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Construction of flexible cellulose nanofiber fiber@graphene quantum dots hybrid film applied in supercapacitor and sensor

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Abstract

Cellulose nanofiber (CNF) materials have attracted increasing attention in the field of energy storage and sensing due to their flexibility, environmental protection and sustainability. However, CNF materials have poor conductivity and low utilization effciency, which limits their applications. Improving the conductivity and utilization efficiency of CNFs while retaining their advantages is of great significance for developing wide applications of biomass resources. In this work, noncarbonized CNF@graphene quantum dot (GQD) film with good flexibility was fabricated through a combination of electrolysis and liquid dispersion. The as-obtained hybrid film shows excellent electrochemical storage performance, mechanical properties and sensing characteristics. Specifically, the film presents a specific capacitance of 118 mF cm− 2 even at a ultrahigh scan rate of 1000 mV s− 1, and a high capacitance retention higher than 93% at different current densities after 5000 cycles. Additionally, the assembled supercapacitor based on the hybrid film possesses high power and energy density at the same time (782 mW cm− 2 and 596 µWh cm− 2). These results demonstrate that the hybrid film possesses excellent rate performance and cycle stability. In addition, the film is sensitive to movement of the human body.

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Acknowledgments

This work was supported by supported by fund of National Natural Science Foundation of China (22078184); China Postdoctoral Science Foundation (2019M653853XB); Natural Science Foundation of Shaanxi Province (2020JQ-729); Opening Project of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control (2019KF21); Natural science advance research foundation of Shaanxi University of Science and Technology (2018QNBJ-03); National Demonstration Center for Experimental Light Chemistry Engineering Education (2018QGSJ02-13); Jiangxi Qingyue Technology Co., Ltd (210200122), and Biomass Chemistry and Materials Acadamician Workstation Project in SUST (134090002).

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Correspondence to Chuanyin Xiong.

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We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work, there is no professional or other personal interest of any nature or kind in any product, service and/or company that could be construed as influencing the position presented in, or the review of, the manuscript entitled, “Construction of Flexible Nano Cellulose Fiber@Graphene Quantum Dots Hybrid Film Applied in Supercapacitor and Sensor”.

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Animal studies or human participants involvement in the study have been approved by the Ethics Committee of Shaanxi University of science and technology and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki. The author hereby declares that the research documented in the submitted manuscript has been carried out in accordance with the above stated ethical standards.

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Xiong, C., Xu, J., Han, Q. et al. Construction of flexible cellulose nanofiber fiber@graphene quantum dots hybrid film applied in supercapacitor and sensor. Cellulose 28, 10359–10372 (2021). https://doi.org/10.1007/s10570-021-04178-x

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  • DOI: https://doi.org/10.1007/s10570-021-04178-x

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