HF-free synthesis of high-entropy MXene-PVA composite film and its flexible nanogenerator

IF 7.4 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2025-07-03 DOI:10.1007/s40843-025-3445-x

Fumei Yang (, ), Kam Lin Chan (, ), Zehan Wu (, ), Fangqing Zhao (, ), Man Chung Wong (, ), Sin-Yi Pang (, ), Jianhua Hao (, )

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引用次数: 0

Abstract

MXene exhibits notable piezoelectric properties, making it a promising material for high-performance piezoelectric nanogenerators (PENGs) in next-generation smart wearable devices and bioelectronics. However, current MXene-based PENGs face challenges such as insufficient mechanical robustness, low piezoelectric response, and limited long-term functionality. These limitations primarily stem from the small effective area and low strain levels of MXene nanosheets. Here, we constructed a high-entropy TiVCrMoC₃T_x MXene composite film by leveraging strong hydrogen bonding interactions between MXene and polyvinyl alcohol (PVA), which was further developed into a self-powered flexible nanogenerator. The resulting device exhibited a significant piezoresponse with output signals of 500 mV and 790 pA under a compressive force of 3.47 N, along with considerable long-term functionality over 1500 cycles. Moreover, a hydrofluoric-free etching approach was employed to synthesize the high-entropy MXene nanosheets, which ensures the safety and biocompatibility for bioelectronics applications. This work highlights the potential of high-entropy MXene for sustainable applications in wearable electronics and energy harvesting.

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高熵MXene-PVA复合膜的无高频合成及其柔性纳米发生器

MXene具有显著的压电特性，是下一代智能可穿戴设备和生物电子学中高性能压电纳米发电机（peng）的理想材料。然而，目前基于mxene的peng面临着机械鲁棒性不足、压电响应低、长期功能有限等挑战。这些限制主要源于MXene纳米片的有效面积小，应变水平低。本研究利用MXene与聚乙烯醇（PVA）之间的强氢键相互作用，构建了高熵的ticrmoc3tx MXene复合薄膜，并将其进一步发展为自供电的柔性纳米发电机。所得到的器件在3.47 N的压缩力下表现出显著的压响应，输出信号为500 mV和790 pA，并且在1500个周期内具有相当长的长期功能。此外，采用无氢氟蚀刻方法合成了高熵MXene纳米片，确保了生物电子学应用的安全性和生物相容性。这项工作强调了高熵MXene在可穿戴电子产品和能量收集方面的可持续应用潜力。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.