Horizontally arranged zinc platelet electrodeposits modulated by fluorinated covalent organic framework film for high-rate and durable aqueous zinc ion batteries

Zedong Zhao, Rong Wang, Chengxin Peng (), Wuji Chen, Tianqi Wu, Bo Hu, Weijun Weng, Ying Yao, Jiaxi Zeng, Zhihong Chen, Peiying Liu, Yicheng Liu, Guisheng Li, Jia Guo (), Hongbin Lu () and Zaiping Guo ()
Additional contact information
Zedong Zhao: Fudan University
Rong Wang: Fudan University
Chengxin Peng: University of Shanghai for Science and Technology
Wuji Chen: Fudan University
Tianqi Wu: Fudan University
Bo Hu: Fudan University
Weijun Weng: Fudan University
Ying Yao: Fudan University
Jiaxi Zeng: Fudan University
Zhihong Chen: University of Shanghai for Science and Technology
Peiying Liu: Fudan University
Yicheng Liu: Fudan University
Guisheng Li: University of Shanghai for Science and Technology
Jia Guo: Fudan University
Hongbin Lu: Fudan University
Zaiping Guo: The University of Adelaide

Nature Communications, 2021, vol. 12, issue 1, 1-14

Abstract: Abstract Rechargeable aqueous zinc-ion batteries (RZIBs) provide a promising complementarity to the existing lithium-ion batteries due to their low cost, non-toxicity and intrinsic safety. However, Zn anodes suffer from zinc dendrite growth and electrolyte corrosion, resulting in poor reversibility. Here, we develop an ultrathin, fluorinated two-dimensional porous covalent organic framework (FCOF) film as a protective layer on the Zn surface. The strong interaction between fluorine (F) in FCOF and Zn reduces the surface energy of the Zn (002) crystal plane, enabling the preferred growth of (002) planes during the electrodeposition process. As a result, Zn deposits show horizontally arranged platelet morphology with (002) orientations preferred. Furthermore, F-containing nanochannels facilitate ion transport and prevent electrolyte penetration for improving corrosion resistance. The FCOF@Zn symmetric cells achieve stability for over 750 h at an ultrahigh current density of 40 mA cm−2. The high-areal-capacity full cells demonstrate hundreds of cycles under high Zn utilization conditions.

Date: 2021
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DOI: 10.1038/s41467-021-26947-9

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