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A functionalized separator enables dendrite‐free Zn anode via metal‐polydopamine coordination chemistry

Authors :
Yanfen Liu
Shude Liu
Xuesong Xie
Zhicheng Li
Pinji Wang
Bingan Lu
Shuquan Liang
Yan Tang
Jiang Zhou
Source :
InfoMat, Vol 5, Iss 3, Pp n/a-n/a (2023)
Publication Year :
2023
Publisher :
Wiley, 2023.

Abstract

Abstract Designing a multifunctional separator with abundant ion migration paths is crucial for tuning the ion transport in rocking‐chair‐type batteries. Herein, a polydopamine‐functionalized PVDF (PVDF@PDA) nanofibrous membrane is designed to serve as a separator for aqueous zinc‐ion batteries (AZIBs). The functional groups (OH and NH) in PDA facilitate the formation of ZnO and ZnN coordination bonds with Zn ions, homogenizing the Zn‐ion flux and thus enabling dendrite‐free Zn deposition. Moreover, the PVDF@PDA separator effectively inhibits the shuttling of V‐species through the formation of VO coordination bonds. As a result, the Zn/NH4V4O10 battery with the PVDF@PDA separator exhibits enhanced cycling stability (92.3% after 1000 cycles at 5 A g−1) and rate capability compared to that using a glass fiber separator. This work provides a new avenue to design functionalized separators for high‐performance AZIBs.

Details

Language :
English
ISSN :
25673165
Volume :
5
Issue :
3
Database :
Directory of Open Access Journals
Journal :
InfoMat
Publication Type :
Academic Journal
Accession number :
edsdoj.9432ef66bcbd4d34991b5d9575a5d4ce
Document Type :
article
Full Text :
https://doi.org/10.1002/inf2.12374