Regulating Exposed Facets of Metal-Organic Frameworks for High-rate Alkaline Aqueous Zinc Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Article numbere202209794
Journal / PublicationAngewandte Chemie - International Edition
Issue number47
Online published3 Oct 2022
Publication statusPublished - 21 Nov 2022


Metal-organic frameworks (MOFs) have drawn growing attention as promising electrode candidates for rechargeable batteries. However, most studies focus on the direct use of MOF electrodes without any modification. Post-synthetic modification, a judicious tool to modify targeted properties of MOFs, has been long-neglected in the field of batteries. Herein, crystal-facet engineering is proposed to design MOF-based electrodes with high capacity and fast electrochemical kinetics. We found that a thermally-modified strategy can regulate the dominant exposed facet of Ni-based MOF (PFC-8). With the optimally exposed facets, the battery exhibited admirable rate capability (139.4 mAh g−1 at 2.5 A g−1 and 110.0 mAh g−1 at 30 A g−1) and long-term stability. Furthermore, density functional theory calculations demonstrate that stronger OH adsorption behaviors and optimized electronic structures induced by the regulated exposed facets boost the electrochemical performance.

Research Area(s)

  • Aqueous Zinc Batteries, Facets, Metal–Organic Frameworks, Superior Rate Capability