TY  - JOUR
AU  - Li, Zhongliang
AU  - Hong, Zuchen
AU  - Yuan, Chenxu
AU  - Ouyang, Wenxi
AU  - Liu, Jinghua
AU  - Yang, Guiying
AU  - Liu, Sai
AU  - Fang, Yiling
AU  - Lei, Ke
AU  - Wang, Wenbin
AU  - Li, Ying
AU  - Li, Hui
AU  - Tan, Liang
AU  - Lu, Weihong
AU  - Cai, Yuepeng
AU  - Zheng, Qifeng
PY  - 2026
TI  - Fluorine-Decorated Metal-Organic Framework Separators Enable Ion-Screening Effects for Dendrite-Free Zinc Deposition
JO  - Energy & Environmental Materials
SN  - 2575-0348
VL  - 9
IS  - 1
AB  - Aqueous zinc-ion batteries (AZIBs) have emerged as a promising complement to lithium-ion batteries due to their inherent safety benefits. However, the cycle life of AZIBs is severely limited by the poor stability of zinc anodes, manifested in uncontrolled dendritic growth and persistent side reactions, which hinder wider application. Herein, we report an ion-selective separator (UIO-66-4F/GF) achieved by in situ growth of a fluorine-functionalized metal–organic framework (UIO-66-4F) onto commercial glass fiber (GF). The synergistic mechanism, involving electrostatic repulsion between -F groups and anions along with strong interactions between -F and Zn2+ cations, effectively restricts migration, suppresses 2D Zn2+ diffusion across electrode interfaces, and enhances [Zn(H2O)6]2+ desolvation. Furthermore, the -F groups enable precise regulation of interfacial electric fields and Zn2+ concentration gradients, thereby homogenizing ion flux to realize dendrite-free Zn deposition. The UIO-66-4F separator achieves stable ZnZn cell operation for 1500 h at 1 mA cm−2 via oriented deposition and sustains long-term cycling over 1000 h at 1 mA cm−2, and delivers a ZnCu cell with 99.4% Coulombic efficiency. Moreover, the ZnUIO-66-4F/GFNH4V4O10 full cell represents an ultrastable cycling stability with a high capacity retention of 90% after 500 cycles at a current density of 1 A g−1.
UR  - https://doi.org/10.1002/eem2.70095
DO  - 10.1002/eem2.70095