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In situ growth of 2D metal-organic framework ion sieve interphase for reversible zinc anodes
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  • Jing SUN,
  • Qinping Jian,
  • Bin Liu,
  • Pengzhu Lin,
  • T.S. Zhao
Jing SUN
The Hong Kong University of Science and Technology
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Qinping Jian
The Hong Kong University of Science and Technology
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Bin Liu
The Hong Kong University of Science and Technology
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Pengzhu Lin
The Hong Kong University of Science and Technology
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T.S. Zhao
Hong Kong University of Science and Technology School of Engineering

Corresponding Author:[email protected]

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Abstract

Zinc metal anodes are gaining popularity in aqueous electrochemical energy storage systems for their high safety, cost-effectiveness, and high capacity. However, the service life of zinc metal anodes is severely constrained by critical challenges, including dendrites, water-induced hydrogen evolution, and passivation. In this study, a protective two-dimensional metal-organic framework interphase is in situ constructed on the zinc anode surface with a novel gel vapor deposition method. The ultrathin interphase layer (~1 µm) is made of layer-stacking 2D nanosheets with angstrom-level pores of around 2.1 Å, which serves as an ion sieve to reject large solvent-ion pairs while homogenizes the transport of partially desolvated zinc ions, contributing to a uniform and highly reversible zinc deposition. With the shielding of the interphase layer, an ultra-stable zinc plating/stripping is achieved in symmetric cells with cycling over 1000 h at 0.5 mA cm-2 and ~700 h at 1 mA cm-2, far exceeding that of the bare zinc anodes (250 and 70 h). Furthermore, as a proof-of-concept demonstration, the full cell paired with MnO2 cathode demonstrates improved rate performances and stable cycling (1200 cycles at 1 A g-1). This work provides fresh insights into interphase design to promote the performance of zinc metal anodes.
Submitted to Energy & Environmental Materials
05 Feb 2024Review(s) Completed, Editorial Evaluation Pending
09 Mar 20241st Revision Received
11 Mar 2024Assigned to Editor
11 Mar 2024Submission Checks Completed
11 Mar 2024Review(s) Completed, Editorial Evaluation Pending
17 Apr 2024Editorial Decision: Accept