Self-Transformed MOF-on-MXene Heterostructure as an Ion-Expedited Interphase toward Low-Temperature Multivalent Metal Batteries.

Authors

Shuang Cheng, Jian Wu, Jing Zhang, Qingbo Xiao, Yongzheng Zhang, Qinghua Guan, Bixian Chen, Huihua Li, Hongzhen Lin, Jian Wang

Published in

Journal of the American Chemical Society. Volume 148. Issue 34. Pages 37046-37055. Sep 02, 2026.

Abstract

Rechargeable aqueous multivalent metal batteries (AMMBs) are promising for next-generation safe energy storage systems owing to their high energy density and cost-effectiveness. However, strong ion-dipole interactions hinder desolvation and diffusion, resulting in large energy barriers and sluggish kinetics. To address these kinetic limitations, we develop a catalytic heterostructure comprising a porous, electron-delocalized metal-organic framework (MOF) integrated with MXene. This heterostructure is fabricated via partial self-transformation of Ti3C2Tx MXene into Ti-MOF (NH2-MOF-MXene), forming a Ti-MOF-MXene heterostructure. Acting as a kinetic promoter, it weakens electrostatic ion-dipole interactions, thereby accelerating interfacial Zn2+/Al3+ desolvation and diffusion while inhibiting dendrite formation, as confirmed by spectroscopic and electrochemical measurements. Moreover, the porous structure and electron-delocalized -NH2 polar groups effectively suppress active water formation from the solvation shell, thus inhibiting the hydrogen evolution reaction (HER). Consequently, symmetric Zn cells incorporating the NH2-MOF-MXene heterostructure achieve dendrite-free Zn plating with an extended lifespan of approximately 1000 h and high Coulombic efficiency under low temperatures (0 °C and -20 °C). Similarly, symmetric Al//Al cells incorporating the same heterostructure operate with reduced overpotentials and show improved stability from 100 to 220 h compared with bare Al//Al cells. These results establish an electron-delocalization pathway toward high-performance AMMBs.

PMID:
42701249
Bibliographic data and abstract were imported from PubMed on 06 Sep 2026.

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