of China

    Jiaying Chen, Fangfei Liu, Tursun Abdiryim & Xiong Liu

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  1. Jiaying Chen
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  2. Fangfei Liu
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  3. Tursun Abdiryim
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Jiaying Chen and Fangfei Liu wrote the main manuscript text and prepared figures. Tursun Abdiryim and Xiong Liu reviewed and edited the manuscript text. All authors read and approved the final manuscript.

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Correspondence to Fangfei Liu, Tursun Abdiryim or Xiong Liu.

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Chen, J., Liu, F., Abdiryim, T. et al. An overview of conductive composite hydrogels for flexible electronic devices. Adv Compos Hybrid Mater 7, 35 (2024). https://doi.org/10.1007/s42114-024-00841-6

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