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MXene based mechanically and electrically enhanced film for triboelectric nanogenerator

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The development of triboelectric nanogenerator (TENG) technology which can directly convert ambient mechanical energy into electric energy may affect areas from green energy harvesting to emerging wearing electronics. And, the material of triboelectric layer is critical to the mechanical robustness and electrical output characteristics of the TENGs. Herein, a MXene enhanced electret polytetrafluoroethylene (PTFE) film with a high mechanical property and surface charge density is developed. The MXene/PTFE composite film was synthesized by spraying and annealing treatment. With the doping of MXene, the crystallinity of composite film could be tuned, leading to an enhancement in the tensile property of 450% and reducing the wear volume about 80% in the friction test. Furthermore, the as-fabricated TENG with this composite film outputs 397 V of open-circuit voltage, 21 µA of short-circuit current, and 232 nC of transfer charge quantity, which are 4, 6, and 6 times higher than that of the TENG made by pure PTFE film, respectively. Therefore, this work provides a creative strategy to simultaneously improve the mechanical property and electrical performance of the TENGs, which have great potential in improving device stability under a complex mechanical environment.

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  • 02 May 2021

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The authors thank the support of the National Natural Science Foundation of China (Nos. 51922023 and 61874011), National Key Research and Development Program of China (No. 2016YFA0202704), Beijing Talents Foundation (No. 2017000021223TD04), Tribology Science Fund of State Key Laboratory of Tribology (No. SKLTKF19B02), Open Research Foundation of State Key Laboratory of Digital Manufacturing Equipment & Technology (DMETKF2020014), and Young Scientific and Technological Innovation Research Team Funds of Sichuan Province (No. 20CXTD0106). Furthermore, the authors are grateful to Dr. Weijie Sun, who work as an engineer of material analysis test center of Beijing Institute of Nanoenergy and Nanosystems, for the material characterization.

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Correspondence to Weiqing Yang or Chi Zhang.

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Gao, Y., Liu, G., Bu, T. et al. MXene based mechanically and electrically enhanced film for triboelectric nanogenerator. Nano Res. 14, 4833–4840 (2021).

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  • MXene
  • polytetrafluoroethylene (PTFE)
  • mechanically and electrically enhanced
  • triboelectric layer
  • triboelectric nanogenerator