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; Zaiping Guo

doi:10.1038/s41467-021-26947-9

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

Nat Commun. 2021 Nov 16;12(1):6606. doi: 10.1038/s41467-021-26947-9.

Authors

Zedong Zhao^#¹, Rong Wang^#¹, Chengxin Peng^{2

3}, Wuji Chen¹, Tianqi Wu¹, Bo Hu¹, Weijun Weng¹, Ying Yao¹, Jiaxi Zeng¹, Zhihong Chen⁴, Peiying Liu¹, Yicheng Liu¹, Guisheng Li⁴, Jia Guo⁵, Hongbin Lu^{6

7}, Zaiping Guo⁸

Affiliations

¹ State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, 200438, Shanghai, China.
² School of Materials Science & Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China. cxpeng@usst.edu.cn.
³ Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, 300071, Tianjin, China. cxpeng@usst.edu.cn.
⁴ School of Materials Science & Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
⁵ State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, 200438, Shanghai, China. guojia@fudan.edu.cn.
⁶ State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, 2005 Songhu Road, 200438, Shanghai, China. hongbinlu@fudan.edu.cn.
⁷ Yiwu Research Institute of Fudan University, Chengbei Road, 322000, Yiwu, Zhejiang, China. hongbinlu@fudan.edu.cn.
⁸ Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia. Zaiping.guo@adelaide.edu.au.

^# Contributed equally.

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.