Authors
Fan Yang, Zirui Lv, Hongrun Jin, Yuhang Liu, Xiaodong Rang, Wenyuan Hu, Yuanbo Song, Ying Wan, Tengsheng Zhang, Fanxing Bu, Dongliang Chao, Dongyuan Zhao
Published in
Angewandte Chemie (International ed. in English). Pages e3627132. Jul 13, 2026. Epub Jul 13, 2026.
Abstract
Zinc-iodine (4e--Zn─I2) batteries hold promise for grid-scale energy storage, but their development is hampered by the instability of I+ species and sluggish conversion kinetics. Here, we depart from conventional weak-interaction catalyst strategies and establish a strong interfacial Lewis acid chemistry based on mesoporous Zr-UiO-66, achieving effective stabilization of I+ species and efficient iodine conversion. Synchrotron characterizations reveal that mesopore engineering via a micelle pre-coordination strategy generates abundant interfacial unsaturated Zr sites with intrinsic Lewis acidity and a reduced coordination number on the pore walls of mesoporous Zr-UiO-66. These Lewis acid sites strongly adsorb and stabilize ICl2 -, and efficiently promote its conversion. Density functional theory calculations confirm the strong electronic coupling between Zr sites and iodine guests and the reduced energy barrier for I+/I2 conversion. Concurrently, mesoporous channels facilitate mass transport, enabling seamless ion and electron transport. The resultant Zr-Meso-UiO-66@I2 cathode delivers a reversible capacity of 390 mAh g-1 at 10 C, approaching the theoretical four-electron limit, along with unprecedented cycling stability with 89.7% capacity retention after 40,000 cycles at 100 C. The study offers a novel interfacial Lewis-acid catalysis strategy for activating 4e--Zn─I2 batteries.
PMID:
42438955
Bibliographic data and abstract were imported from PubMed on 13 Jul 2026.
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