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Ultrathin Zn-free anode based on Ti3C2Tx and nanocellulose enabling high-durability aqueous hybrid Zn-Na battery with Zn2+/Na+ co-intercalation mechanism

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Abstract

With low cost and high safety, aqueous zinc-based batteries have received considerable interest. Nevertheless, the excess utilization of zinc metal in the anodes of these batteries reduces energy density and increases costs. Herein, an ultrathin electrode of approximately 6.2 μm thick is constructed by coating Ti3C2Tx/nanocellulose hybrid onto a stainless steel foil. This electrode is used as the Zn-free anode for aqueous hybrid Zn-Na battery, in which, a concentrated electrolyte is used to improve electrochemical reversibility. The Ti3C2Tx/nanocellulose coating is found to improve the electrolyte wettability, facilitate desolvation process of hydrated Zn2+ ions, lower nucleation overpotential, improve zinc plating kinetics, guide horizontal zinc plating along the Zn(002) facet, and inhibit parasitic side reactions. It is also found that the Na3V2(PO4)3 cathode material adopts a highly reversible Zn2+/Na+ co-intercalation charge storage mechanism in this system. Thanks to these benefits, the assembled hybrid Zn-Na battery exhibits excellent rate capability, superior cyclability, and good anti-freezing ability. This work provides a new concept of electrode design for electrochemical energy storage.

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Acknowledgements

We acknowledge the financial support from the National Natural Science Foundation of China (No. 51902165), the Program of High-Level Talents in Six Industries of Jiangsu Province (No. XCL-040), and the Jiangsu Specially-Appointed Professor Program.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China

    Hao Chen, Weijun Zhou, Minfeng Chen, Xiang Han & Jizhang Chen

  2. Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, China

    Qinghua Tian

  3. Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, China

    Xiang Han & Jizhang Chen

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  1. Hao Chen
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Ultrathin Zn-free anode based on Ti3C2Tx and nanocellulose enabling high-durability aqueous hybrid Zn-Na battery with Zn2+/Na+ co-intercalation mechanism

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Chen, H., Zhou, W., Chen, M. et al. Ultrathin Zn-free anode based on Ti3C2Tx and nanocellulose enabling high-durability aqueous hybrid Zn-Na battery with Zn2+/Na+ co-intercalation mechanism. Nano Res. 16, 536–544 (2023). https://doi.org/10.1007/s12274-022-4916-z

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