Abstract
The inherent defects of zinc metal anodes, including unmanageable dendrite growth and intricate side reactions, pose significant obstacles to the progress of aqueous zinc-ion batteries. Here, a fluorinated covalent triazine framework (FCTF) is proposed as a protective layer for zinc anodes. The FCTFs with different specific surface areas are prepared by adjusting the amount of catalyst. The FCTF-5 layer, which has the highest specific surface area (903 m2 g−1), can expose more zincophilic sites (N atoms) reducing the nucleation overpotential and inducing uniform deposition of zinc. Moreover, the presence of F-containing nanochannels enhances ion transport while safeguarding against aqueous electrolyte penetration, thereby enhancing corrosion resistance. Therefore, the Zn@FCTF-5//Zn@FCTF-5 symmetric cell can cycle stably for more than 8000 h at 0.5 mA cm−2. Meanwhile, the Zn@FCTF-5//CVO full battery demonstrates a high initial discharge capacity of 311.1 mAh g−1. This work presents a promising approach for tackling the challenges associated with anodes in zinc-ion batteries.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have